A two- component system signaling hub controls enterococcal membrane remodeling in response to daptomycin

• 成果类型: Article
• 署名作者: Colomer-Winter, Cristina; Nair, Zeus J.; Chua, Jerome Y. J.; Jabli, Soukayna; Roch, Melanie; Cazenave-Gassiot, Amaury; Sierra, Roberto; Andrey, Diego O.; Chng, Shu-Sin; Kline, Kimberly A.
• 署名单位: University of Geneva; National University of Singapore; Nanyang Technological University; Massachusetts Institute of Technology (MIT); Nanyang Technological University; National University of Singapore; National University of Singapore; University of Geneva; University of Geneva; University of Geneva; National University of Singapore; National University of Singapore; Nanyang Technological University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-8424; 1091-6490
• DOI: 10.1073/pnas.2532437123
• 发表日期: 2026-04-28
• 页码: e2532437123
• 关键词: two-component systems; daptomycin resistance; Enterococcus faecalis; lipid remodeling; LTA; LIPOTEICHOIC ACID SYNTHESIS; LIPID HOMEOSTASIS; biofilm formation; resistance; faecalis; identification; play

摘要

Daptomycin is a last resort antibiotic used to treat vancomycin-resistant enterococcal infections, but daptomycin resistance (DAPR) arises quickly during treatment. Resistance is due to sequential acquisition of point mutations in the two-component system LiaFSR and in cardiolipin synthases and is associated with alteration of phospholipid and glycolipid membrane composition. The molecular mechanisms underlying these lipid changes are currently unknown. Similarly, it is unclear why mutations in liaFSR occur prior to mutations in cls. We found that Enterococcus faecalis remodels membrane composition as aphenotypic response to daptomycin that parallels the membrane composition of DAPR strains. The enrichment in glycolipids that follows antibiotic exposure is due to LtaS1, the main lipoteichoic acid (LTA) synthase of E. faecalis. LTA production is primarily governed by LiaFSR and SapRS, which directly couples antibiotic sensing with membrane lipid remodeling. Together, our results provide a unifying mechanism that drives phenotypic membrane fortification in a gram-positive pathogen which simultaneously predisposes the cell to acquire genetic high-level daptomycin resistance.