Matagne A, Ledent P, Monnaie D, Felici A, Jamin M, Raquet X, Galleni M, Klein D, François I, Frère J M
Laboratoire d'Enzymologie, Université de Liège, Sart-Tilman, Belgium.
Antimicrob Agents Chemother. 1995 Jan;39(1):227-31. doi: 10.1128/AAC.39.1.227.
A detailed kinetic study of the interactions between BRL 42715, a beta-lactamase-inhibiting penem, and various beta-lactamases (EC 3.5.2.6) and D-alanyl-D-alanine peptidases (DD-peptidases, EC 3.4.16.4) is presented. The compound was a very efficient inactivator of all active-site serine beta-lactamases but was hydrolyzed by the class B, Zn(2+)-containing enzymes, with very different kcat values. Inactivation of the Streptomyces sp. strain R61 extracellular DD-peptidase was not observed, and the Actinomadura sp. strain R39 DD-peptidase exhibited a low level of sensitivity to the compound.
本文介绍了β-内酰胺酶抑制性青霉烯类药物BRL 42715与各种β-内酰胺酶(EC 3.5.2.6)和D-丙氨酰-D-丙氨酸肽酶(DD-肽酶,EC 3.4.16.4)之间相互作用的详细动力学研究。该化合物是所有活性位点丝氨酸β-内酰胺酶的高效失活剂,但会被B类含锌(2+)酶水解,其催化常数(kcat)值差异很大。未观察到链霉菌属R61菌株细胞外DD-肽酶的失活,而马杜拉放线菌属R39菌株的DD-肽酶对该化合物表现出较低的敏感性。