| guanosine triphosphate | A molecule which consists of the nitrogenous base guanine linked to the sugar ribose and which has three phosphate groups attached to the 5th carbom atom of the ribose. GTP is a high-energy compound which serves as an energy source for many biochemical reactions. It is required for the formation of peptide bonds between amino acids during translation and is required for ribonucleic acid synthesis since it is a direct precursor. (09 Oct 1997) |
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| guanosine triphosphate binding protein | <protein> A type of protein embedded in the cytoplasmic membrane of the cell which transmits signals from outside the cell (such as from hormones binding to receptors on the outside of the cell) to the inside of the cell, where it causes some sort of biochemical reaction within the cell to the signal (such as the altering of metabolic pathways or gene expression). The process by which the protein does this is unclear but involves exchanging a molecule of GDP for a molecule of GTP. (09 Oct 1997) |
| myo-inositol 1,4,5-triphosphate phosphatase | <enzyme> Neutral pH optimum; magnesium dependent Registry number: EC 3.1.- Synonym: i-p3ase, inositol 1,4,5-triphosphate phosphatase (26 Jun 1999) |
| cytidine 5'-triphosphate | <biochemistry> An ester, at the 5' position, between cytidine and triphosphoric acid. Acronym: CTP (05 Mar 2000) |
| cytidine triphosphate | A molecule which consists of the nitrogenous base cytosine linked to the sugar ribose and which has a chain of three phosphate groups attached to the ribose in a linear fashion. CTP is required for the synthesis of DNA since it is a direct precursor molecule. (09 Oct 1997) |
| xanthosine 5'-triphosphate | Xanthosine with a triphosphoric acid esterified at its 5' position. (05 Mar 2000) |
| nucleoside triphosphate | A nucleoside in which the H of one of the ribose hydroxyls (usually the 5') is replaced by a triphosphoric group, -PO(OH)-O-PO(OH)-O-PO(OH)2; e.g., adenosine triphosphate. (05 Mar 2000) |
| nucleoside triphosphate-adenylate kinase | <enzyme> Other nucleoside triphosphates may replace GTP as substrate Registry number: EC 2.7.4.10 Synonym: GTP-AMP phosphotransferase, AMP-GTP phosphotransferase (26 Jun 1999) |
| D-erythro-dihydroneopterin triphosphate epimerase | <enzyme> Forms l-threo-dihydroneopterin triphosphate Registry number: EC 5.1.99.- Synonym: 2-amino-4-hydroxy-6-(d-erythro-1',2',3'-trihydroxy- propyl)-7,8-dihydropteridine triphosphate epimerase, dihydroneopterin triphosphate epimerase, folx gene product (26 Jun 1999) |
| diadenosine triphosphate hydrolase | <enzyme> Forms AMP Registry number: EC 3.1.4.- Synonym: ap3a hydrolase (26 Jun 1999) |
| dihydroneopterin triphosphate pyrophosphohydrolase | <enzyme> Human liver enzyme removes triphosphate to give 6-pyruvoyl-tetrahydrobiopterin Registry number: EC 3.6.1.- Synonym: 7,8-dihydroneopterin triphosphate phosphate eliminating enzyme, phosphate eliminating enzyme (26 Jun 1999) |
| inositol triphosphate phosphomonoesterase | <enzyme> Human erythrocyte membrane enzyme converts inositol 1,4,5-trisphosphate into inositol 1,4-bisphosphate Registry number: EC 3.1.3.- Synonym: intp esterase, triphosphoinositide phosphomonoesterase, inositol triphosphate phosphatase, inositol triphosphate 5-phosphatase (26 Jun 1999) |
| thiamine triphosphate | <chemical> 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-4-methyl-5-(4,6,8,8-tetrahydroxy-3,5,7-trioxa-4,6,8-triphosphaoct-1-yl)thiazolium hydroxide, inner salt, p,p',p''-trioxide. The triphosphate ester of thiamine. In leigh's disease, this compound is present in decreased amounts in the brain due to a metabolic block in its formation. Chemical name: Thiazolium, 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-4-methyl-5-(4,6,8,8-tetrahydroxy-3,5,7-trioxa-4,6,8-triphosphaoct-1-yl)-, inner salt, P,P',P''-trioxide (12 Dec 1998) |
| thymidine 5'-triphosphate | Thymidine esterified at its 5' position with triphosphoric acid; the immediate precursor of thymidylic acid in DNA. Acronym: dTTP (05 Mar 2000) |
| thymidine triphosphate | A molecule which consists of the nitrogenous base thymine linked to the sugar ribose and which has a chain of three phosphate groups attached to the ribose in a linear fashion. TTP is required for DNA and RNA synthesis since it is a direct precursor molecule. (09 Oct 1997) |