Article
Mutagenesis of amino acid residues in the SHV-1 beta-lactamase: the premier role of Gly238Ser in penicillin and cephalosporin resistance.
Biochimica et biophysica acta - 5 May 2001
Hujer A M, Hujer K M, Bonomo R A
Abstract excerpt
The recent availability of the SHV-1 beta-lactamase crystal structure provides a framework for the understanding of the functional role of amino acid residues in this enzyme. To that end, we have constructed by site-directed mutagenesis 18 variants of the SHV beta-lactamase: an extended spectrum group: Gly238Ser, Gly238Ser-Glu240Lys, Asp104Lys-Gly238Ser, Asp104Lys-Thr235Ser-Gly238Ser, Asp179Asn, Arg164His, and...
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