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FEBS Lett. 1988 Apr 11;231(1):217-20.

Single amino acid substitution between SHV-1 beta-lactamase and cefotaxime-hydrolyzing SHV-2 enzyme.

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1
Muséum National Histoire Naturelle, CNRS UA 401, Paris, France.

Abstract

SHV-2 beta-lactamase was purified from an overproducing variant of a clinical isolate of Escherichia coli resistant to cefotaxime. Pure protein was digested by trypsin and Lys-C endoproteinase. Proteolytic peptides, isolated by reverse-phase HPLC, were submitted to manual Edman degradation and aligned by homology with the sequence of SHV-1 beta-lactamase. A putative amino acid sequence was deduced. Structural comparison revealed that SHV-2 differed from SHV-1 by only one amino acid, Gly----Ser, at position 213 of the mature protein.

PMID:
3129309
DOI:
10.1016/0014-5793(88)80734-8
[Indexed for MEDLINE]
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