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*  Cystatin
The cystatins are a family of cysteine protease inhibitors which share a sequence homology and a common tertiary structure of ... Machleidt W, Borchart U, Fritz H, Brzin J, Ritonja A, Turk V (November 1983). "Protein inhibitors of cysteine proteinases. II. ... van Wyk SG, Du Plessis M, Cullis CA, Kunert KJ, Vorster BJ (November 2014). "cysteine protease and cystatin expression and ... found some 19 different cystatins similar to oryzacystatin-I in the soybean along with related cysteine proteases. Chicken ...
*  CST1
The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions, ... This gene is located in the cystatin locus and encodes a cysteine proteinase inhibitor found in saliva, tears, urine, and ... Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory ... Isemura S, Saitoh E, Sanada K (1986). "Characterization of a new cysteine proteinase inhibitor of human saliva, cystatin SN, ...
*  Papain
"Novel cysteine proteinase inhibitors homologous to the proregions of cysteine proteinases". Curr Protein Pept Sci. 3 (2): 231- ... This cysteine then performs a nucleophilic attack on the carbonyl carbon of a peptide backbone. This forms a covalent acyl- ... Papain, also known as papaya proteinase I, is a cysteine protease (EC 3.4.22.2) enzyme present in papaya (Carica papaya) and ... The mechanism by which papain breaks peptide bonds involves the use of a catalytic triad with a deprotonated cysteine. Asn-175 ...
*  Cysteine protease
In fact, dozens of latices of different plant families are known to contain cysteine proteases. Cysteine proteases are used as ... The MEROPS online database for peptidases and their inhibitors: Cysteine Peptidases Cysteine endopeptidases at the US National ... Within each superfamily, families are designated by their catalytic nucleophile (C = cysteine proteases). Families of Cysteine ... Plant cysteine proteases isolated from these plants have been found to have high proteolytic activities that are known to ...
*  Protein primary structure
Typically, the hydroxyl group of a serine (rarely, threonine) or the thiol group of a cysteine residue will attack the carbonyl ... atom of cysteine residues to anchor proteins to cellular membranes. Unlike the GPI and myritoyl anchors, these groups are not ... specifying the cysteines involved in the protein's disulfide bonds. Other crosslinks include desmosine. The chiral centers of a ...
*  Cysteine
L-Cysteine is also used as a processing aid for baking. In the field of personal care, cysteine is used for permanent wave ... N-Acetyl-L-cysteine is a derivative of cysteine wherein an acetyl group is attached to the nitrogen atom. This compound is sold ... Again, the cysteine is used for breaking up the disulfide bonds in the hair's keratin. Cysteine is a very popular target for ... While free cysteine residues do occur in proteins, most are covalently bonded to other cysteine residues to form disulfide ...
*  Cysteine metabolism
In human cysteine metabolism, L-cysteine is consumed in several ways as shown below. L-cysteine is also consumed in methionine ... L-cysteine is the product of several processes as well. In addition to the reactions below, L-cysteine is also a product of ... Cysteine metabolism refers to the biological pathways that consume or create cysteine. The pathways of different amino acids ...
*  Cysteine dioxygenase
... cysteine sulfinate) by incorporation of dioxygen. Cysteine sulfinic acid lies at a branch-point in cysteine catabolism, where ... is a mammalian non-heme iron enzyme that catalyzes the conversion of L-cysteine to cysteine sulfinic acid ( ... Also, cysteine sulfinate can undergo transamination to form β-sulfinylpyruvate, decomposing to form pyruvate and sulfite. ... The cysteine sulfinic acid-dependent pathway of taurine metabolism follows the synthesis of hypotaurine (2-aminoethane ...
*  Cysteine desulfurase
In enzymology, a cysteine desulfurase (EC 2.8.1.7) is an enzyme that catalyzes the chemical reaction L-cysteine + [enzyme]- ... The systematic name of this enzyme class is L-cysteine:[enzyme cysteine] sulfurtransferase. Other names in common use include ... the two substrates of this enzyme are L-cysteine and [[[enzyme]-cysteine]], whereas its two products are L-alanine and [[[ ... Zheng L, White RH, Cash VL, Jack RF, Dean DR (1993). "Cysteine desulfurase activity indicates a role for NIFS in metallocluster ...
*  Cysteine synthase
In enzymology, a cysteine synthase (EC 2.5.1.47) is an enzyme that catalyzes the chemical reaction O3-acetyl-L-serine + ... Ikegami F, Kaneko M, Lambein F, Kuo Y-H & Murakoshi I (1987). "Difference between uracilylalanine synthases and cysteine ... This enzyme participates in 3 metabolic pathways: cysteine metabolism, selenoamino acid metabolism, and sulfur metabolism. It ... cysteine synthetase, S-sulfocysteine synthase, 3-O-acetyl-L-serine:hydrogen-sulfide, and 2-amino-2-carboxyethyltransferase. ...
*  Cysteine lyase
In enzymology, a cysteine lyase (EC 4.4.1.10) is an enzyme that catalyzes the chemical reaction L-cysteine + sulfite ⇌ {\ ... and L-cysteine hydrogen-sulfide-lyase (adding sulfite). This enzyme participates in cysteine metabolism and taurine and ... The systematic name of this enzyme class is L-cysteine hydrogen-sulfide-lyase (adding sulfite L-cysteate-forming). Other names ... Tolosa EA, Chepurnova NK, Khomutov RM, Severin ES (1969). "Reactions catalysed by cysteine lyase from the yolk sac of chicken ...
*  Cysteine transaminase
In enzymology, a cysteine transaminase (EC 2.6.1.3) is an enzyme that catalyzes the chemical reaction L-cysteine + 2- ... Other names in common use include cysteine aminotransferase, L-cysteine aminotransferase, and CGT. This enzyme participates in ... The systematic name of this enzyme class is L-cysteine:2-oxoglutarate aminotransferase. ... the two substrates of this enzyme are L-cysteine and 2-oxoglutarate, whereas its two products are mercaptopyruvate and L- ...
*  S-Allyl cysteine
It is a derivative of the amino acid cysteine in which an allyl group has been added to the sulfur atom. Allyl cysteine is ... S-Allyl cysteine (SAC) is an organic compound that is a natural constituent of fresh garlic. ... Alliin, the S-oxide of allyl cysteine Yeh YY, Liu L (2001). "Cholesterol-lowering effect of garlic extracts and organosulfur ...
*  Cysteine sulfinic acid
... is derived from cysteine. In the cysteine sulfinic acid pathway, cysteine is oxidized to cysteine ... Cysteine sulfinic acid is an amino acid containing a sulfinic acid functional group. It is a white solid that is soluble in ... Cysteine sulfinic acid, in turn, is decarboxylated by sulfinoalanine decarboxylase to form hypotaurine, which in turn is ... It is an intermediate in cysteine metabolism. It is not a coded amino acid, but is produced post-translationally. ...
*  Cysteine-conjugate transaminase
Other names in common use include cysteine conjugate aminotransferase, and cysteine-conjugate alpha-ketoglutarate transaminase ... In enzymology, a cysteine-conjugate transaminase (EC 2.6.1.75) is an enzyme that catalyzes the chemical reaction S-(4- ... The systematic name of this enzyme class is S-(4-bromophenyl)-L-cysteine:2-oxoglutarate aminotransferase. ... L-cysteine and 2-oxoglutarate, whereas its two products are S-(4-bromophenyl)mercaptopyruvate and L-glutamate. This enzyme ...
*  Cysteine-tRNA ligase
In enzymology, a cysteine-tRNA ligase (EC 6.1.1.16) is an enzyme that catalyzes the chemical reaction ATP + L-cysteine + ... and cysteine translase. This enzyme participates in cysteine metabolism and aminoacyl-trna biosynthesis. As of late 2007, 3 ... The systematic name of this enzyme class is L-cysteine:tRNACys ligase (AMP-forming). Other names in common use include ... L-cysteine, and tRNA(Cys), whereas its 3 products are AMP, diphosphate, and L-cysteinyl-tRNA(Cys). This enzyme belongs to the ...
*  D-cysteine desulfhydrase
In enzymology, a D-cysteine desulfhydrase (EC 4.4.1.15) is an enzyme that catalyzes the chemical reaction D-cysteine + H2O ⇌ {\ ... Schmidt A; Erdle I (1983). "A cysteine desulfhydrase specific for D-cysteine from the green-alga Chlorella fusca". Z. ... Schmidt A (1982). "A cysteine desulfhydrase from spinach leaves specific for D-cysteine". Z. Pflanzenphysiol. 107: 301-312. ... and D-cysteine sulfide-lyase (deaminating). This enzyme participates in cysteine metabolism. Nagasawa T, Ishii T, Kumagai H, ...
*  Phosphopantothenate-cysteine ligase
L-cysteine ⇌ {\displaystyle \rightleftharpoons } NMP + diphosphate + N-[(R)-4'-phosphopantothenoyl]-L-cysteine The nucleoside ... Phosphopantothenate-cysteine ligase from the bacterium Escherichia coli uses cytidine triphosphate (CTP) as an energy donor, ... In enzymology, a phosphopantothenate-cysteine ligase also known as phosphopantothenoylcysteine synthetase (PPCS) is an enzyme ... L-cysteine ligase. This enzyme is also called phosphopantothenoylcysteine synthetase. Phosphopantothenoylcysteine synthetase in ...
*  Glutamate-cysteine ligase
L-cysteine + ATP ⇌ {\displaystyle \rightleftharpoons } gamma-glutamyl cysteine + ADP + Pi GSH, and by extension GCL, is ... Glutamate cysteine ligase modifier subunit (GCLM, ~31 kDa) has no enzymatic activity on its own but increases the catalytic ... Glutamate Cysteine Ligase (GCL) (EC 6.3.2.2), previously known as gamma-glutamylcysteine synthetase (GCS), is the first enzyme ... Glutamate cysteine ligase (GCL) catalyzes the first and rate-limiting step in the production of the cellular antioxidant ...
*  Cysteine rich protein 3
... is a protein that in humans is encoded by the CRIP3 gene. GRCh38: Ensembl release 89: ENSG00000146215 ...
*  Cysteine dioxygenase type 1
Dominy JE, Hwang J, Stipanuk MH (2007). "Overexpression of cysteine dioxygenase reduces intracellular cysteine and glutathione ... Cysteine dioxygenase type 1 is a protein that in humans is encoded by the CDO1 gene. GRCh38: Ensembl release 89: ...
*  Cysteine-rich secretory protein
CRISPs are glycoproteins in which the primary structure is rich in the amino acid cysteine. Cysteine residues are typically ... Cysteine-rich secretory proteins, often abbreviated as CRISPs, are a group of glycoproteins. They are a subgroup of the CRISP, ... Osipov, A. V.; Levashov, M. Y.; Tsetlin, V. I.; Utkin, Y. N. (2005). "Cobra Venom Contains a Pool of Cysteine-Rich Secretory ... Koppers, A. J.; Reddy, T.; O'Bryan, M. K. (2010). "The Role of Cysteine-Rich Secretory Proteins in Male Fertility". Asian ...
*  S-Aminoethyl-L-cysteine
... , also known as thialysine, is a toxic analog of the amino acid lysine in which the second carbon of the ...
*  Cysteine-S-conjugate beta-lyase
... glutamine transaminase K/cysteine conjugate beta-lyase, and L-cysteine-S-conjugate thiol-lyase (deaminating). It employs one ... In enzymology, a cysteine-S-conjugate beta-lyase (EC 4.4.1.13) is an enzyme that catalyzes the chemical reaction RS-CH2-CH(NH3+ ... The systematic name of this enzyme class is L-cysteine-S-conjugate thiol-lyase (deaminating; pyruvate-forming). Other names in ... Tateishi M, Suzuki S, Shimizu H (1978). "Cysteine conjugate beta-lyase in rat liver. A novel enzyme catalyzing formation of ...
*  Cysteine-S-conjugate N-acetyltransferase
... an S-substituted N-acetyl-L-cysteine Thus, the two substrates of this enzyme are acetyl-CoA and S-substituted L-cysteine, ... In enzymology, a cysteine-S-conjugate N-acetyltransferase (EC 2.3.1.80) is an enzyme that catalyzes the chemical reaction ... The systematic name of this enzyme class is acetyl-CoA:S-substituted L-cysteine N-acetyltransferase. This enzyme participates ... Duffel MW, Jakoby WB (1982). "Cysteine S-conjugate N-acetyltransferase from rat kidney microsomes". Mol. Pharmacol. 21 (2): 444 ...