111-519: Gillberg may refer to: Carina Gillberg or Christopher Gillberg , who published a set of diagnostic criteria for Asperger's Syndrome (known) as Gillberg and Gillberg Gillberg (wrestler) , American professional wrestler the Gillberg Hundred , a historical administrative subdivision Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
222-520: A carboxyl group, and a variable side chain are bonded . Only proline differs from this basic structure as it contains an unusual ring to the N-end amine group, which forces the CO–NH amide moiety into a fixed conformation. The side chains of the standard amino acids, detailed in the list of standard amino acids , have a great variety of chemical structures and properties; it is the combined effect of all of
333-470: A gene may be duplicated before it can mutate freely. However, this can also lead to complete loss of gene function and thus pseudo-genes . More commonly, single amino acid changes have limited consequences although some can change protein function substantially, especially in enzymes . For instance, many enzymes can change their substrate specificity by one or a few mutations. Changes in substrate specificity are facilitated by substrate promiscuity , i.e.
444-404: A suspended sentence as well as a fine, due to that he was found guilty of malfeasance in office due to his failure to make the research available for review. After a court looked over the case again and ruled that the data was to be made available for a review, three of Gillbergs coworkers destroyed the 22 shelf meters of research material. Which they were subsequently sentenced for. The case
555-552: A combination of sequence, structure and function, and they can be combined in many different ways. In an early study of 170,000 proteins, about two-thirds were assigned at least one domain, with larger proteins containing more domains (e.g. proteins larger than 600 amino acids having an average of more than 5 domains). Most proteins consist of linear polymers built from series of up to 20 different L -α- amino acids. All proteinogenic amino acids possess common structural features, including an α-carbon to which an amino group,
666-451: A combination of taped interviews, medical records, criminal records, school records, and psychiatric evaluations). The court ordered the university to set conditions for the access so that the interests of the children and the families would be protected. In April 2003, the university's Vice-Chancellor set the conditions: one of the persons requesting access, the sociologist Eva Kärfve , would have to get her research project approved by
777-399: A correct and legally secure manner. The debate about the case between representatives from the social sciences and natural sciences has continued in the popular press and in media. In 2007, the controversy resulted in a book by science journalist Vanna Beckman, with a focus on the larger issues of biologism and sociologism as they played out in the debate, a book which also described
888-403: A defined conformation . Proteins can interact with many types of molecules, including with other proteins , with lipids , with carbohydrates , and with DNA . It has been estimated that average-sized bacteria contain about 2 million proteins per cell (e.g. E. coli and Staphylococcus aureus ). Smaller bacteria, such as Mycoplasma or spirochetes contain fewer molecules, on
999-851: A detailed review of the vegetable proteins at the Connecticut Agricultural Experiment Station . Then, working with Lafayette Mendel and applying Liebig's law of the minimum , which states that growth is limited by the scarcest resource, to the feeding of laboratory rats, the nutritionally essential amino acids were established. The work was continued and communicated by William Cumming Rose . The difficulty in purifying proteins in large quantities made them very difficult for early protein biochemists to study. Hence, early studies focused on proteins that could be purified in large quantities, including those of blood, egg whites, and various toxins, as well as digestive and metabolic enzymes obtained from slaughterhouses. In
1110-420: A government institution that had failed to release the documents in accordance with the court order. In 2019, Gillberg and his colleagues became the subject of controversy again. They entered into a debate regarding sex-change . In an article in a major Swedish newspaper they argued with the help of the hypothesis Rapid Onset Gender Dysphoria , which lacks scientific support. In the 1970s, Gillberg played
1221-464: A group of children who had participated in a longitudinal psychiatric study done by Gillberg and other researchers, to two individuals under the Freedom of Information Act; this was done despite the researchers' assertion that anonymization was not considered feasible due to the nature and length of the study (a small group of participants had been followed for a period of 16 years and the data included
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#17328012093581332-583: A leading role in developing the concept Deficits in Attention, Motor control and Perception (DAMP), a concept primarily used in Scandinavia . The DAMP concept as used in more recent publications, refers to Attention-deficit hyperactivity disorder (ADHD) in combination with Developmental Coordination Disorder (DCD). According to Gillberg, it constitutes a "subgroup of the diagnostic category of ADHD, conceptually similar – but not clinically identical – to
1443-478: A little ambiguous and can overlap in meaning. Protein is generally used to refer to the complete biological molecule in a stable conformation , whereas peptide is generally reserved for a short amino acid oligomers often lacking a stable 3D structure. But the boundary between the two is not well defined and usually lies near 20–30 residues. Polypeptide can refer to any single linear chain of amino acids, usually regardless of length, but often implies an absence of
1554-538: A new act on ethical review of research involving humans was introduced. Changes were put in place in order to strengthen the protection for human subjects participating in medical research and to expand the scope of the ethical councils, while bringing the Swedish legislation closer to the European Commission directive. The official act governing medical research was further adjusted in 2008: ethical review
1665-410: A particular cell or cell type is known as its proteome . The chief characteristic of proteins that also allows their diverse set of functions is their ability to bind other molecules specifically and tightly. The region of the protein responsible for binding another molecule is known as the binding site and is often a depression or "pocket" on the molecular surface. This binding ability is mediated by
1776-500: A protein carries out its function: for example, enzyme kinetics studies explore the chemical mechanism of an enzyme's catalytic activity and its relative affinity for various possible substrate molecules. By contrast, in vivo experiments can provide information about the physiological role of a protein in the context of a cell or even a whole organism . In silico studies use computational methods to study proteins. Proteins may be purified from other cellular components using
1887-411: A protein is defined by the sequence of a gene, which is encoded in the genetic code . In general, the genetic code specifies 20 standard amino acids; but in certain organisms the genetic code can include selenocysteine and—in certain archaea — pyrrolysine . Shortly after or even during synthesis, the residues in a protein are often chemically modified by post-translational modification , which alters
1998-542: A protein that fold into distinct structural units. Domains usually also have specific functions, such as enzymatic activities (e.g. kinase ) or they serve as binding modules (e.g. the SH3 domain binds to proline-rich sequences in other proteins). Short amino acid sequences within proteins often act as recognition sites for other proteins. For instance, SH3 domains typically bind to short PxxP motifs (i.e. 2 prolines [P], separated by two unspecified amino acids [x], although
2109-486: A role in biological recognition phenomena involving cells and proteins. Receptors and hormones are highly specific binding proteins. Transmembrane proteins can also serve as ligand transport proteins that alter the permeability of the cell membrane to small molecules and ions. The membrane alone has a hydrophobic core through which polar or charged molecules cannot diffuse . Membrane proteins contain internal channels that allow such molecules to enter and exit
2220-406: A series of purification steps may be necessary to obtain protein sufficiently pure for laboratory applications. To simplify this process, genetic engineering is often used to add chemical features to proteins that make them easier to purify without affecting their structure or activity. Here, a "tag" consisting of a specific amino acid sequence, often a series of histidine residues (a " His-tag "),
2331-432: A solution known as a crude lysate . The resulting mixture can be purified using ultracentrifugation , which fractionates the various cellular components into fractions containing soluble proteins; membrane lipids and proteins; cellular organelles , and nucleic acids . Precipitation by a method known as salting out can concentrate the proteins from this lysate. Various types of chromatography are then used to isolate
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#17328012093582442-451: A specific 3D structure that determines its activity. A linear chain of amino acid residues is called a polypeptide . A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides . The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues. The sequence of amino acid residues in
2553-494: A strict anonymization encoding, even in extensive studies like Gillberg's which contain large amounts of clinical material collected over long periods of time, in spite of the increase in cost and the larger margins of error. Elisabeth Rynning, a professor of medical law at the University of Uppsala , questioned whether the court had been fully aware of the relevant laws. Access to these kinds of records may only be granted for
2664-403: A university administrator destroyed the 12–27 years old research material. In the legal aftermath, Gillberg and the rector of Gothenburg University were found guilty of "misuse of office" for not complying with the administrative court's decision. The two researchers (both chief physicians at Sahlgrenska University Hospital , one of them married to Gillberg), defended their decision to shred
2775-441: A variety of techniques such as ultracentrifugation , precipitation , electrophoresis , and chromatography ; the advent of genetic engineering has made possible a number of methods to facilitate purification. To perform in vitro analysis, a protein must be purified away from other cellular components. This process usually begins with cell lysis , in which a cell's membrane is disrupted and its internal contents released into
2886-432: A vast array of functions within organisms, including catalysing metabolic reactions , DNA replication , responding to stimuli , providing structure to cells and organisms , and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes , and which usually results in protein folding into
2997-538: A written agreement. They were convicted and fined for destruction of government property. In July 2005, the lower criminal court in Gothenburg upheld the right of Kärfve and Elinder to see any data from the Gothenburg study still held by the university. The court fined Gillberg for "misuse of office". In 2006, Gillberg lodged a complaint with the European Court of Human Rights (ECHR). On 17 June 2008,
3108-694: Is a "very real issue of how to deal with the conflict between splitting (ADHD plus developmental coordination disorder (DCD)) and lumping (DAMP)," he nevertheless feels that "the DAMP construct has been helpful in identifying a group of children with ADHD and multiple needs that will not be self evident if the diagnosis is just ADHD or just DCD." Before the Scandinavian studies, recognition that individuals with attention problems may also have difficulties with movement, perception, and memory had received little attention in studies. According to various studies, half of
3219-567: Is a professor of child and adolescent psychiatry at Gothenburg University in Gothenburg , Sweden . He has also been a visiting professor at the universities of Bergen , New York , Odense , St George's (University of London) , San Francisco , and Glasgow and Strathclyde . Gillberg is also known for the controversial Gothenburg Study of Children with DAMP , where Gillberg and his colleagues were subject to accusations of manipulating research data. During these events, Gillberg received
3330-474: Is also known for his role in a controversy relating to the confidentiality of medical records. The controversy involved public access under the Swedish Principle of Public Access ( offentlighetsprincipen ) to medical records and other personal data about a group of children participating in an early longitudinal study on ADHD /DAMP, commenced in 1977 at Gothenburg University. The docent (docent
3441-628: Is found in hard or filamentous structures such as hair , nails , feathers , hooves , and some animal shells . Some globular proteins can also play structural functions, for example, actin and tubulin are globular and soluble as monomers, but polymerize to form long, stiff fibers that make up the cytoskeleton , which allows the cell to maintain its shape and size. Other proteins that serve structural functions are motor proteins such as myosin , kinesin , and dynein , which are capable of generating mechanical forces. These proteins are crucial for cellular motility of single celled organisms and
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3552-469: Is higher in prokaryotes than eukaryotes and can reach up to 20 amino acids per second. The process of synthesizing a protein from an mRNA template is known as translation . The mRNA is loaded onto the ribosome and is read three nucleotides at a time by matching each codon to its base pairing anticodon located on a transfer RNA molecule, which carries the amino acid corresponding to the codon it recognizes. The enzyme aminoacyl tRNA synthetase "charges"
3663-461: Is inefficient for polypeptides longer than about 300 amino acids, and the synthesized proteins may not readily assume their native tertiary structure . Most chemical synthesis methods proceed from C-terminus to N-terminus, opposite the biological reaction. Most proteins fold into unique 3D structures. The shape into which a protein naturally folds is known as its native conformation . Although many proteins can fold unassisted, simply through
3774-510: Is now legally required in Sweden, the review committees have official status, and consent can be withdrawn by participants in medical research at any point. However, voices in the medical research community have raised concerns about law revisions' lack of attention to additional safeguards for researchers falsely accused of scientific misconduct and are calling for procedures that would ensure that scientific misconduct investigations are handled in
3885-404: Is often enormous—as much as 10 -fold increase in rate over the uncatalysed reaction in the case of orotate decarboxylase (78 million years without the enzyme, 18 milliseconds with the enzyme). The molecules bound and acted upon by enzymes are called substrates . Although enzymes can consist of hundreds of amino acids, it is usually only a small fraction of the residues that come in contact with
3996-535: Is the code for methionine . Because DNA contains four nucleotides, the total number of possible codons is 64; hence, there is some redundancy in the genetic code, with some amino acids specified by more than one codon. Genes encoded in DNA are first transcribed into pre- messenger RNA (mRNA) by proteins such as RNA polymerase . Most organisms then process the pre-mRNA (also known as a primary transcript ) using various forms of post-transcriptional modification to form
4107-541: Is the second highest grade in the Swedish academic system) of sociology Eva Kärfve and the pediatrician and general practitioner Leif Elinder who were critical of what they saw as scientific misconduct in Gillbergs research and questioned Gillberg's practices, had previously filed complaints that questioned the integrity of the study, invoked the Swedish Freedom of Information Act in order to gain access to
4218-623: The DSM -IV-TR. Some scholars have therefore criticized them for "making it difficult to compare with other studies." It has been argued that the failure of some research groups to replicate some of Gillberg's findings "may relate primarily to fundamental differences in diagnostic approach". Gillberg has received several awards for his research, including Protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues . Proteins perform
4329-464: The WHO concept of HKD ( hyperkinetic disorder )" and is diagnosed on the basis of "concomitant attention deficit/hyperactivity disorder and developmental coordination disorder in children who do not have severe learning disability or cerebral palsy". Some scholars disagree with the lumping of ADHD and DCD, with the argument that they are unrelated. Gillberg stated in 2003 that, although he feels that there
4440-492: The amino acid leucine for which he found a (nearly correct) molecular weight of 131 Da . Early nutritional scientists such as the German Carl von Voit believed that protein was the most important nutrient for maintaining the structure of the body, because it was generally believed that "flesh makes flesh." Around 1862, Karl Heinrich Ritthausen isolated the amino acid glutamic acid . Thomas Burr Osborne compiled
4551-644: The muscle sarcomere , with a molecular mass of almost 3,000 kDa and a total length of almost 27,000 amino acids. Short proteins can also be synthesized chemically by a family of methods known as peptide synthesis , which rely on organic synthesis techniques such as chemical ligation to produce peptides in high yield. Chemical synthesis allows for the introduction of non-natural amino acids into polypeptide chains, such as attachment of fluorescent probes to amino acid side chains. These methods are useful in laboratory biochemistry and cell biology , though generally not for commercial applications. Chemical synthesis
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4662-645: The sperm of many multicellular organisms which reproduce sexually . They also generate the forces exerted by contracting muscles and play essential roles in intracellular transport. A key question in molecular biology is how proteins evolve, i.e. how can mutations (or rather changes in amino acid sequence) lead to new structures and functions? Most amino acids in a protein can be changed without disrupting activity or function, as can be seen from numerous homologous proteins across species (as collected in specialized databases for protein families , e.g. PFAM ). In order to prevent dramatic consequences of mutations,
4773-497: The 1700s by Antoine Fourcroy and others, who often collectively called them " albumins ", or "albuminous materials" ( Eiweisskörper , in German). Gluten , for example, was first separated from wheat in published research around 1747, and later determined to exist in many plants. In 1789, Antoine Fourcroy recognized three distinct varieties of animal proteins: albumin , fibrin , and gelatin . Vegetable (plant) proteins studied in
4884-572: The 1950s, the Armour Hot Dog Company purified 1 kg of pure bovine pancreatic ribonuclease A and made it freely available to scientists; this gesture helped ribonuclease A become a major target for biochemical study for the following decades. The understanding of proteins as polypeptides , or chains of amino acids, came through the work of Franz Hofmeister and Hermann Emil Fischer in 1902. The central role of proteins as enzymes in living organisms that catalyzed reactions
4995-498: The 20,000 or so proteins encoded by the human genome, only 6,000 are detected in lymphoblastoid cells. Proteins are assembled from amino acids using information encoded in genes. Each protein has its own unique amino acid sequence that is specified by the nucleotide sequence of the gene encoding this protein. The genetic code is a set of three-nucleotide sets called codons and each three-nucleotide combination designates an amino acid, for example AUG ( adenine – uracil – guanine )
5106-815: The Department of Philosophy and the History of Technology at the Royal Institute of Technology (KTH), Stockholm, a former member of the Swedish Government Research Advisory Board, wrote: "[I]t is particularly interesting to note that the Court of Administrative Appeal nullified the decision by Gothenburg University to require individual consent and approval from an ethical review committee before giving access to sensitive data on individual research subjects. These are two of
5217-519: The EC number system provides a functional classification scheme. Similarly, the gene ontology classifies both genes and proteins by their biological and biochemical function, but also by their intracellular location. Sequence similarity is used to classify proteins both in terms of evolutionary and functional similarity. This may use either whole proteins or protein domains , especially in multi-domain proteins . Protein domains allow protein classification by
5328-498: The ECHR announced a "Decision to Communicate" in the case and a request for comment was submitted to the Swedish government, with a 15 October 2008 deadline for the initial response to the charges. The Swedish court's decision to grant the scholar Eva Kärfve and the pediatrician Leif Elinder access to the data to review it was controversial. When the study participants were contacted by Gillberg and asked if they would be prepared to have
5439-544: The Gillberg group of scientific misconduct. The accusations were investigated by the Ethics Council and dismissed. Elinder and Kärfve also demanded access to the original research material for the main DAMP studies. Under a section of the Swedish basic law that grants citizens access to government documents, Elinder and Kärfve were given full access to the documents by an administrative court. The university,
5550-472: The Gillberg group, and the participants of the study were strongly opposed to this decision, on the grounds that the material contained medical records and other sensitive information, and that the participants had been promised full confidentiality. A higher court decided that neither the participants, the researchers, nor their institution, were formally entitled to appeal the decision. When all legal avenues had been exhausted, two of Gillberg's coworkers and
5661-486: The Gothenburg study, has become the center of a heated controversy. The controversy concerns the question to what extent the Principle of Public Access , which in Sweden supports transparency in publicly funded activities, can be applied to sensitive data collected in medical studies involving human subjects. In 2003, Gothenburg University was ordered by the court to release medical records and other sensitive data about
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#17328012093585772-667: The Principle of Public Access is incompatible with promises of absolute confidentiality, and that the Central Ethical Review Board therefore no longer approves such promises. According to Martin Ingvar of the Karolinska Institute , medical researchers in Sweden will be forced to change the current practice because of the verdict. Ingvar told media that medical studies in Sweden must now adhere to
5883-706: The X-chromosome regions with autism. The 2003 breakthrough indicated the location of the mutation to be on the NLGN4 gene and the NGLN3 gene. The mutation prevents a complete protein from forming and is inherited from the mother. Since 2006, Gillberg is involved in a large cross-disciplinary project titled "Autism spectrum conditions: the Gothenburg collaborative studies", financed by the Swedish Research Council (Vetenskapsrådet), expected to run until
5994-709: The ability of many enzymes to bind and process multiple substrates . When mutations occur, the specificity of an enzyme can increase (or decrease) and thus its enzymatic activity. Thus, bacteria (or other organisms) can adapt to different food sources, including unnatural substrates such as plastic. Methods commonly used to study protein structure and function include immunohistochemistry , site-directed mutagenesis , X-ray crystallography , nuclear magnetic resonance and mass spectrometry . The activities and structures of proteins may be examined in vitro , in vivo , and in silico . In vitro studies of purified proteins in controlled environments are useful for learning how
6105-405: The addition of a single methyl group to a binding partner can sometimes suffice to nearly eliminate binding; for example, the aminoacyl tRNA synthetase specific to the amino acid valine discriminates against the very similar side chain of the amino acid isoleucine . Proteins can bind to other proteins as well as to small-molecule substrates. When proteins bind specifically to other copies of
6216-607: The alpha carbons are roughly coplanar . The other two dihedral angles in the peptide bond determine the local shape assumed by the protein backbone. The end with a free amino group is known as the N-terminus or amino terminus, whereas the end of the protein with a free carboxyl group is known as the C-terminus or carboxy terminus (the sequence of the protein is written from N-terminus to C-terminus, from left to right). The words protein , polypeptide, and peptide are
6327-531: The amino acid side chains in a protein that ultimately determines its three-dimensional structure and its chemical reactivity. The amino acids in a polypeptide chain are linked by peptide bonds . Once linked in the protein chain, an individual amino acid is called a residue, and the linked series of carbon, nitrogen, and oxygen atoms are known as the main chain or protein backbone. The peptide bond has two resonance forms that contribute some double-bond character and inhibit rotation around its axis, so that
6438-574: The binding of a substrate molecule to an enzyme's active site , or the physical region of the protein that participates in chemical catalysis. In solution, proteins also undergo variation in structure through thermal vibration and the collision with other molecules. Proteins can be informally divided into three main classes, which correlate with typical tertiary structures: globular proteins , fibrous proteins , and membrane proteins . Almost all globular proteins are soluble and many are enzymes. Fibrous proteins are often structural, such as collagen ,
6549-570: The body of a multicellular organism. These proteins must have a high binding affinity when their ligand is present in high concentrations, but must also release the ligand when it is present at low concentrations in the target tissues. The canonical example of a ligand-binding protein is haemoglobin , which transports oxygen from the lungs to other organs and tissues in all vertebrates and has close homologs in every biological kingdom . Lectins are sugar-binding proteins which are highly specific for their sugar moieties. Lectins typically play
6660-558: The cell is as enzymes , which catalyse chemical reactions. Enzymes are usually highly specific and accelerate only one or a few chemical reactions. Enzymes carry out most of the reactions involved in metabolism , as well as manipulating DNA in processes such as DNA replication , DNA repair , and transcription . Some enzymes act on other proteins to add or remove chemical groups in a process known as posttranslational modification. About 4,000 reactions are known to be catalysed by enzymes. The rate acceleration conferred by enzymatic catalysis
6771-436: The cell surface and an effector domain within the cell, which may have enzymatic activity or may undergo a conformational change detected by other proteins within the cell. Antibodies are protein components of an adaptive immune system whose main function is to bind antigens , or foreign substances in the body, and target them for destruction. Antibodies can be secreted into the extracellular environment or anchored in
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#17328012093586882-752: The cell's machinery through the process of protein turnover . A protein's lifespan is measured in terms of its half-life and covers a wide range. They can exist for minutes or years with an average lifespan of 1–2 days in mammalian cells. Abnormal or misfolded proteins are degraded more rapidly either due to being targeted for destruction or due to being unstable. Like other biological macromolecules such as polysaccharides and nucleic acids , proteins are essential parts of organisms and participate in virtually every process within cells . Many proteins are enzymes that catalyse biochemical reactions and are vital to metabolism . Proteins also have structural or mechanical functions, such as actin and myosin in muscle and
6993-450: The cell. Many ion channel proteins are specialized to select for only a particular ion; for example, potassium and sodium channels often discriminate for only one of the two ions. Structural proteins confer stiffness and rigidity to otherwise-fluid biological components. Most structural proteins are fibrous proteins ; for example, collagen and elastin are critical components of connective tissue such as cartilage , and keratin
7104-621: The chemical properties of their amino acids, others require the aid of molecular chaperones to fold into their native states. Biochemists often refer to four distinct aspects of a protein's structure: Proteins are not entirely rigid molecules. In addition to these levels of structure, proteins may shift between several related structures while they perform their functions. In the context of these functional rearrangements, these tertiary or quaternary structures are usually referred to as " conformations ", and transitions between them are called conformational changes. Such changes are often induced by
7215-441: The chief actors within the cell, said to be carrying out the duties specified by the information encoded in genes. With the exception of certain types of RNA , most other biological molecules are relatively inert elements upon which proteins act. Proteins make up half the dry weight of an Escherichia coli cell, whereas other macromolecules such as DNA and RNA make up only 3% and 20%, respectively. The set of proteins expressed in
7326-525: The children with ADHD also have DCD. With the development of the ADHD concept, the previous, less precise, category of Minimal Brain Dysfunction (MBD), "a term almost universally employed in child psychiatry and developmental paediatrics from the 1950s to the early 1980s" was replaced. Gillberg began to study DAMP in the late 1970s, when ADHD was still called MBD and the DAMP concept has been adjusted as
7437-490: The construction of enormously complex signaling networks. As interactions between proteins are reversible, and depend heavily on the availability of different groups of partner proteins to form aggregates that are capable to carry out discrete sets of function, study of the interactions between specific proteins is a key to understand important aspects of cellular function, and ultimately the properties that distinguish particular cell types. The best-known role of proteins in
7548-415: The cornerstones of the scientific community's own system for protecting research subjects." Beginning in 1996, pediatrician Leif Elinder criticized Gillberg's research and alleged that the numbers reported by Gillberg were made up. Elinder became associated with the sociologist Eva Kärfve at Lund University . They coordinated their criticism and Kärfve wrote a book, published in 2000, rejecting most of
7659-586: The court ruled that all files related to the study were to be released under the Principle of Public Access. Rather than breaking their promises of confidentiality to the participants, the two chief physicians, along with a university administrator, shredded the sensitive files of the study. The following year, Gillberg, as head of the university's Neuropsychiatric Department , and the University Vice-Chancellor were convicted and fined for "breach of duty" in their capacity as public officials at
7770-444: The data released, all but one family refused. Citing that, and the promise of confidentiality given to the participants as a precondition, Gillberg and the other researchers decided to not turn over the personal data. 267 Swedish doctors signed a letter in support of Gillberg's decision to not hand over the data. After the verdict, the chairman of the Central Ethical Review Board of Sweden, Johan Munch, said that in Swedish legislation,
7881-544: The data. Several participants had testified to the court that they would be deeply offended and hurt if Elinder and Kärfve could read their medical records. The Swedish Parliamentary Ombudsman also investigated the affair. In the 18-page summary dedicated to the case in the yearly report by the Ombudsman , Gillberg and Gothenburg University are criticized for violating the Freedom of Information Act and thus Kärfve's and Elinder's civil right to access to records belonging to
7992-408: The derivative unit kilodalton (kDa). The average size of a protein increases from Archaea to Bacteria to Eukaryote (283, 311, 438 residues and 31, 34, 49 kDa respectively) due to a bigger number of protein domains constituting proteins in higher organisms. For instance, yeast proteins are on average 466 amino acids long and 53 kDa in mass. The largest known proteins are the titins , a component of
8103-477: The end of 2009. The project is a collaboration between scientists specialized in child and youth psychiatry , molecular biology and neuroscience and involves a genetic part with an international study team of French, British and U.S. researchers examining various aspects autism. Some of the results were published during 2007. The project also includes a genetic study on the Faroe Islands . Gillberg
8214-451: The erroneous conclusion that they might be composed of a single type of (very large) molecule. The term "protein" to describe these molecules was proposed by Mulder's associate Berzelius; protein is derived from the Greek word πρώτειος ( proteios ), meaning "primary", "in the lead", or "standing in front", + -in . Mulder went on to identify the products of protein degradation such as
8325-496: The ethical review committee, and each concerned individual would have to consent before documents about her or him could be read by Eva Kärfve and Leif Elinder , the other person who had requested access. However, Kärfve and Elinder appealed the university's conditions and the Administrative Court of Appeal ruled that the conditions were unreasonable. In an analysis of the case, Sven Ove Hansson, professor and head of
8436-420: The files by referring to the promises of confidentiality that had been issued to the subjects of the study and the letters of objection that had been received from the families that they did not want their personal data used or shared with the private individuals. They argued that turning the files over would have exposed the researchers and the university to potential lawsuits from the subjects for failing to honor
8547-582: The first precisely identified genetic mutations in individuals with autism . The team identified mutations altering two genes on the X chromosome which seem to be implicated in the formation of synapses (communication spaces between neurons ), in two families where several members are affected. Previous studies, such as the Paris Autism Research International Sib-Pair Study (PARIS), coordinated by Gillberg and Marion Leboyer, have more generally associated
8658-430: The general population of school age children; another few per cent are affected by more moderate variants. Boys are overrepresented; girls are currently probably underdiagnosed. There are many overlapping conditions, including conduct disorder, depression/anxiety, and academic failure. There is a strong link with autism spectrum disorders in severe DAMP. Familial factors and pre- and perinatal risk factors account for much of
8769-492: The ideological battle against research in psychology and psychiatry driven by various religious groups. In April 2008, a hotly debated television documentary aired on Swedish television, where Kärfve and Erlinder returned to the spotlight to air their concerns about the shredding of the documents. However, the program was shut down in 2008 after the Board of Appeal condemned it for its lack of impartiality in relation to
8880-479: The late 1700s and early 1800s included gluten , plant albumin , gliadin , and legumin . Proteins were first described by the Dutch chemist Gerardus Johannes Mulder and named by the Swedish chemist Jöns Jacob Berzelius in 1838. Mulder carried out elemental analysis of common proteins and found that nearly all proteins had the same empirical formula , C 400 H 620 N 100 O 120 P 1 S 1 . He came to
8991-478: The major component of connective tissue, or keratin , the protein component of hair and nails. Membrane proteins often serve as receptors or provide channels for polar or charged molecules to pass through the cell membrane . A special case of intramolecular hydrogen bonds within proteins, poorly shielded from water attack and hence promoting their own dehydration , are called dehydrons . Many proteins are composed of several protein domains , i.e. segments of
9102-443: The mature mRNA, which is then used as a template for protein synthesis by the ribosome . In prokaryotes the mRNA may either be used as soon as it is produced, or be bound by a ribosome after having moved away from the nucleoid . In contrast, eukaryotes make mRNA in the cell nucleus and then translocate it across the nuclear membrane into the cytoplasm , where protein synthesis then takes place. The rate of protein synthesis
9213-405: The membranes of specialized B cells known as plasma cells . Whereas enzymes are limited in their binding affinity for their substrates by the necessity of conducting their reaction, antibodies have no such constraints. An antibody's binding affinity to its target is extraordinarily high. Many ligand transport proteins bind particular small biomolecules and transport them to other locations in
9324-496: The nobel prize in 1972, solidified the thermodynamic hypothesis of protein folding, according to which the folded form of a protein represents its free energy minimum. With the development of X-ray crystallography , it became possible to determine protein structures as well as their sequences. The first protein structures to be solved were hemoglobin by Max Perutz and myoglobin by John Kendrew , in 1958. The use of computers and increasing computing power also supported
9435-500: The order of 50,000 to 1 million. By contrast, eukaryotic cells are larger and thus contain much more protein. For instance, yeast cells have been estimated to contain about 50 million proteins and human cells on the order of 1 to 3 billion. The concentration of individual protein copies ranges from a few molecules per cell up to 20 million. Not all genes coding proteins are expressed in most cells and their number depends on, for example, cell type and external stimuli. For instance, of
9546-677: The participants in the study and their next-of-kin", the Swedish Parliamentary Ombudsman stated that "the international declarations drawn up by the World Medical Association and also the European Convention [...] do not categorise them as undertakings that can be considered to take priority over Swedish law." The Parliamentary Ombudsman also stated that, "it is not possible to make decisions on issues concerning confidentiality until
9657-440: The physical and chemical properties, folding, stability, activity, and ultimately, the function of the proteins. Some proteins have non-peptide groups attached, which can be called prosthetic groups or cofactors . Proteins can also work together to achieve a particular function, and they often associate to form stable protein complexes . Once formed, proteins only exist for a certain period and are then degraded and recycled by
9768-424: The process of cell signaling and signal transduction . Some proteins, such as insulin , are extracellular proteins that transmit a signal from the cell in which they were synthesized to other cells in distant tissues . Others are membrane proteins that act as receptors whose main function is to bind a signaling molecule and induce a biochemical response in the cell. Many receptors have a binding site exposed on
9879-534: The protein or proteins of interest based on properties such as molecular weight, net charge and binding affinity. The level of purification can be monitored using various types of gel electrophoresis if the desired protein's molecular weight and isoelectric point are known, by spectroscopy if the protein has distinguishable spectroscopic features, or by enzyme assays if the protein has enzymatic activity. Additionally, proteins can be isolated according to their charge using electrofocusing . For natural proteins,
9990-427: The proteins in the cytoskeleton , which form a system of scaffolding that maintains cell shape. Other proteins are important in cell signaling, immune responses , cell adhesion , and the cell cycle . In animals, proteins are needed in the diet to provide the essential amino acids that cannot be synthesized . Digestion breaks the proteins down for metabolic use. Proteins have been studied and recognized since
10101-415: The purpose of research or for the collection of statistics. Elinder had not stated any such purpose in his application, and Kärfve had only argued that the material would be useful for her research, not that it would actually be used in a research project. She was in fact not allowed to use the material in her research project, since that would have required a previous approval by an ethics committee. There
10212-453: The raw data of the study after their fraud allegations had been investigated and officially dismissed by the regional ethics committee . Gillberg and two chief physicians involved in the study stated that medical ethics principles prevented them from turning over sensitive personal and medical data as the participants' parents had been promised confidentiality in writing before giving informed consent on behalf of their children. However,
10323-439: The release of a document is requested. It follows therefore that the assurances of confidentiality cited above cannot take priority over the law as it stands or a court's application of the statutes". In 2003, a bill was introduced in the Swedish parliament, Riksdagen , due to the secrecy issues raised during the trial that granted the two private individuals access to sensitive personal data. This bill did not pass, but in 2004,
10434-465: The research on DAMP, and especially Gillberg's. Other psychiatrists and neuroscientists in Sweden defended the Gillberg group and argued that Elinder and Kärfve had crossed the line from scientific criticism to personal attacks and vilification. However, Kärfve called this an attempt to cover up fraudulent research practices. The conflict escalated further in 2002, when Kärfve and Elinder wrote separate letters to Gothenburg University , formally accusing
10545-452: The said programme. The program was critiqued for being one sided. This was due to that Gillberg and his colleagues refused to participate in the program. Which meant that the journalists only had access to one side of the conflict and had to make due with what they got. In an attempt to mitigate the problematic situation Gillberg and his colleagues was also given two other opportunities after the program had aired to be able to give their side of
10656-582: The same molecule, they can oligomerize to form fibrils; this process occurs often in structural proteins that consist of globular monomers that self-associate to form rigid fibers. Protein–protein interactions also regulate enzymatic activity, control progression through the cell cycle , and allow the assembly of large protein complexes that carry out many closely related reactions with a common biological function. Proteins can also bind to, or even be integrated into, cell membranes. The ability of binding partners to induce conformational changes in proteins allows
10767-581: The sample, allowing scientists to obtain more information and analyze larger structures. Computational protein structure prediction of small protein structural domains has also helped researchers to approach atomic-level resolution of protein structures. As of April 2024 , the Protein Data Bank contains 181,018 X-ray, 19,809 EM and 12,697 NMR protein structures. Proteins are primarily classified by sequence and structure, although other classifications are commonly used. Especially for enzymes
10878-430: The sequencing of complex proteins. In 1999, Roger Kornberg succeeded in sequencing the highly complex structure of RNA polymerase using high intensity X-rays from synchrotrons . Since then, cryo-electron microscopy (cryo-EM) of large macromolecular assemblies has been developed. Cryo-EM uses protein samples that are frozen rather than crystals, and beams of electrons rather than X-rays. It causes less damage to
10989-538: The state. Both the lower court and the appeal court were unanimous in finding Gillberg guilty of breach of duty arising from failure to comply in regards to the release of documents; additionally, the Supreme Court of Sweden did not agree to retry Gillberg's breach of duty case. In response to the concerns raised by Gillberg at the trial that a situation had arisen for him whereby "he was prevented by medical ethics and research ethics from disclosing information about
11100-427: The story through an interview, but they decided not to participate again. In 1989, Gillberg became instrumental in the publication of the first diagnostic criteria for Asperger syndrome . They are applied in clinical practice due to the adhesion to the original description of Hans Asperger . All of the following six criteria must be met for confirmation of diagnosis: Gillberg's criteria differ from those given in
11211-405: The substrate, and an even smaller fraction—three to four residues on average—that are directly involved in catalysis. The region of the enzyme that binds the substrate and contains the catalytic residues is known as the active site . Dirigent proteins are members of a class of proteins that dictate the stereochemistry of a compound synthesized by other enzymes. Many proteins are involved in
11322-716: The surrounding amino acids may determine the exact binding specificity). Many such motifs has been collected in the Eukaryotic Linear Motif (ELM) database. Topology of a protein describes the entanglement of the backbone and the arrangement of contacts within the folded chain. Two theoretical frameworks of knot theory and Circuit topology have been applied to characterise protein topology. Being able to describe protein topology opens up new pathways for protein engineering and pharmaceutical development, and adds to our understanding of protein misfolding diseases such as neuromuscular disorders and cancer. Proteins are
11433-400: The tRNA molecules with the correct amino acids. The growing polypeptide is often termed the nascent chain . Proteins are always biosynthesized from N-terminus to C-terminus . The size of a synthesized protein can be measured by the number of amino acids it contains and by its total molecular mass , which is normally reported in units of daltons (synonymous with atomic mass units ), or
11544-535: The term ADHD was introduced and became internationally used. Around 1990, DAMP had become a generally accepted diagnostic concept in two Nordic countries , but when the DSM-IV appeared in 1994, DAMP became considered a redundant term in many countries, since DAMP is essentially equivalent to ADHD in combination with DCD as defined by DSM-IV . Gillberg's four criteria for DAMP are: According to Gillberg, clinically severe form DAMP (or ADHD+DCD) affects about 1.5% of
11655-472: The tertiary structure of the protein, which defines the binding site pocket, and by the chemical properties of the surrounding amino acids' side chains. Protein binding can be extraordinarily tight and specific; for example, the ribonuclease inhibitor protein binds to human angiogenin with a sub-femtomolar dissociation constant (<10 M) but does not bind at all to its amphibian homolog onconase (> 1 M). Extremely minor chemical changes such as
11766-591: The title Gillberg . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Gillberg&oldid=1092929911 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Christopher Gillberg Lars Christopher Gillberg (born 19 April 1950), who has sometimes published as Gillberg and Gillberg with his wife Carina Gillberg,
11877-438: The variance. Psychosocial risk factors appear to increase the risk of marked psychiatric abnormality in DAMP. Outcome in early adult age was psychosocially poor in one study in almost 60% of unmedicated cases. About half of all cases with ADHD have DCD, and conversely, ADHD occurs in about half of all cases of DCD. Gillberg has published around 80 papers on DAMP, ADHD and related conditions. One of Gillberg's research projects,
11988-472: Was insulin , by Frederick Sanger , in 1949. Sanger correctly determined the amino acid sequence of insulin, thus conclusively demonstrating that proteins consisted of linear polymers of amino acids rather than branched chains, colloids , or cyclols . He won the Nobel Prize for this achievement in 1958. Christian Anfinsen 's studies of the oxidative folding process of ribonuclease A, for which he won
12099-436: Was also the problem that Elinder and Kärfve requested the material as private citizens, while at the same time stating that they needed it in their professional capacities. If they had requested the material as representatives of their employers, the court would not have jurisdiction. Finally Rynning questioned how the court could decide that no one would be hurt, as the law requires, if Elinder and Kärfve were given full access to
12210-581: Was not fully appreciated until 1926, when James B. Sumner showed that the enzyme urease was in fact a protein. Linus Pauling is credited with the successful prediction of regular protein secondary structures based on hydrogen bonding , an idea first put forth by William Astbury in 1933. Later work by Walter Kauzmann on denaturation , based partly on previous studies by Kaj Linderstrøm-Lang , contributed an understanding of protein folding and structure mediated by hydrophobic interactions . The first protein to have its amino acid chain sequenced
12321-609: Was widely covered in the media. Gillberg is also the founding editor of the journal European Child & Adolescent Psychiatry . In the early 1980s, the concept of an ' autism spectrum ' was introduced by Lorna Wing and Gillberg. Gillberg has done extensive research into autism throughout his academic career. In 2003, a French and Swedish research team at the Institut Pasteur and the psychiatric departments at Gothenburg University and University of Paris , led by Thomas Bourgeron , Marion Leboyer and Gillberg, discovered
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