| protein shock | The systemic reaction following the parenteral administration of a protein. (05 Mar 2000) |
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| protein shock therapy | The injection of a foreign protein to induce fever as a means of treating certain diseases. Synonym: foreign protein therapy. (05 Mar 2000) |
| protein splicing | Excision of in-frame internal protein sequences (inteins) of a precursor protein, coupled with ligation of the flanking sequences (exteins). Protein splicing is an autocatalytic reaction and results in the production of two proteins from a single primary translation product: the intein and the mature protein. (12 Dec 1998) |
| protein status | A term used to indicate the level of protein in a person's system. A severe lack of protein can result in protein-calorie malnutrition. (16 Dec 1997) |
| protein structure | The amino acids and their manner of arrangement in constituting a protein. The four stages of protein structuring are primary (protein structure, primary see amino acid sequence), secondary (protein structure, secondary), tertiary (protein structure, tertiary), and quaternary (protein structure, quaternary see protein conformation). (12 Dec 1998) |
| protein structure, secondary | The stage in the development of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to alpha helices and beta sheets. This is the first folding level of protein building. (12 Dec 1998) |
| protein structure, tertiary | The stage in the structural development of a protein in which combinations of alpha helices and beta sheets pack together to form compactly folded globular units named domains. Small proteins consist of only one domain but larger proteins contain a number of domains which are usually connected by open lengths of polypeptide chain. This stage is a combination of the second and third folding levels of protein building. (12 Dec 1998) |
| protein synthesis | The process in which individual amino acids, whether of exogenous or endogenous origin, are connected to each other in peptide linkage in a specific order dictated by the sequence of nucleotides in DNA; this governing sequence is conveyed to the synthesizing apparatus in the ribosomes by mRNA, formed by base-pairing on the DNA template. (05 Mar 2000) |
| protein synthesis inhibitor | Compounds which inhibit the synthesis of proteins. They are usually antibiotics or toxins. Mechanism of the action of inhibition includes the interruption of peptide-chain elongation, the blocking the the a site of ribosomes, the misreading of the genetic code or the prevention of the attachment of oligosaccharide side chains to glycoproteins. (12 Dec 1998) |
| protein targeting | The process through which newly-made proteins are sorted and carriedto different parts of a cell. (09 Oct 1997) |
| protein Zero | <protein> The major glycoprotein of peripheral nerve myelin, an integral transmembrane protein, synthesised by Schwann cells (Mw = 28, 500). (18 Nov 1997) |
| protein-arginine n-methyltransferase | <enzyme> An enzyme that catalyses the methylation of arginine residues of proteins to yield n-mono- and n,n-dimethylarginine. This enzyme is found in many organs, primarily brain and spleen. Chemical name: S-Adenosyl-L-methionine:protein-L-arginine N-methyltransferase Registry number: EC 2.1.1.23 (12 Dec 1998) |
| protein-bound iodine | Thyroid hormone in its circulating form, consisting of one or more of the iodothyronines bound to one or more of the serum proteins. (05 Mar 2000) |
| protein-bound iodine test | A formerly used test of thyroid function in which serum protein-bound iodine is measured to provide an estimate of hormone bound to protein in peripheral blood. Synonym: PBI test. (05 Mar 2000) |
| protein-calorie malnutrition | Severe deficiency of protein + inadequate caloric intake = kwashiorkor. (12 Dec 1998) |
| p54 protein kinase | <enzyme> A stress-activated kinase related to erk-1 and erk-2 but activated preferentially by heat shock, protein-synthesis inhibitors and thf-alpha; phosphorylates c-jun proteins; genbank l27111 Registry number: EC 2.7.10.- Synonym: p54 map kinase (26 Jun 1999) |
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| gag protein | <molecular biology> The protein of the nucleocapsid shell around the RNA of a retrovirus. (18 Nov 1997) |
| galactose binding protein | <protein> A bacterial periplasmic protein, most studied in E. Coli, that acts both as a sensory element in the detection of galactose as a chemotactic signal and in the uptake of the sugar. (18 Nov 1997) |
| macrophage inflammatory protein | <cytokine> A chemokine that is chemotactic for neutrophils and monocytes, stimulates macrophages, and may play a role in regulating haematopoiesis. Its two variants, mip-1alpha and mip-1beta, are 60% homologous to each other. They are heparin-binding proteins that exhibit a number of inflammatory and immunoregulatory activities. Originally identified as secretory products of macrophages, these chemokines are produced by a variety of cell types including neutrophils, fibroblasts, and epithelial cells. They most likely also play a significant role in respiratory tract defenses. (20 Sep 2002) |
| Varciella-Zoster ORF47-associated protein kinase | <enzyme> Catalyses the in vitro phosphorylation of the vzv orf62 protein Registry number: EC 2.7.1.- Synonym: vzv orf47-apk (26 Jun 1999) |
| MAG protein | <protein> Myelin associated glycoprotein, one of the immunoglobulin superfamily. (18 Nov 1997) |
| palmitoyl-protein thioesterase | <enzyme> Cleaves palmitoyl-cysteine bond of proteins; genbank u44772; do not confuse with palmitoyl-acyl carrier protein thioesterase Registry number: EC 3.1.2.- Synonym: palmitoyl-ras thioesterase, protein palmitoyl thioesterase (26 Jun 1999) |
| major intrinsic protein | <protein> Family of structurally related proteins with 6 transmembrane segments, associated with gap junctions or vacuoles. MIP is found in lens fibre gap junctions. Other members: nodulin 26 (soybean), tonoplast intrinsic protein (TIP) found in plant storage vacuoles, Drosophila neurogenic protein big brain. (18 Nov 1997) |
| gap-43 protein | A nervous tissue specific protein which is highly expressed in neurons during development and nerve regeneration. It has been implicated in neurite outgrowth, long-term potentiation, signal transduction, and neurotransmitter release. It is also a substrate of protein kinase c. (12 Dec 1998) |
| GAP protein | <molecular biology> Originally purified as a 125 kD protein from bovine brain (1044 amino acids), stimulates the GTPase activity of ras p21 and thereby switches it to the inactive state. GAP may itself be regulated by phospholipids and by phosphorylation on a tyrosine residue by growth factor receptors (PDGF R, EGF R). The neurofibromatosis type 1 gene NF1) codes for a protein homologous to GAP. GAP has both SH2 and SH3 domains. Another example is sar 1 (from yeast). (18 Nov 1997) |
| MAK-L protein kinase | <enzyme> Putative protein serine threonine kinase from microtubules, nuclei and centromeres of cho-k1 cells; 72% identical to human kiaa0204 protein; genbank af002245 Registry number: EC 2.7.10.- Synonym: microtubule-associated kinase, large, 3d2 protein, cho-k1 (26 Jun 1999) |
| Mak protein kinase | <enzyme> A testis-specific kinase expressed in the meiotic phase of spermatogenesis in rat; one of the physiological substrates is a 210 kD phosphoprotein; distantly related to cdc2 kinase; has been sequenced Registry number: EC 2.7.10.- Synonym: mak gene product, male germ cell-associated kinase (26 Jun 1999) |
| malonyl-CoA-acetyl CoA-acyl carrier protein S-acyltransferase | <enzyme> Specific for either malonyl-CoA or acetyl-CoA; a component of fatty acid synthase Registry number: EC 2.8.3.- Synonym: mcoa-acoa acp acyltransferase (26 Jun 1999) |
| maltose binding protein | <protein> Protein of the bacterial (E. Coli) surface that links with MCP II and is involved in the chemotactic response to maltose, probably derived from a similar protein that links with a trans membrane transport system. (18 Nov 1997) |
| GCN2 protein kinase | <enzyme> From saccharomyces cerevisiae; has homology to eif-2alpha kinase Registry number: EC 2.7.1.- (26 Jun 1999) |