TEM-28 from an Escherichia coli clinical isolate is a member of the His-164 family of TEM-1 extended-spectrum beta-lactamases
Bradford, P.A.; Jacobus, N.V.; Bhachech, N.; Bush, K.
Antimicrobial Agents and ChemoTherapy 40(1): 260-262
1996
ISSN/ISBN: 0066-4804 PMID: 8787920 Document Number: 467373
TEM-28 (pI 6.1), expressed by an Escherichia coli clinical isolate, is a novel beta-lactamase which hydrolyzed ceftazidime, cefotaxime, and aztreonam with rates of 25, 1.1, and 5.6, respectively, relative to that for benzylpenicillin (100). The nucleotide sequence of bla-TEM-28 differed from that of bla-TEM-1 by two basic changes, resulting in amino acid substitutions of Arg-164 to His and Glu-240 to Lys.
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