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EC 2.7.7.79 Details
EC number
2.7.7.79
Accepted name
tRNAHis guanylyltransferase
Reaction
p-tRNAHis + ATP + GTP + H2O = pGp-tRNAHis + AMP + 2 diphosphate (overall reaction);;(1a) p-tRNAHis + ATP = App-tRNAHis + diphosphate;;(1b) App-tRNAHis + GTP = pppGp-tRNAHis + AMP;;(1c) pppGp-tRNAHis + H2O = pGp-tRNAHis + diphosphate
Other name(s)
histidine tRNA guanylyltransferase, Thg1p (ambiguous), Thg1 (ambiguous)
Systematic name
p-tRNAHis:GTP guanylyltransferase (ATP-hydrolysing)
Comment
In eukarya an additional guanosine residue is added post-transcriptionally to the 5′-end of tRNAHis molecules. The addition occurs opposite a universally conserved adenosine73 and is thus the result of a non-templated 3′-5′ addition reaction. The additional guanosine residue is an important determinant for aminoacylation by EC 6.1.1.21, histidine—tRNA ligase.The enzyme requires a divalent cation for activity [2]. ATP activation is not required when the substrate contains a 5′-triphosphate (ppp-tRNAHis) [3].
History
created 2011
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EC Tree
1 Oxidoreductases
2 Transferases
2.1 Transferring one-carbon groups
2.2 Transferring aldehyde or ketonic groups
2.3 Acyltransferases
2.4 Glycosyltransferases
2.5 Transferring alkyl or aryl groups, other than methyl groups
2.6 Transferring nitrogenous groups
2.7 Transferring phosphorus-containing groups
2.7.1 Phosphotransferases with an alcohol group as acceptor
2.7.2 Phosphotransferases with a carboxy group as acceptor
2.7.3 Phosphotransferases with a nitrogenous group as acceptor
2.7.4 Phosphotransferases with a phosphate group as acceptor
2.7.5 Phosphotransferases with regeneration of donors, apparently catalysing intramolecular transfers (deleted sub-subclass)
2.7.6 Diphosphotransferases
2.7.7 Nucleotidyltransferases
2.7.7.1 nicotinamide-nucleotide adenylyltransferase
2.7.7.2 FAD synthase
2.7.7.3 pantetheine-phosphate adenylyltransferase
2.7.7.4 sulfate adenylyltransferase
2.7.7.5 sulfate adenylyltransferase (ADP)
2.7.7.6 DNA-directed RNA polymerase
2.7.7.7 DNA-directed DNA polymerase
2.7.7.8 polyribonucleotide nucleotidyltransferase
2.7.7.9 UTP—glucose-1-phosphate uridylyltransferase
2.7.7.10 UTP—hexose-1-phosphate uridylyltransferase
2.7.7.11 UTP—xylose-1-phosphate uridylyltransferase
2.7.7.12 UDP-glucose—hexose-1-phosphate uridylyltransferase
2.7.7.13 mannose-1-phosphate guanylyltransferase
2.7.7.14 ethanolamine-phosphate cytidylyltransferase
2.7.7.15 choline-phosphate cytidylyltransferase
2.7.7.16 created 1961, deleted 1972, [transferred to EC 3.1.4.22, deleted 1980]
2.7.7.17 created 1965, deleted 1972, [transferred to EC 3.1.4.23, deleted 1980]
2.7.7.18 nicotinate-nucleotide adenylyltransferase
2.7.7.19 polynucleotide adenylyltransferase
2.7.7.20 created 1965, deleted 1972
2.7.7.21 tRNA cytidylyltransferase
2.7.7.22 mannose-1-phosphate guanylyltransferase (GDP)
2.7.7.23 UDP-N-acetylglucosamine diphosphorylase
2.7.7.24 glucose-1-phosphate thymidylyltransferase
2.7.7.25 tRNA adenylyltransferase
2.7.7.26 created 1961 as EC 3.1.4.8, transferred 1965 to EC 2.7.7.26, deleted 1972
2.7.7.27 glucose-1-phosphate adenylyltransferase
2.7.7.28 nucleoside-triphosphate-aldose-1-phosphate nucleotidyltransferase
2.7.7.29 created 1972, deleted 2004
2.7.7.30 fucose-1-phosphate guanylyltransferase
2.7.7.31 DNA nucleotidylexotransferase
2.7.7.32 galactose-1-phosphate thymidylyltransferase
2.7.7.33 glucose-1-phosphate cytidylyltransferase
2.7.7.34 glucose-1-phosphate guanylyltransferase
2.7.7.35 ADP ribose phosphorylase
2.7.7.36 aldose-1-phosphate adenylyltransferase
2.7.7.37 aldose-1-phosphate nucleotidyltransferase
2.7.7.38 3-deoxy-manno-octulosonate cytidylyltransferase
2.7.7.39 glycerol-3-phosphate cytidylyltransferase
2.7.7.40 D-ribitol-5-phosphate cytidylyltransferase
2.7.7.41 phosphatidate cytidylyltransferase
2.7.7.42 [glutamine synthetase] adenylyltransferase
2.7.7.43 N-acylneuraminate cytidylyltransferase
2.7.7.44 glucuronate-1-phosphate uridylyltransferase
2.7.7.45 guanosine-triphosphate guanylyltransferase
2.7.7.46 gentamicin 2′′-nucleotidyltransferase
2.7.7.47 streptomycin 3′′-adenylyltransferase
2.7.7.48 RNA-directed RNA polymerase
2.7.7.49 RNA-directed DNA polymerase
2.7.7.50 mRNA guanylyltransferase
2.7.7.51 adenylylsulfate—ammonia adenylyltransferase
2.7.7.52 RNA uridylyltransferase
2.7.7.53 ATP adenylyltransferase
2.7.7.54 phenylalanine adenylyltransferase
2.7.7.55 anthranilate adenylyltransferase
2.7.7.56 tRNA nucleotidyltransferase
2.7.7.57 N-methylphosphoethanolamine cytidylyltransferase
2.7.7.58 (2,3-dihydroxybenzoyl)adenylate synthase
2.7.7.59 [protein-PII] uridylyltransferase
2.7.7.60 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase
2.7.7.61 citrate lyase holo-[acyl-carrier protein] synthase
2.7.7.62 adenosylcobinamide-phosphate guanylyltransferase
2.7.7.63 lipoate—protein ligase
2.7.7.64 UTP-monosaccharide-1-phosphate uridylyltransferase
2.7.7.65 diguanylate cyclase
2.7.7.66 malonate decarboxylase holo-[acyl-carrier protein] synthase
2.7.7.67 CDP-2,3-bis-(O-geranylgeranyl)-sn-glycerol synthase
2.7.7.68 2-phospho-L-lactate guanylyltransferase
2.7.7.69 GDP-L-galactose/GDP-D-glucose: hexose 1-phosphate guanylyltransferase
2.7.7.70 D-glycero-β-D-manno-heptose 1-phosphate adenylyltransferase
2.7.7.71 D-glycero-α-D-manno-heptose 1-phosphate guanylyltransferase
2.7.7.72 CCA tRNA nucleotidyltransferase
2.7.7.73 sulfur carrier protein ThiS adenylyltransferase
2.7.7.74 1L-myo-inositol 1-phosphate cytidylyltransferase
2.7.7.75 molybdopterin adenylyltransferase
2.7.7.76 molybdenum cofactor cytidylyltransferase
2.7.7.77 molybdenum cofactor guanylyltransferase
2.7.7.78 GDP-D-glucose phosphorylase
2.7.7.79 tRNAHis guanylyltransferase
2.7.7.80 molybdopterin-synthase adenylyltransferase
2.7.7.81 pseudaminic acid cytidylyltransferase
2.7.7.82 CMP-N,N′-diacetyllegionaminic acid synthase
2.7.7.83 UDP-N-acetylgalactosamine diphosphorylase
2.7.7.84 2′-5′ oligoadenylate synthase
2.7.7.85 diadenylate cyclase
2.7.7.86 cyclic GMP-AMP synthase
2.7.7.87 L-threonylcarbamoyladenylate synthase
2.7.7.88 GDP polyribonucleotidyltransferase
2.7.7.89 [glutamine synthetase]-adenylyl-L-tyrosine phosphorylase
2.7.7.90 8-amino-3,8-dideoxy-manno-octulosonate cytidylyltransferase
2.7.7.91 valienol-1-phosphate guanylyltransferase
2.7.7.92 3-deoxy-D-glycero-D-galacto-nonulopyranosonate cytidylyltransferase
2.7.7.93 phosphonoformate cytidylyltransferase
2.7.7.94 4-hydroxyphenylalkanoate adenylyltransferase
2.7.7.95 mycocerosic acid adenylyltransferase
2.7.7.96 ADP-D-ribose pyrophosphorylase
2.7.7.97 3-hydroxy-4-methylanthranilate adenylyltransferase
2.7.7.98 4-hydroxybenzoate adenylyltransferase
2.7.7.99 N-acetyl-α-D-muramate 1-phosphate uridylyltransferase
2.7.7.100 SAMP-activating enzyme
2.7.7.101 DNA primase DnaG
2.7.7.102 DNA primase AEP
2.7.7.103 L-glutamine-phosphate cytidylyltransferase
2.7.7.104 2-hydroxyethylphosphonate cytidylyltransferase
2.7.7.105 phosphoenolpyruvate guanylyltransferase
2.7.7.106 3-phospho-D-glycerate guanylyltransferase
2.7.7.107 (2-aminoethyl)phosphonate cytidylyltransferase
2.7.7.108 protein adenylyltransferase
2.7.8 Transferases for other substituted phosphate groups
2.7.9 Phosphotransferases with paired acceptors
2.7.10 Protein-tyrosine kinases
2.7.11 Protein-serine/threonine kinases
2.7.12 Dual-specificity kinases (those acting on Ser/Thr and Tyr residues)
2.7.13 Protein-histidine kinases
2.7.13.1 protein-histidine pros-kinase
2.7.13.2 protein-histidine tele-kinase
2.7.13.3 histidine kinase
2.7.14 Protein-arginine kinases
2.7.99 Other protein kinases
2.8 Transferring sulfur-containing groups
2.9 Transferring selenium-containing groups
2.10 Transferring molybdenum- or tungsten-containing groups
3 Hydrolases
4 Lyases
5 Isomerases
6 Ligases
7 Translocases