| protein metabolism | Decomposition and synthesis of protein in the tissues. Synonym: proteometabolism. (05 Mar 2000) |
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| protein methylesterase | <enzyme> Hydrolyzes protein methyl esters to yield methanol and unmethylated protein; found in bacterial and human cells Registry number: EC 3.1.1.- (26 Jun 1999) |
| protein methyltransferases | <enzyme> Enzymes that catalyze the methylation of amino acids after their incorporation into a polypeptide chain. S-adenosyl-l-methionine acts as the methylating agent. Registry number: EC 2.1.1 (12 Dec 1998) |
| protein N-terminal acetyltransferase | <enzyme> From saccharmyces cerevisiae; encodes a catalytic subunit of an n-terminal acetyltransferase; ard1 and nat1 proteins are subunits of this enzyme Registry number: EC 2.3.1.- Synonym: nat1 gene protein, saccharomyces, yeast protein n-terminal acetyltransferase, n-terminal protein acetyltransferase, ard1 protein (26 Jun 1999) |
| protein NH2-terminal asparagine deamidase | <enzyme> Converts amino terminal asparagine to aspartic acid; from porcine liver; mw about 33 kD Registry number: EC 3.5.1.- Synonym: porcine pnad (26 Jun 1999) |
| protein o-methyltransferase | <enzyme> An enzyme that catalyses the transfer of methyl groups from s-adenosylmethionine to free carboxyl groups of a protein molecule forming methyl esters. Chemical name: S-Adenosylmethionine:protein O-methyltransferase Registry number: EC 2.1.1.- (12 Dec 1998) |
| protein p16 | Product of the p16 tumour suppressor gene, that acts as cyclin-dependent kinase inhibitor of cdk4. (12 Dec 1998) |
| protein p34cdc2 | Phosphoprotein with protein kinase activity that functions in the g2/m phase transition of the cell cycle. It is the catalytic subunit of the maturation-promoting factor and complexes with both cyclin a and cyclin b in mammalian cells. The maximal activity of p34cdc2 is achieved when it is fully dephosphorylated. Protein p34cdc2, the product of the cdc2 gene in schizosaccharomyces pombe, should not be confused with the unrelated product of the cdc2 gene in saccharomyces cerevisiae that forms the large subunit of DNA polymerase III. (12 Dec 1998) |
| protein p53 | Nuclear phosphoprotein encoded by the p53 gene (genes, p53) whose normal function is to control cell proliferation. A mutant or absent p53 protein has been found in leukaemia, osteosarcoma, lung cancer, and colourectal cancer. (12 Dec 1998) |
| protein phosphatases | A class of enzymes that catalyze the dephosphorylation of specific phosphorylated proteins. (05 Mar 2000) |
| protein processing, post-translational | Any of various enzymically catalyzed post-translational modifications of peptides or proteins in the cell of origin. These modifications include carboxylation, hydroxylation, acetylation, phosphorylation, methylation, glycosylation, oxidation-reduction, degradation and lysis, peptide bond formation, and changes in molecular weight and electrophoretic motility. (12 Dec 1998) |
| protein quotient | The number obtained by dividing the quantity of globulin of the blood plasma by the quantity of albumin. Respiratory quotient (R.Q.), the steady state ratio of carbon dioxide produced by tissue metabolism to oxygen consumed in the same metabolism; for the whole body, normally about 0.82 under basal conditions; in the steady state, the respiratory quotient is equal to the respiratory exchange ratio. Synonym: respiratory coefficient. (05 Mar 2000) |
| protein S | Nitrogenous organic compounds, containing more than about 100 amino acid residues, molecular weight 8,000-200,000, in vegetable and animal matter. Proteins yield amino acids on hydrolysis and are foods assimilated as amino acids and reconstructed in the protoplasm. (12 Dec 1998) Previous: protein processing, post-translational, protein-proline kinase, protein quotientNext: protein S, protein s deficiency, protein sequencingprotein S Vitamin K dependent cofactor. (18 Nov 1997) |
| protein s deficiency | An autosomal dominant disorder showing decreased levels of plasma protein s antigen or activity, associated with venous thrombosis and pulmonary embolism. Protein s is a vitamin k-dependent plasma protein that inhibits blood clotting by serving as a cofactor for activated protein c (also a vitamin k-dependent protein), and the clinical manifestations of its deficiency are virtually identical to those of protein c deficiency. Treatment with heparin for acute thrombotic processes is usually followed by maintenance administration of coumarin drugs for the prevention of recurrent thrombosis. (12 Dec 1998) |
| protein sequencing | Determining the sequence of amino acids in a protein, a process carried out by automated techniques. (14 Nov 1997) |
| blood protein electrophoresis | Electrophoresis applied to blood proteins. (12 Dec 1998) |
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| bone Gla protein | <protein> Polypeptide of 50 residues formed from a 76-77 amino acid precursor and found in the extracellular matrix of bone. Binds hydroxyapatite. Has limited homology of its leader sequence with that of other Vitamin K dependent proteins such as prothrombin, Factors IX and X and Protein C. (18 Nov 1997) |
| bone morphogenetic protein | <protein> Activity derived from bone that induces the formation of cartilage and bone in vivo. Seven bone morphogenetic proteins have been described, BMP 1 being the only one not in the TGF beta superfamily. BMP 3 was formerly called osteogenin. Acronym: BMP (18 Nov 1997) |
| BRCA1 protein | Phosphoprotein encoded by the BRCA1 gene (genes, BRCA1). It has limited sequence similarity with known proteins. In normal cells the BRCA1 protein is localised in the nucleus, whereas in the majority of breast cancer cell lines and in malignant pleural effusions from breast cancer patients, it is localised mainly in the cytoplasm. (science 1995;270(5237):713,789-91) (12 Dec 1998) |
| byr1 protein kinase | <enzyme> Has been sequenced; from schizosaccharomyces pombe; antibody to this enzyme also reacts with s. Cerevisiae protein kinase ste7 and with a map kinase kinase from cos cells Registry number: EC 2.7.1.- (26 Jun 1999) |
| calcium-binding protein | <biochemistry> There are two main groups of calcium binding proteins, those that are similar to calmodulin and are called EF hand proteins and those that bind calcium and phospholipid (e.g. Lipocortin) and that have been grouped under the generic name of annexins. Many other proteins will bind calcium, although the binding site usually has considerable homology with the calcium-binding domains of calmodulin. They can act as transport proteins, regulator proteins or activator proteins. There is also a vitamin D-dependent variant which is a protein that plays a fundamental role in the vitamin d mediated transport of calcium in reptiles, amphibians, birds and mammals. It is found in the intestine, kidneys, egg shell gland, brain, and possibly other organs. Its molecular weight is species dependent. (12 May 2002) |
| calcium-calmodulin dependent protein kinase | <enzyme> A calmodulin-dependent enzyme that catalyses the phosphorylation of proteins. This enzyme is also sometimes dependent on calcium. A wide range of proteins can act as acceptor, including vimentin, synapsin, glycogen synthase, myosin light chains, and the microtubule-associated proteins. Registry number: EC 2.7.10.- (12 Dec 1998) |
| calcium-dependent protein kinase | <enzyme> Mw 51,000; requires ca; not stimulated by calmodulin, phospholipids or diacylglycerol; phosphorylates casein and histones forming primarily phosphoserine and phosphothreonine, respectively Registry number: EC 2.7.1.- Synonym: paramecium ca-dependent protein kinase (26 Jun 1999) |
| calcium dependent regulator protein | <protein> (CDRP) Early name for calmodulin. (18 Nov 1997) |
| calmodulin-dependent protein kinase IV kinase | <enzyme> Phosphorylates and activates cam-kinase iv; from brain Registry number: EC 2.7.10.- Synonym: cam-kinase iv kinase (26 Jun 1999) |
| cAMP receptor protein | catabolite (gene) activator protein |
| cap binding protein | <molecular biology, protein> Protein (24 kD) with affinity for cap structure at 5' end of mRNA that probably assists, together with other initiation factors, in binding the mRNA to the 40S ribosomal subunit. Translation of mRNA in vitro is faster if it has a cap binding protein. (18 Nov 1997) |
| p150 protein kinase | <enzyme> Mw 150 kD; forms a cellular complex with phosphatidylinositol 3-kinase; a homolog of vps15 protein kinase; amino acid sequence given in first source Registry number: EC 2.7.1.- (26 Jun 1999) |
| p21(ras) farnesyl-protein transferase | <enzyme> Transfers the farnesyl moiety from farnesyl pyrophosphate to a cysteine in p21(ras) proteins; composed of an alpha and a beta subunit Registry number: EC 2.5.1.- Synonym: farnesyl-protein transferase p21(ras), ras p21 farnesyl-protein transferase, protein-cysteine farnesyltransferase, pc farnesyltransferase, protein farnesyltransferase, p21(ras) farnesyltransferase, farnesyl-protein transferase-alpha, farnesyl-protein transferase-beta, ft alpha, ft beta, caax farnesyltransferase, ftase enzyme (26 Jun 1999) |
| P400 protein | <protein> Inositol 1,4, 5 triphosphate receptor (InsP3 R). Key protein to understanding mechanisms of InsP3 mediated Ca mobilisation. Originally found as a cerebellar glycoprotein of 250 kD and subsequently shown to be identical to the InsP3 receptor protein. (18 Nov 1997) |