Poirel Laurent, Héritier Claire, Nordmann Patrice
Service de Bactériologie-Virologie, Université Paris XI, Hôpital de Bicêtre, Assistance Publique/Hôpitaux de Paris, Faculté de Médecine Paris-Sud, 94275 Le Kremlin-Bicêtre, France.
Antimicrob Agents Chemother. 2004 Jan;48(1):348-51. doi: 10.1128/AAC.48.1.348-351.2004.
A chromosome-encoded beta-lactamase gene from a Shewanella oneidensis reference strain was cloned and expressed in Escherichia coli. It encoded a carbapenem-hydrolyzing Ambler class D beta-lactamase, OXA-54, that shared 92% amino acid identity with the plasmid-encoded carbapenem-hydrolyzing oxacillinase OXA-48 from Klebsiella pneumoniae. This work suggests that Shewanella spp. may produce the progenitor of oxacillinases compromising the efficacy of imipenem in clinically relevant gram-negative pathogens.
从希瓦氏菌参考菌株中克隆出一个染色体编码的β-内酰胺酶基因,并在大肠杆菌中进行表达。它编码一种可水解碳青霉烯的安布勒D类β-内酰胺酶OXA-54,该酶与肺炎克雷伯菌中质粒编码的可水解碳青霉烯的苯唑西林酶OXA-48有92%的氨基酸同一性。这项研究表明,希瓦氏菌属可能产生了苯唑西林酶的祖系,从而影响了亚胺培南在临床相关革兰氏阴性病原体中的疗效。