| Literature DB >> 787930 |
R Marutzky, J Flossdorf, M R Kula.
Abstract
No analogous nucleoside triphosphate was found which acts as well as ATP in binding to and supporting catalysis of leucyl-tRNA synthetase from Escherichia coli MRE 600. However, there are numerous nucleotides which are able to replace ATP, but with lower efficiency. The 6-amino group of the adenine ring and the 2'-hydroxyl group of the ribose ring are essential for binding and catalytic activity. Alterations in the triphosphate moiety of the molecule can cause drastic changes in Km and/or Vmax, whereas alterations of the imidazole ring and substitutions at the 8-position of the adenine ring cause only minor losses of catalytic activity.Entities:
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Year: 1976 PMID： 787930 PMCID： PMC343062 DOI： 10.1093/nar/3.8.2067
Source DB: PubMed Journal: Nucleic Acids Res ISSN： 0305-1048 Impact factor: 16.971