2WKH

Crystal structure of the acyl-enzyme OXA-10 K70C-Ampicillin at pH 7

Summary for 2WKH

• Entry DOI: 10.2210/pdb2wkh/pdb
• Related: 1E3U 1E4D 1EWZ 1FOF 1K4E 1K4F 1K54 1K55 1K56 1K57 1K6R 1K6S 2WGI 2WGV 2WGW 2WKI
• Descriptor: BETA-LACTAMASE OXA-10, (2R,4S)-2-[(R)-{[(2R)-2-amino-2-phenylacetyl]amino}(carboxy)methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid, SULFATE ION, ... (4 entities in total)
• Functional Keywords: hydrolase, antibiotic resistance, class d beta-lactamase, plasmid encoded
• Biological source: PSEUDOMONAS AERUGINOSA
• Total number of polymer chains: 2
• Total formula weight: 56588.16

Authors

Vercheval, L.,Bauvois, C.,Kerff, F.,Sauvage, E.,Guiet, R.,Charlier, P.,Galleni, M. (deposition date: 2009-06-11, release date: 2010-08-25, Last modification date: 2024-11-13)

Primary citation

Vercheval, L.,Bauvois, C.,Di Paolo, A.,Borel, F.,Ferrer, J.,Sauvage, E.,Matagne, A.,Frere, J.,Charlier, P.,Galleni, M.,Kerff, F.
Three Factors that Modulate the Activity of Class D Beta-Lactamases and Interfere with the Post-Translational Carboxylation of Lys70.
Biochem.J., 432:495-, 2010

PubMed Abstract: The activity of class D β-lactamases is dependent on Lys70 carboxylation in the active site. Structural, kinetic and affinity studies show that this post-translational modification can be affected by the presence of a poor substrate such as moxalactam but also by the V117T substitution. Val117 is a strictly conserved hydrophobic residue located in the active site. In addition, inhibition of class D β-lactamases by chloride ions is due to a competition between the side chain carboxylate of the modified Lys70 and chloride ions. Determination of the individual kinetic constants shows that the deacylation of the acyl-enzyme is the rate-limiting step for the wild-type OXA-10 β-lactamase.

PubMed: 21108605
DOI: 10.1042/BJ20101122

Experimental method

X-RAY DIFFRACTION (1.791 Å)