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1pio

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AN ENGINEERED STAPHYLOCOCCUS AUREUS PC1 BETA-LACTAMASE THAT HYDROLYSES THIRD GENERATION CEPHALOSPORINS

Structural highlights

1pio is a 2 chain structure with sequence from Staphylococcus aureus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.8Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

BLAC_STAAU

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The beta-lactamase from Staphylococcus aureus PC1 has been cloned into an Escherichia coli vector for site-directed mutagenesis and high-level protein expression. A mutant enzyme has been produced in which Ala238 is replaced by a serine, and Ile239 is deleted (A238S:I239del). The engineered enzyme hydrolyses third-generation cephalosporins substantially more rapidly than the parental enzyme does, while hydrolysis of benzylpenicillin is slower with the mutant than with the wild-type and native enzymes. The mutant beta-lactamase has been crystallized and the structure determined and refined at 2.8 A resolution. The disposition of the beta-strand which forms the side of the active site is altered in comparison with the native S. aureus beta-lactamase structure, widening the active site cleft and providing space to accommodate the bulky side-chains of the third-generation cephalosporins.

An engineered Staphylococcus aureus PC1 beta-lactamase that hydrolyses third-generation cephalosporins.,Zawadzke LE, Smith TJ, Herzberg O Protein Eng. 1995 Dec;8(12):1275-85. PMID:8869640^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Zawadzke LE, Smith TJ, Herzberg O. An engineered Staphylococcus aureus PC1 beta-lactamase that hydrolyses third-generation cephalosporins. Protein Eng. 1995 Dec;8(12):1275-85. PMID:8869640