| Literature DB >> 10600385 |
Y Mechulam1, E Schmitt, L Maveyraud, C Zelwer, O Nureki, S Yokoyama, M Konno, S Blanquet.
Abstract
The 3D structure of monomeric C-truncated Escherichia coli methionyl-tRNA synthetase, a class 1 aminoacyl-tRNA synthetase, has been solved at 2.0 A resolution. Remarkably, the polypeptide connecting the two halves of the Rossmann fold exposes two identical knuckles related by a 2-fold axis but with zinc in the distal knuckle only. Examination of available MetRS orthologs reveals four classes according to the number and zinc content of the putative knuckles. Extreme cases are exemplified by the MetRS of eucaryotic or archaeal origin, where two knuckles and two metal ions are expected, and by the mitochondrial enzymes, which are predicted to have one knuckle without metal ion. Copyright 1999 Academic Press.Entities:
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Year: 1999 PMID： 10600385 DOI： 10.1006/jmbi.1999.3339
Source DB: PubMed Journal: J Mol Biol ISSN： 0022-2836 Impact factor: 5.469