| Literature DB >> 30509945 |
Truc T Tran1, Nagendra N Mishra2,3, Ravin Seepersaud4,5, Lorena Diaz1,6,7, Rafael Rios1,6,7, An Q Dinh1, Cristina Garcia-de-la-Maria8, Michael J Rybak9, Jose M Miro8, Samuel A Shelburne10, Paul M Sullam4,5, Arnold S Bayer2,3, Cesar A Arias11,6.
Abstract
We investigated the ability of several recent clinical viridans group streptococci (VGS) bloodstream isolates (Streptococcus mitis/S. oralis subgroup) from daptomycin (DAP)-naive patients to develop DAP resistance in vitro All strains rapidly developed high-level and stable DAP resistance. Substitutions in two enzymes involved in the cardiolipin biosynthesis pathway were identified, i.e., CdsA (phosphatidate cytidylyltransferase) and PgsA (CDP-diacylglycerol-glycerol-3-phosphate-3-phosphatidyltransferase). These mutations were associated with complete disappearance of phosphatidylglycerol and cardiolipin from cell membranes. DAP interactions with the cell membrane differed in isolates with PgsA versus CdsA substitutions.Entities:
Keywords: CdsA; PgsA; Streptococcus mitiszzm321990; daptomycin resistance
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Year: 2019 PMID: 30509945 PMCID: PMC6355606 DOI: 10.1128/AAC.01531-18
Source DB: PubMed Journal: Antimicrob Agents Chemother ISSN: 0066-4804 Impact factor: 5.191