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Literature summary extracted from

  • Placido, A.; Sieber, F.; Gobert, A.; Gallerani, R.; Giegé, P.; Maréchal-Drouard, L.
    Plant mitochondria use two pathways for the biogenesis of tRNAHis (2010), Nucleic Acids Res., 38, 7711-7717.
    View publication on PubMedView publication on EuropePMC

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
2.7.7.79 mitochondrion
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 Solanum tuberosum 5739
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Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.7.7.79 p-tRNAHis + ATP + GTP Solanum tuberosum all tRNAHis possess an essential extra G–1 guanosine residue at their 5' end. This extra guanylate residue can be generated via two different processes. In Escherichia coli and in chloroplasts, the G–1 is genome-encoded and retained during tRNA maturation because of an unusual cleavage of the pre-tRNAHis at the (-1) position by RNase P. In Saccharomyces cerevisiae as well as in Drosophila melanogaster the G–1 is not genome-encoded and must be post-transcriptionally added at the 5' terminus of the nuclear-encoded tRNAHis by a specific tRNAHis guanylyltransferase. In plant mitochondria, although trnH genes possess a G–1 tRNAHis guanylyltransferase activity is present in plant mitochondria pppGp-tRNAHis + AMP + diphosphate
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 ?

Organism

EC Number Organism UniProt Comment Textmining
2.7.7.79 Solanum tuberosum
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-
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Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.7.7.79 p-tRNAHis + ATP + GTP
-
 Solanum tuberosum pppGp-tRNAHis + AMP + diphosphate
-
 ?
2.7.7.79 p-tRNAHis + ATP + GTP all tRNAHis possess an essential extra G–1 guanosine residue at their 5' end. This extra guanylate residue can be generated via two different processes. In Escherichia coli and in chloroplasts, the G–1 is genome-encoded and retained during tRNA maturation because of an unusual cleavage of the pre-tRNAHis at the (-1) position by RNase P. In Saccharomyces cerevisiae as well as in Drosophila melanogaster the G–1 is not genome-encoded and must be post-transcriptionally added at the 5' terminus of the nuclear-encoded tRNAHis by a specific tRNAHis guanylyltransferase. In plant mitochondria, although trnH genes possess a G–1 tRNAHis guanylyltransferase activity is present in plant mitochondria Solanum tuberosum pppGp-tRNAHis + AMP + diphosphate
-
 ?

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
2.7.7.79 37
-
 assay at Solanum tuberosum

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.7.7.79 7.3
-
 assay at Solanum tuberosum