Phenotypic, biochemical and genetic analysis of KPC-41, a KPC-3 variant conferring resistance to ceftazidime-avibactam and exhibiting reduced carbapenemase activity.
Détails
ID Serval
serval:BIB_1ED69763A009
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Phenotypic, biochemical and genetic analysis of KPC-41, a KPC-3 variant conferring resistance to ceftazidime-avibactam and exhibiting reduced carbapenemase activity.
Périodique
Antimicrobial agents and chemotherapy
ISSN
1098-6596 (Electronic)
ISSN-L
0066-4804
Statut éditorial
Publié
Date de publication
21/11/2019
Peer-reviewed
Oui
Volume
63
Numéro
12
Pages
e01111-19
Langue
anglais
Notes
Publication types: Journal Article
Résumé
A novel KPC variant, KPC-41, was identified in a Klebsiella pneumoniae clinical isolate from Switzerland. This ß-lactamase possessed a three amino-acid insertion (Pro-Asn-Lys) located between amino acids 269 and 270 compared to the KPC-3 amino acid sequence. Cloning and expression of the bla <sub>KPC-41</sub> gene in Escherichia coli, followed by determination of MIC values and kinetic parameters, showed that KPC-41, compared to KPC-3, has an increased affinity to ceftazidime and a decreased sensitivity to avibactam, leading to resistance to ceftazidime-avibactam once produced in K. pneumoniae Furthermore, KPC-41 exhibited a drastic decrease of its carbapenemase activity. This report highlights that a diversity of KPC variants conferring resistance to ceftazidime-avibactam already circulate in Europe.
Pubmed
Web of science
Création de la notice
20/09/2019 22:40
Dernière modification de la notice
27/05/2023 6:50
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