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• W2560491966 abstract "Acinetobacter baumannii (A. baumannii), is a Gram negative, coccobacilli and is associated with nosocomial infections. The bacterium has developed resistance to all known classes of antibiotics. Multi-drug resistant A. baumannii infections have been treated with the carbapenem group of antibiotics like imipenem and meropenem. Recent reports indicate that A. baumannii has acquired resistance to imipenem due to the secretion of carbapenem hydrolysing class D beta-lactamases (CHDLs). Such CHDLs found in carbapenem resistant A. baumannii belongs to OXA-143 and its variant OXA-231, which has Alanine (A) in place of Aspartic acid (D) at sequence position 224. The mutation of the OXA-231 CHDL alters the catalytic activity of the enzyme. Hence, the present study was carried out to find the probable mechanism of imipenem resistance in OXA-143 and OXA-231 (D224A) CHDLs expressing A. baumannii by employing molecular docking and dynamics. Methods Our study reveals that OXA-143 CHDL-imipenem complex has more binding affinity than OXA-231 (D224A) CHDL-imipenem complex. Our results indicate that there is a strong binding affinity of OXA-143 with imipenem when compared with OXA-243 and this mechanism might be the probable reason for imipenem resistance in OXA-143 expressing A. baumannii strains." @default.
• W2560491966 created "2016-12-16" @default.
• W2560491966 creator A5005963579 @default.
• W2560491966 creator A5044438568 @default.
• W2560491966 creator A5087677407 @default.
• W2560491966 date "2017-04-01" @default.
• W2560491966 modified "2023-09-25" @default.
• W2560491966 title "Exploring the resistance mechanism of imipenem in carbapenem hydrolysing class D beta-lactamases OXA-143 and its variant OXA-231 (D224A) expressing Acinetobacter baumannii: An in-silico approach" @default.
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• W2560491966 doi "https://doi.org/10.1016/j.compbiolchem.2016.12.001" @default.
• W2560491966 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28012345" @default.
• W2560491966 hasPublicationYear "2017" @default.
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