Proteinogenic aminoacid Pp move indef Image AminoAcidball.svg thumbnail 200px The generic structure of an alpha aminoacid in its unionized form Image Amino Acids.svg thumb upright 2.0 right alt Table ... acid group, and a side chain side chain that is specific to each aminoacid. The key elements of an amino ..., where the term usually refers to alpha amino acids . An alpha aminoacid has the generic Chemical ... chain and is known as an imino acid it falls under the category of special structured amino acids ... carbon carbon . Other types of aminoacid exist when the amino group is attached to a different carbon atom for example, in gamma amino acids such as gamma amino butyric acid the carbon atom ... are called Aminoacid In human nutrition essential for humans because they cannot be created from ... isolated a compound in asparagus that proved to be asparagine , the first aminoacid to be discovered ... 99, 103 publisher Academic Press location New York isbn 978 0 12 034226 6 ref Another aminoacid ... General structure see Proteinogenic aminoacid Image Lysine fisher struct num.png thumb right Lysine ... at the top of the page, R represents a side chain specific to each aminoacid. The carbon atom next ... an aminoacid a weak acid or a weak base weak basic chemistry base , and a hydrophile if the side ... fully in the article on these proteinogenic aminoacid s. The phrase branched chain amino acids or BCAA ... , and valine . Proline is the only proteinogenic aminoacid whose side group links to the amino group and, thus, is also the only proteinogenic aminoacid containing a secondary amine at this position ... as an aminoacid in the current biochemical nomenclature, ref Cite book editor1 first Claude editor1 ... aminoacid . ref Cite book first Anthony D. last Smith title Oxford dictionary of biochemistry and molecular ... acid configuration refers not to the optical activity of the aminoacid itself, but rather to the optical activity of the isomer of glyceraldehyde from which that aminoacid can, in theory, be synthesized ... more details
A ketogenic aminoacid is an aminoacid that can be converted into ketone bodies through ketogenesis . This is in contrast to the glucogenic aminoacid s, which are converted into glucose . Ketogenic amino acids are unable to be converted to glucose as both carbon atoms in the ketone body are ultimately degraded to carbon dioxide in the citric acid cycle . In humans, two amino acids are exclusively ketogenic leucine lysine In humans, five amino acids are both ketogenic and glucogenic isoleucine phenylalanine tryptophan tyrosine threonine See also List of standard amino acids Glucogenic aminoacid Ketogenesis Metabolism External links http web.indstate.edu thcme mwking aminoacid metabolism.html Aminoacid metabolism http www.ncbi.nlm.nih.gov books bv.fcgi?rid stryer.chapter.3193 Chapter on Aminoacid catabolism in Biochemistry by Jeremy Berg, John Tymoczko, Lubert Stryer. Fourth ed. by Lubert Stryer. ISBN 0 7167 4955 6 Accessed 2007 03 17 http www.dentistry.leeds.ac.uk biochem thcme aminoacidmetabolism.pdf Aminoacid metabolism AminoAcids biochem stub Category Ketogenic amino acids Category Nitrogen metabolism fr Acide amin c toformateur gl Amino cido cetox nico ja fi Ketogeeninen aminohappo zh ... more details
A excitatory aminoacid agonist is a pharmacological agent which acts to increase the stimulation of receptors for excitatory amino acids primarily glutamate . ref MeshName Excitatory aminoacid agonists ref Examples include avermectin ibotenic acid kainic acid n methylaspartate quisqualic acid External links MeshPharmaList 82018690 References reflist Receptor agonists and antagonists Category Amino acids nervous system drug stub ... more details
pmc 2727006 ref Applications Data from the geochronological analysis of aminoacid racemization has ... ref or an objet d art to determine authenticity. Procedure Aminoacid racemization analysis consists of sample preparation, isolation of the aminoacid wanted, and measure of its D L ratio. Sample preparation ...Aminoacid dating is a Dating methodology archaeology dating technique used to estimate the age of a specimen ... fields. This technique relates changes in aminoacid molecules to the time elapsed since they were formed. Principle All biological tissues contain aminoacid s. All amino acids except glycine the simplest ... affecting racemization The rate at which racemization proceeds depends on the type of aminoacid and on the average ... of racemization. These effects restrict aminoacid chronologies to materials with known environmental ... and technologists accumulate data. These are important for aminoacid dating because racemization occurs ... or D L ratio . This aminoacid ratio has the advantages of being relatively easy to measure and being ... doi 10.1016 S0277 3791 97 00086 3 title A new procedure for determining dl aminoacid ratios in fossils ... in AminoAcid and Protein Geochemistry Oxford University Press, New York, 145 160. ref ref http jan.ucc.nau.edu ... Archaeological Applications of AminoAcid Racemization issue 2 ref Stratigraphy , oceanography , paleogeography ... 0277 3791 87 90016 3 title The precision of aminoacid geochronology and paleothermometry ref ref cite ... 892 903 display authors 1 doi 10.1130 0016 7606 1996 108 0892 AAEOLT 2.3.CO 2 title Aminoacid ... from aminoacid racemization in emu eggshells last2 Magee first2 John W. last3 Jull first3 A. J ... volume 22 pages 899 914 doi 10.1016 S0277 3791 03 00006 4 title Aminoacid paleothermometry of Quaternary ... by aminoacid racemization and vice versa has occurred. ref cite journal author McMenamin, M.A.S. year 1982 title Aminoacid geochemistry of fossil bones from the Rancho La Brea Asphalt Deposit ... of age of living animals. Aminoacid racemization also has a role in tissue and protein ... more details
A glucogenic aminoacid is an aminoacid that can be converted into glucose through gluconeogenesis . ref cite journal author Brosnan J title Interorgan aminoacid transport and its regulation url http jn.nutrition.org cgi content full 133 6 2068S journal J Nuitr volume 133 issue 6 Suppl 1 pages 2068S 2072S date 1 June 2003 pmid 12771367 ref ref cite journal author Young V, Ajami A title Glutamine the emperor or his clothes? url http jn.nutrition.org cgi content full 131 9 2449S journal J Nutr volume 131 issue 9 Suppl pages 2449S 59S discussion 2486S 7S date 1 September 2001 pmid 11533293 ref This is in contrast to the ketogenic aminoacid s, which are converted into ketone bodies . The production of glucose from glucogenic amino acids involves these amino acids being converted to alpha keto acids and then to glucose, with both processes occurring in the liver. This mechanism predominates during catabolysis , rising as fasting and starvation increase in severity. In humans, the glucogenic amino acids are Glycine Serine Valine Histidine Arginine Cysteine Proline Alanine Glutamate Glutamine Aspartate Asparagine Methionine Amino acids that are both glucogenic and ketogenic Isoleucine Threonine Phenylalanine Tyrosine Tryptophan Only leucine and lysine are not glucogenic. See also List of standard amino acids Glycolysis Ketogenic aminoacid Metabolism References Reflist External links http themedicalbiochemistrypage.org aminoacid metabolism.html Aminoacid metabolism http www.ncbi.nlm.nih.gov books bv.fcgi?rid stryer.chapter.3193 Chapter on Aminoacid catabolism in Biochemistry by Jeremy Berg, John Tymoczko, Lubert Stryer. Fourth ed. by Lubert Stryer. ISBN 0 7167 4955 6 Accessed 2007 03 17 http www.dentistry.leeds.ac.uk biochem thcme aminoacidmetabolism.pdf Aminoacid metabolism AminoAcids DEFAULTSORT Glucogenic AminoAcid Category Amino acids Category Glucogenic amino acids Category Nitrogen metabolism biochem stub el fr Acide amin glucoformateur gl ... more details
orphan date December 2009 Merge Aminoacid date December 2009 Merge Protein biosynthesis date October 2011 Unreferenced date December 2009 Aminoacid activation refers to the attachment of an aminoacid to its Transfer RNA tRNA . Aminoacyltransferases Aminoacyl transferase binds Adenosine triphosphate ATP to aminoacid. Aminoacyl transferase binds ATP aminoacid to tRNA. The ATP is used in this step. AminoAcid Activation During aminoacid activation the amino acids aa are attached to their corresponding tRNA. The coupling reactions are catalysed by a group of enzymes called aminoacyl tRNA synthetases named after the reaction product aminoacyl tRNA or aa tRNA . The coupling reaction proceeds in two steps 1. aa ATP aa AMP PP, pyrophosphate 2. aa AMP tRNA aa tRNA AMP The aminoacid is coupled to the penultimate nucleotide at the 3 end of the tRNA the A in the sequence CCA via an ester bond roll over in illustration . The formation of the ester bond conserves a considerable part of the energy from the activation reaction. This stored energy provides the majority of the energy needed for peptide bond formation during translation. Each of the 20 amino acids are recognised by its specific aminoacyl tRNA synthetase. The synthetases are usually composed of one to four protein subunits. The enzymes vary considerably in structure although they all perform the same type of reaction by binding ATP, one specific aminoacid and its corresponding tRNA. The specificity of the aminoacid activation is as critical for the translational accuracy as the correct matching of the codon with the anticodon. The reason is that the ribosome only sees the anticodon of the tRNA during translation. Thus ... amino acids. The error frequency of the aminoacid activation reaction is approximately 1 in 10 000 despite the small structural differences between some of the amino acids. Category Acidic amino acids biochem stub ... more details
Infobox Disease Name Aminoacid transport disorder Image Caption DiseasesDB ICD10 ICD10 E 72 0 e 70 ICD9 ICD9 270 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D020157 Aminoacid transport disorders are medical conditions associated with a failure of aminoacid s to be absorbed from the kidney or intestine . An example is Hartnup disease . External links cite journal doi 10.1136 jcp.s3 5.1.41 author Milne MD title Disorders of intestinal aminoacid transport journal J Clin Pathol volume 5 issue Suppl pages 41 4 year 1971 pmc 1176258 Aminoacid metabolic pathology Category Aminoacid metabolism disorders disease stub ... more details
orphan date January 2010 enzyme Name alpha aminoacid esterase EC number 3.1.1.43 CAS number 74506 40 4 IUBMB EC number 3 1 1 43 GO code 0047658 image width caption In enzymology , an alpha aminoacid esterase EC number 3.1.1.43 is an enzyme that catalysis catalyzes the chemical reaction an alpha aminoacid ester H sub 2 sub O math rightleftharpoons math an alpha aminoacid an alcohol Thus, the two substrate biochemistry substrates of this enzyme are alpha aminoacid ester and water H sub 2 sub O , whereas its two product chemistry products are alpha aminoacid and alcohol . This enzyme belongs to the family of hydrolase s, specifically those acting on carboxylic ester bonds. The systematic name of this enzyme class is alpha aminoacid ester aminoacylhydrolase . This enzyme is also called alpha aminoacid ester hydrolase . Structural studies As of late 2007, 5 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 1MPX , PDB link 1NX9 , PDB link 1RYY , PDB link 2B4K , and PDB link 2B9V . References reflist 1 cite journal author Kato K, Kawahara K, Takahashi T and Kakinuma A date 1980 title Purification of an alpha aminoacid ester hydrolase from Xanthomonas citri journal Agric. Biol. Chem. volume 44 pages 1069&ndash 1074 cite journal author Kato K, Kawahara K, Takahashi T and Kakinuma A date 1980 title Substrate specificity of an alpha aminoacid ester hydrolase from Xanthomonas citri journal Agric. Biol. Chem. volume 44 pages 1075&ndash 1081 cite journal author Takahashi T, Yamazaki Y, Kato K date 1974 title Substrate specificity of an alpha aminoacid ester hydrolase produced by Acetobacter turbidans A.T.C.C. 9325 journal Biochem. J. volume 137 pages 497&ndash 503 pmid 4424889 issue 3 pmc 1166149 Category EC 3.1.1 Category Enzymes of known structure hydrolase stub ... more details
Aminoacid oxidoreductases are oxidoreductases , a type of enzyme, that act upon amino acids . They constitute the majority of enzymes classified under Enzyme Commission number EC number 1.4, with most of the remainder being monoamine oxidase s. Examples include Glutamate dehydrogenase Nitric oxide synthase External links MeshName AminoAcid Oxidoreductases enzyme stub CH NH2 oxidoreductases Category Oxidoreductases ... more details
pathway of aspartate family Aminoacid Chemical properties aminoacid s has been studied ... into either the storage aminoacid asparagine or aspartate family amino acids may be subject ... more details
enzyme Name aminoacid racemase EC number 5.1.1.10 CAS number 9068 61 5 IUBMB EC number 5 1 1 10 GO code 0047661 image width caption In enzymology , an aminoacid racemase EC number 5.1.1.10 is an enzyme that catalysis catalyzes the chemical reaction an L aminoacid math rightleftharpoons math a D aminoacid Hence, this enzyme has one substrate biochemistry substrate , L aminoacid , and one product chemistry product , D aminoacid . This enzyme belongs to the family of isomerase s, specifically those racemase s and epimerase s acting on aminoacid s and derivatives. The systematic name of this enzyme class is aminoacid racemase . This enzyme is also called L aminoacid racemase . This enzyme participates in 4 metabolism metabolic pathways glycine , serine and threonine metabolism, cysteine metabolism, D glutamine and D glutamate metabolism, and D arginine and D ornithine metabolism. It employs one cofactor biochemistry cofactor , pyridoxal phosphate . Structural studies As of late 2007, 5 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 2FKP , PDB link 2GGG , PDB link 2GGH , PDB link 2GGI , and PDB link 2GGJ . References reflist 1 cite journal author Soda K, Osumi T date 1969 title Crystalline aminoacid racemase with low substrate specificity journal Biochem. Biophys. Res. Commun. volume 35 pages 363&ndash 8 pmid 5788493 doi 10.1016 0006 291X 69 90507 5 issue 3 isomerase stub Racemases and epimerases Category EC 5.1.1 Category Pyridoxal phosphate enzymes Category Enzymes of known structure ja ... more details
Context date June 2010 POV date June 2010 Pseudo aminoacid composition , or PseAA composition , was originally ... author Chou KC title Prediction of protein cellular attributes using pseudo aminoacid composition journal ... for a protein sample is its entire aminoacid AA sequence, which can contain its most complete ... the aminoacid composition AAC to represent protein samples, as formulated as follows. Given a protein sequence P with math L math aminoacid residues, i.e., math mathbf P begin bmatrix mbox R ... acids in P , and T the transposing operator. Accordingly, the aminoacid composition of a protein can ... chou1 In contrast with the conventional aminoacid composition that contains 20 components with each ... Chen title Pseudo aminoacid composition and its applications in bioinformatics, proteomics and system ... q math th function of the aminoacid math mbox R i , math , and math Gamma , math the total number ... right math and math Phi 3 left mbox R i 1 right math the corresponding values for the aminoacid math ... name pmid15308540 cite journal author Chou KC title Using amphiphilic pseudo aminoacid composition ... G title A novel feature representation method based on Chou s pseudo aminoacid composition for protein ... aminoacid composition and support vector machine fusion network journal Anal. Biochem. volume ... aminoacid composition and support vector machine to predict protein structural class journal J. Theor ... ref ref name pmid17330882 cite journal author Lin H, Li QZ title Using pseudo aminoacid ... of protein structural classes by Chou s pseudo aminoacid composition approached using continuous wavelet transform and principal component analysis journal Amino Acids volume 37 issue 2 pages 415 ... Using the concept of Chou s pseudo aminoacid composition to predict enzyme family classes an approach ... s pseudo aminoacid composition and support vector machine journal J. Theor. Biol. volume 281 issue ... protein folding rates using the concept of Chou s pseudo aminoacid composition journal J Comput ... more details
An aminoacid based formula , also known as an elemental formula , is a type of hypoallergenic infant formula made from individual amino acids . Amino acids are the building blocks of protein and together they form the protein requirements in formula needed for growth and development. The amino acids are in the simplest form, making it easy for the body to process and digest. Because infants and children have different nutritional needs, aminoacid based formulas are typically formulated either for infants 0 1 years of age or for children 1 10 years of age. Indications Aminoacid based formulas are most commonly indicated for Milk or soy protein allergy Multiple food protein intolerance Food protein allergy induced Eosinophilic esophagitis and Gastroesophageal reflux disease Other medical conditions requiring an aminoacid based diet, such as Short bowel syndrome and Transition from parenteral to enteral nutrition Reimbursement br Unlike milk based, soy based, and hydrolysate formulas, aminoacid based formulas fall under the FDA classification of exempt infant formulas or medical foods. Therefore, 11 states currently require that insurance companies reimburse families for aminoacid based formulas. The states are Arizona, Connecticut, Illinois, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Jersey, New York, and Rhode Island. The details of each law are different. Some families may also qualify for Special Supplemental Nutrition Program for Women, Infants and Children WIC or private assistance programs. See also Milk allergy Food allergy Category Infant feeding Category Aminoacid derivatives Orphan date July 2009 ... more details
enzyme Name aromatic aminoacid transaminase EC number 2.6.1.57 CAS number 37332 38 0 IUBMB EC number 2 6 1 57 GO code 0008793 image width caption In enzymology , an aromatic aminoacid transaminase EC number 2.6.1.57 is an enzyme that catalysis catalyzes the chemical reaction an aromatic aminoacid 2 oxoglutarate math rightleftharpoons math an aromatic oxo acid L glutamate Thus, the two substrate biochemistry substrates of this enzyme are aromatic aminoacid and 2 oxoglutarate , whereas its two product chemistry products are aromatic oxo acid and L glutamate . This enzyme belongs to the family of transferase s, specifically the transaminases , which transfer nitrogenous groups. The systematic name of this enzyme class is aromatic aminoacid 2 oxoglutarate aminotransferase . Other names in common use include aromatic aminoacid aminotransferase , aromatic aminotransferase , and ArAT . This enzyme participates in 6 metabolism metabolic pathways methionine metabolism , tyrosine metabolism , phenylalanine metabolism , phenylalanine, tyrosine and tryptophan biosynthesis , novobiocin biosynthesis , and alkaloid biosynthesis i . It employs one cofactor biochemistry cofactor , pyridoxal phosphate . Structural studies As of late 2007, 13 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 1AY4 , PDB link 1AY5 , PDB link 1AY8 , PDB link 2AY1 , PDB link 2AY2 , PDB link 2AY3 , PDB link 2AY4 , PDB link 2AY5 , PDB link 2AY6 , PDB link 2AY7 , PDB link 2AY8 , PDB link 2AY9 , and PDB link 3TAT . References reflist 1 cite journal author Mavrides C, Orr W date 1975 title Multispecific aspartate and aromatic aminoacid aminotransferases in Escherichia coli journal J. Biol. Chem. volume 250 pages 4128&ndash 33 pmid 236311 issue 11 transferase stub Category EC 2.6.1 Category Pyridoxal phosphate enzymes Category Enzymes of known structure ... more details
enzyme Name D aminoacid oxidase EC number 1.4.3.3 CAS number 9000 88 8 IUBMB EC number 1 4 3 3 GO code 0003884 image width caption protein Name D aminoacid oxidase caption image 1c0p DAAO dimer.jpg width HGNCid 2671 Symbol DAO DAAO AltSymbols EntrezGene 1610 OMIM 124050 RefSeq NM 001917 UniProt P14920 PDB ECnumber 1.4.3.3 Chromosome 12 Arm q Band 24 LocusSupplementaryData D aminoacid oxidase DAAO also DAO, OXDA, DAMOX is a peroxisomal enzyme containing FAD as cofactor that is expressed in a wide range of species from yeasts to human. ref name pmid17396222 cite journal author Pollegioni L, Piubelli L, Sacchi S, Pilone MS, Molla G title Physiological functions of D aminoacid oxidases from yeast to humans journal Cell. Mol. Life Sci. volume 64 issue 11 pages 1373 94 year 2007 month June pmid 17396222 doi 10.1007 s00018 007 6558 4 url ref It is not present in bacteria or in plants. Its function is to oxidize D amino acids to the corresponding imino acid s, producing ammonia and hydrogen peroxide . This enzyme belongs to the FAD dependent oxidoreductase family , and acts on the CH NH2 group of D aminoacid donors with oxygen as acceptor. The enzyme is most active toward neutral D amino acids, and not active toward acidic D amino acids. Recently, mammalian D aminoacid oxidase has been connected to the brain D serine metabolism and to the regulation of the glutamatergic neurotransmission . In a postmortem study, the activity of DAAO was found to be two fold higher in schizophrenia . ref name pmid18378121 cite journal author Madeira C, Freitas ME, Vargas Lopes C, Wolosker H, Panizzutti R title Increased brain d aminoacid oxidase DAAO activity in schizophrenia journal Schizophr ... D aminoacid solutions and as the biolocical component in several biosensors. See also D aminoacid oxidase activator D aminoacid dehydrogenase D aspartate oxidase External links MeshName D AminoAcid Oxidase http www.calzyme.com commerce catalog spcategory.jsp?category id 1043 References reflist ... more details
D aminoacid dehydrogenase EC 1.4.99.1 is a bacteria l enzyme that catalyses the oxidation of aminoacid D amino acids into their corresponding ketoacid oxoacids . It contains both Flavin group flavin and nonheme iron as cofactors. ref name Olsiewski cite journal author Olsiewski PJ, Kaczorowski GJ, Walsh C title Purification and properties of D aminoacid dehydrogenase, an inducible membrane bound iron sulfur flavoenzyme from Escherichia coli B journal J. Biol. Chem. volume 255 issue 10 pages 4487 94 date 25 May 1980 pmid 6102989 url http www.jbc.org cgi reprint 255 10 4487 ref The enzyme has a very broad specificity and can act on most D amino acids. ref cite journal author Tsukada K title D aminoacid dehydrogenases of Pseudomonas fluorescens journal J. Biol. Chem. volume 241 issue 19 pages 4522 8 date 10 October 1966 pmid 5925166 url http www.jbc.org cgi reprint 241 19 4522 ref D aminoacid H sub 2 sub O acceptor a 2 oxo acid NH sub 3 sub reduced acceptor This reaction is distinct from the oxidation reaction catalysed by D aminoacid oxidase that uses oxygen as a second substrate, as the dehydrogenase can use many different compounds as electron acceptors, with the physiological substrate being coenzyme Q . ref name Olsiewski ref cite journal author Jones H, Venables WA title Effects of solubilisation on some properties of the membrane bound respiratory enzyme D aminoacid dehydrogenase of Escherichia coli journal FEBS Lett. volume 151 issue 2 pages 189 92 year 1983 pmid 6131836 doi 10.1016 0014 5793 83 80066 0 ref See also Oxidative phosphorylation Electron transport chain Microbial metabolism References Reflist External links http www.brenda enzymes.org php result flat.php4?ecno 1.4.99.1 BRENDA entry on EC 1.4.99.1 http www.expasy.org enzyme 1.4.99.1 ENZYME entry on EC 1.4.99.1 CH NH2 oxidoreductases Electron transport chain Cellular respiration DEFAULTSORT D AminoAcid Dehydrogenase Category Cellular respiration Category Metabolism Category EC 1.4 Enzyme stub ... more details
acids before editing this article This article does not list the effects of aminoacid deficiency. Please help Wikipedia by improving this article. An essential aminoacid or indispensable aminoacid is an aminoacid that cannot be synthesized de novo synthesis de novo by the organism usually referring ... for the determination of aminoacid requirements in humans? journal Journal of Nutrition volume ... , and histidine . ref cite journal author Young VR title Adult aminoacid requirements the case ... aminoacid pair, phenylalanine and tyrosine . Likewise arginine , ornithine , and citrulline ... , together with their standard one letter abbreviations. ref name WHO class wikitable Aminoacid ... nutrient s. Whether a particular aminoacid is essential depends upon the species and the stage ... casein from cow s milk. This led William Cumming Rose to the discovery of the essential aminoacid threonine . ref Rose WC, Haines WJ, Warner DT, Johnson JE. The aminoacid requirements of man. II. The role ... Evidence that histidine is an essential aminoacid in normal and chronically uremic man. journal ... Digestibility Corrected AminoAcid Score protein digestibility corrected aminoacid score . These concepts ..., or a supplement of an individual aminoacid methionine, lysine, threonine, or tryptophan can be added ... a complete aminoacid composition. Circulation journal Circulation . 2002 105 25 e197 ref Eating various ... Cite pmid 21526128 ref Essential aminoacid deficiency The amino acids that are essential in the human ... whenever human subjects were deprived of an essential aminoacid. ref Rose WC, Haines WJ, Warner DT. The aminoacid requirements of man. III. The role of isoleucine additional evidence concerning histidine. J Biol Chem. 1951 193 2 605 612 ref Essential aminoacid deficiency should be distinguished ... aminoacid to begin each word in a phrase, such as A ny H elp I n L earning T hese L ittle M olecules ... fatty acid Edible protein per unit area of land List of standard amino acids Orthomolecular medicine ... more details
Heterodimeric aminoacid transporters are a family of transport protein s that facilitate the transport of certain aminoacid s across cell membrane s. ref name pmid11546643 cite journal author Wagner CA, Lang F, Br er S title Function and structure of heterodimeric aminoacid transporters journal Am. J. Physiol., Cell Physiol. volume 281 issue 4 pages C1077 93 year 2001 month October pmid 11546643 doi url http ajpcell.physiology.org cgi content abstract 281 4 C1077 issn ref Each transporter comprises a two protein, a light and heavy, subunit. The following table lists the members of this family class wikitable style text align center width 80 Transport system width 80 Light subunit width 80 Heavy subunit Tissue distribution Substrates Affinity Sodium dependence Disease linkage L LAT1 SLC7A5 4F2hc SLC3A2 kidney, liver, intestine, brain, heart lung, blood brain barrier large neutral amino acids, thyroid hormone s micromolar no L LAT2 SLC7A8 4F2hc SLC3A2 kidney, intestine, brain, liver, muscle, heart, lung smaller neutral amino acids millimolar no y sup sup L y sup sup LAT1 SLC7A7 4F2hc SLC3A2 kidney, intestine, lung, erythrocytes, leukocytes large neutral amino acids, dibasic aminoacid exchange micromolar yes Lysinuric protein intolerance y sup sup L y sup sup LAT2 SLC7A6 4F2hc SLC3A2 brain, intestine, heart, kidney, lung, liver neutral amino acids, dibasic aminoacid exchange, glutamine arginine exchange millimolar yes x sub c sub sup sup xCT SLC7A11 4F2hc SLC3A2 macrophages, liver, kidney, brain glutamine cystine exchange no asc ascAT1 SLC7A10 4F2hc SLC3A2 brain, lung, small intestine, kidney small neutral amino acids no b sup 0, sup b sup 0, sup AT1 SLC7A9 rBAT SLC3A1 kidney, intestine, brain neutral dibasic amino acids no Cystinuria Cystinuria type I References Reflist protein stub Solute carrier family Category Amino acids Category Biomolecules ... more details
Infobox protein family Symbol Aa trans Name Transmembrane aminoacid transporter protein image width caption Pfam PF01490 InterPro IPR013057 SMART Prosite SCOP TCDB 2.A.18 OPM family OPM protein PDB An aminoacid transporter is a membrane transport protein that transports aminoacid s. They are mainly of the solute carrier family . Solute carrier family examples 1 Glutamate transporter high affinity glutamate and neutral aminoacid transporter ref name Kanai 2004 cite journal author Kanai Y, Hediger MA title The glutamate neutral aminoacid transporter family SLC1 molecular, physiological and pharmacological ... s00424 003 1146 4 pmid 14530974 ref 3 heavy subunits of heteromeric aminoacid transporters ref name ... of aminoacid transporters journal Pflugers Arch volume 447 issue 5 pages 490 494 year 2004 doi 10.1007 s00424 003 1062 7 pmid 14770309 ref 7 cationic aminoacid transporter glycoprotein associated ... title CATs and HATs the SLC7 family of aminoacid transporters journal Pflugers Arch volume 447 issue ... 2004 doi 10.1007 s00424 003 1090 3 pmid 12759755 ref 32 vesicular inhibitory aminoacid transporter ... release of inhibitory amino acids journal Pflugers Arch volume 447 issue 5 pages 752 755 year 2004 doi 10.1007 s00424 003 1091 2 pmid 12750892 ref 36 proton coupled aminoacid transporter ... 003 1073 4 pmid 12748860 ref 38 System A & N, sodium coupled neutral aminoacid transporter ref name Mackenzie 2004b cite journal author Mackenzie B, Erickson JD title Sodium coupled neutral aminoacid System N A transporters of the SLC38 gene family journal Pflugers Arch volume 447 issue 5 pages 784 795 year 2004 doi 10.1007 s00424 003 1117 9 pmid 12845534 ref VIAAT Vesicular inhibitory aminoacid transporter redirects here Vesicular inhibitory aminoacid transporter VIAAT is responsible for the storage of GABA and glycine in neuronal synaptic vesicles. ref Vesicular Inhibitory AminoAcid ... transporters for the absorption of selected amino acids from extracellular and intracellular ... more details
KDEL is a sequence in the aminoacid structure of a protein which keeps it from secreting from the endoplasmic reticulum ER . It also targets proteins from other locations such as the cytoplasm to the ER. Proteins can only leave the ER after this sequence has been cleaved off. The KDEL sequence is responsible for retrieval of ER luminal proteins from the Golgi apparatus . The abbreviation KDEL is formed by the corresponding letters to each aminoacid. This letter system was defined by the IUPAC and IUBMB in 1983, and is as follows K Lysine D Aspartic acid E Glutamic acid L Leucine Therefore, the sequence in three letter code is Lysine Lys Aspartic acid Asp Glutamic acid Glu Leucine Leu . See also ER retention Endoplasmic reticulum protein retention receptors KDELR1 KDELR2 KDELR3 References http www.ebi.ac.uk 2can biology molecules small aatable.html Basic Biology Molecules of life Small Molecules Category Amino acids Molecular biology stub cs KDEL ... more details
enzyme Name L aminoacid dehydrogenase EC number 1.4.1.5 CAS number 9029 13 4 IUBMB EC number 1 4 1 5 GO code 0050018 image width caption In enzymology , a L aminoacid dehydrogenase EC number 1.4.1.5 is an enzyme that catalysis catalyzes the chemical reaction an L aminoacid H sub 2 sub O NAD sup sup math rightleftharpoons math a 2 oxo acid NH sub 3 sub NADH H sup sup The 3 substrate biochemistry substrates of this enzyme are L aminoacid , water H sub 2 sub O , and nicotinamide adenine dinucleotide NAD sup sup , whereas its 4 product chemistry products are 2 oxo acid , ammonia NH sub 3 sub , nicotinamide adenine dinucleotide NADH , and hydrogen ion H sup sup . This enzyme belongs to the family of oxidoreductase s, specifically those acting on the CH NH2 group of donors with NAD or NADP as acceptor. The systematic name of this enzyme class is L aminoacid NAD oxidoreductase deaminating . References reflist 1 cite journal author Nisman B and Mager J date Lond. title Diphosphopyridine nucleotide and phosphate requirement for oxidation of amino acids by cell free extracts of obligate anaerobes journal N volume Nature pages 243&ndash 244 1.4 enzyme stub Category EC 1.4.1 Category NADH dependent enzymes Category Enzymes of unknown structure it L amminoacido deidrogenasi ja L ... more details
For the non biological synthesis of amino acids see Strecker aminoacid synthesis Aminoacid synthesis is the set of biochemical processes metabolic pathways by which the various aminoacid s are produced ... aminoacid ketoglutarate Glutamate itself is formed by amination of ketoglutarate ketoglutarate ... acid cycle and other major pathways Of the basic set of 20 amino acids not counting selenocysteine ... P, Stehle P title What are the essential elements needed for the determination of aminoacid requirements ... amino acids. At this step, the chirality of the aminoacid is established. Alanine and aspartate ... . Tyrosine is synthesized by the hydroxylation of phenylalanine , an essential aminoacid. The pathways ... Press, New York. On p273. ref Aminoacid biosynthesis is regulated by feedback inhibition Most of the pathways of aminoacid biosynthesis are regulated by feedback inhibition , in which the committed ... protein biosynthesis Protein metabolism Aminoacid metabolism enzymes Category Metabolism ca S ntesi ... in the organism s diet or growth media. Not all organisms are able to synthesise all amino acids. For example, humans are able to synthesise only 12 of the 20 standard amino acids. A fundamental problem ... for all the amino acids. The carbon backbones come from the glycolytic pathway , the pentose phosphate pathway , or the citric acid cycle . In aminoacid production, one encounters an important problem in biosynthesis, namely stereochemical control. Because all amino acids except glycine are chiral ... for the generation of chiral amino acids, the stereochemistry at the carbon atom is established ... and its regulators. Feedback and allosteric mechanisms ensure that all twenty amino acids are maintained in sufficient amounts for protein synthesis and other processes. Aminoacid synthesis Amino acids are synthesized from ketoacids , and later transaminated from another aminoacid, usually ... amino acids, nucleotides , and other nitrogen containing biomolecules. The major points of entry ... more details
Merge Human homeostasis date October 2011 Aminoacid response AAR is the mechanism triggered in mammalian cells by aminoacid starvation. The aminoacid response pathway is triggered by shortage of any essential aminoacid, and results in an increase in activating transcription factor ATF4 , which in turn affect many process by sundry pathways to limit or increase the production of other proteins. ref name Kilberg Proteins increased by AAR Expand list date March 2011 Membrane transporter s ref name Kilberg Transcription factor s from the basic region leucine zipper bZIP superfamily ref name Kilberg ref name Chen 2004 Growth factor s ref name Kilberg Metabolic enzyme s ref name Kilberg Proteins decreased by AAR Empty section date March 2011 Leucine starvation Expand section date March 2011 PCAF is recruited specifically to the CHOP aminoacid response element AARE to enhance the ATF4 transcriptional activity. ref name pmid17726049 References Reflist refs ref name Kilberg Kilberg MS, Pan YX, Chen H, Leung Pineda V. Nutritional control of gene expression how mammalian cells respond to aminoacid limitation . Annu. Rev. Nutr. 2005 25 59 85. ref ref name Chen 2004 Chen H, Pan YX, Dudenhausen EE, Kilberg MS. Aminoacid deprivation induces the transcription rate of the human asparagine synthetase gene through a timed program of expression and promoter binding of nutrient responsive basic region leucine zipper transcription factors as well as localized histone acetylation. J. Biol. Chem. 2004 279 50829 50839. ref ref name pmid17726049 cite journal author Ch rasse Y, Maurin AC, Chaveroux C, et al. title The p300 CBP associated factor PCAF is a cofactor of ATF4 for aminoacid regulated transcription of CHOP journal Nucleic Acids Res. volume 35 issue 17 pages 5954 65 year 2007 pmid 17726049 pmc 2034469 doi 10.1093 nar gkm642 url http nar.oxfordjournals.org cgi pmidlookup?view long&pmid 17726049 ref Category Transcription factors protein stub Biochemistry stub ... more details
enzyme Name L aminoacid oxidase EC number 1.4.3.2 CAS number 9000 89 9 IUBMB EC number 1 4 3 2 GO code 0001716 image width caption In enzymology , a L aminoacid oxidase EC number 1.4.3.2 is an enzyme that catalysis catalyzes the chemical reaction an L aminoacid H sub 2 sub O O sub 2 sub math rightleftharpoons math a 2 oxo acid NH sub 3 sub H sub 2 sub O sub 2 sub The 3 substrate biochemistry substrates of this enzyme are L aminoacid , water H sub 2 sub O , and oxygen O sub 2 sub , whereas its 3 product chemistry products are 2 oxo acid , ammonia NH sub 3 sub , and hydrogen peroxide H sub 2 sub O sub 2 sub . This enzyme belongs to the family of oxidoreductase s, specifically those acting on the CH NH2 group of donors with oxygen as acceptor. The systematic name of this enzyme class is L aminoacid oxygen oxidoreductase deaminating . This enzyme is also called ophio aminoacid oxidase . This enzyme participates in 8 metabolism metabolic pathways alanine and aspartate metabolism, methionine metabolism, valine , leucine and isoleucine degradation, tyrosine metabolism, phenylalanine metabolism, tryptophan metabolism, phenylalanine , tyrosine and tryptophan biosynthesis, and alkaloid biosynthesis. It employs one cofactor biochemistry cofactor , FAD . Structural studies As of late 2007, 11 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 1F8R , PDB link 1F8S , PDB link 1REO , PDB link 1TDK , PDB link 1TDN , PDB link 1TDO , PDB link 2IID , PDB link 2JAE , PDB link 2JB1 , PDB link 2JB2 , and PDB link 2JB3 . References reflist 1 Boyer, P.D., Lardy, H. and Myrback, K. Eds. , The Enzymes, 2nd ed., vol. 7, Academic Press, New York, 1963, p. 609 648. cite journal author Wellner D and Meister A date 1960 title Crystalline L aminoacid oxidase of Crotalus adamanteus journal J. Biol. Chem. volume 235 pages 2013&ndash 2018 pmid 13843884 1.4 enzyme stub Category EC 1.4.3 Category Flavin enzymes Category Enzymes ... more details
Encyclopedia
top
