| guanosine 5'-o-(3-thiotriphosphate) | <chemical> Guanosine 5'-(trihydrogen diphosphate), monoanhydride with phosphorothioic acid. A stable GTP analog which enjoys a variety of physiological actions such as stimulation of guanine nucleotide-binding proteins, phosphoinositide hydrolysis, cyclic AMP accumulation, and activation of specific proto-oncogenes. Chemical name: Guanosine 5'-(trihydrogen diphosphate), P'-anhydride with phosphorothioic acid (12 Dec 1998) |
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| guanosine 5'-triphosphate | An immediate precursor of guanine nucleotides in RNA; similar to ATP; has a crucial role in microtubule formation. GTP cyclohydrolase, an enzyme that catalyses the reaction of GTP and H2O forming formate and a precursor of tetrahydrobiopterin; a deficiency of this enzyme will result in one form of malignant hyperphenylalaninaemia. Acronym: GTP (05 Mar 2000) |
| guanosine monophosphate | A ribonucleotide which consists of the nitrogenous base guanine linked to the sugar ribose and which has a phosphate group attached to the 5th carbon atom of the ribose. (09 Oct 1997) |
| guanosine pentaphosphate | <chemical> Guanosine 5'-triphosphate 2'(3')-diphosphate. A guanine nucleotide containing five phosphate groups. Three phosphate groups are esterified to the sugar moiety in the 5' position and the other two in the 2' or 3' position. This nucleotide serves as a messenger to turn off the synthesis of ribosomal RNA when amino acids are not available for protein synthesis. Synonym: magic spot II. Chemical name: Guanosine 5'-(tetrahydrogen triphosphate), 3'-(trihydrogen diphosphate) (12 Dec 1998) |
| guanosine pentaphosphate synthetase | <enzyme> Also possesses polynucleotide phosphorylase activity; genbank u19858 Registry number: EC 2.7.6.- Synonym: guanosine pentaphosphate synthetase I, gpsi enzyme (26 Jun 1999) |
| guanosine phosphotransferase | <enzyme> From eimeria tenella; uses several phosphate donors: acetyl phosphate, ATP, utp, phosphoribosyl pyrophosphate to form GMP Registry number: EC 2.7.1.- Synonym: gptase (26 Jun 1999) |
| guanosine tetraphosphate | <chemical> Guanosine 5'-diphosphate 2'(3')-diphosphate. A guanine nucleotide containing four phosphate groups. Two phosphate groups are esterified to the sugar moiety in the 5' position and the other two in the 2' or 3' position. This nucleotide serves as a messenger to turn off the synthesis of ribosomal RNA when amino acids are not available for protein synthesis. Synonym: magic spot I. Chemical name: Guanosine 5'-(trihydrogen diphosphate), mono(trihydrogen diphosphate) (ester) (12 Dec 1998) |
| 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) |
| 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) |
| phosphomannose isomerase-guanosine diphospho-D-mannose pyrophosphorylase | <chemical> Encoded by alfa gene; from pseudomonas aeruginosa; similar to pssm protein; amino acid sequence given in first source;see also separate records for EC 2.7.7.13 (GDPmannose pyrophosphorylase) and EC 5.3.1.8 (mannosephosphate isomerase) Synonym: pmi-GMP, alga protein (26 Jun 1999) |
| cyclic guanosine monophosphate | A cyclic version of the nucleotide guanosine monophosphate. It plays a role in communicating vision from the eyes to the brain. (09 Oct 1997) |
| tRNA(guanosine-2'-)-methyltransferase | <enzyme> Transfers the methyl group from s-adenosyl-l-methionine to the 2'-hydroxyl group of a guanosine residue present in a gg sequence in trna(try) Registry number: EC 2.1.1.34 Synonym: trna(gm)methylase, trna(wobble guanosine 2'-o-)methyltransferase (26 Jun 1999) |
| U1 small nuclear RNA-(guanosine-N2)-methyltransferase | <enzyme> A trans-active non-small nuclear ribonucleoprotein; facilitates the formation of the m3g cap Registry number: EC 2.1.1.- Synonym: u1 snrna(g-n2)mtase (26 Jun 1999) |
| adenosine 5'-diphosphate | A condensation product of adenosine with pyrophosphoric acid, formed from ATP by the hydrolysis of the terminal phosphate group of the latter compound. Acronym: ADP (05 Mar 2000) |
| adenosine diphosphate | <biochemistry> ADP is used as an adenine, a ribose and a diphosphate unit. (06 May 1997) |