Summary
TheKRS1 gene encodes the cytoplasmic form ofSaccharomyces cerevisiae lysyl-tRNA synthetase. TheKRS1 locus has been characterized. The lysyl-tRNA synthetase gene is unique in the yeast genome. The gene is located on the right arm of chromosome IV and disruption of the open reading frame leads to lethality. These results contrast with the situation encountered inEscherichia coli where lysyl-tRNA synthetase is coded by two distinct genes,lysS andlysU, and further address the possible biological significance of this gene duplication. The nucleotide sequence of the 3′-flanking region has been established. It encodes a long open reading frame whose nucleotide and amino acid structures are almost identical toPMR2, a cluster of tandemly repeated genes coding for P-type ion pumps. The sequence alterations relative toPMR2 are mainly located at the C-terminus of the protein.
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Communicated by C.P. Hollenberg
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Martinez, R., Latreille, MT. & Mirande, M. APMR2 tandem repeat with a modified C-terminus is located downstream from theKRS1 gene encoding lysyl-tRNA synthetase inSaccharomyces cerevisiae . Molec. Gen. Genet. 227, 149–154 (1991). https://doi.org/10.1007/BF00260720
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DOI: https://doi.org/10.1007/BF00260720