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- W2883018132 abstract "Vancomycin resistance in Enterococci and its transfer to methicillin-resistant Staphylococcus aureus are challenging problems in health care institutions worldwide. High-level vancomycin resistance is conferred by acquiring either transposable elements of the VanA or VanB type. Enterococcus faecalis VanYB in the VanB-type operon is a d,d-carboxypeptidase that recognizes the peptidyl-d-Ala4-d-Ala5 extremity of peptidoglycan and hydrolyses the terminal d-Ala on the extracellular side of the cell wall, thereby increasing the level of glycopeptide antibiotics resistance. However, at the molecular level, it remains unclear how VanYB manipulates peptidoglycan peptides for vancomycin resistance. In this study, we have determined the crystal structures of E. faecalis VanYB in the d-Ala-d-Ala-bound, d-Ala-bound, and -unbound states. The interactions between VanYB and d-Ala-d-Ala observed in the crystal provide the molecular basis for the recognition of peptidoglycan substrates by VanYB. Moreover, comparisons with the related VanX and VanXY enzymes reveal distinct structural features of E. faecalis VanYB around the active-site cleft, thus shedding light on its unique substrate specificity. Our results could serve as the foundation for unravelling the molecular mechanism of vancomycin resistance and for developing novel antibiotics against the vancomycin-resistant Enterococcus species." @default.
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- W2883018132 date "2018-11-01" @default.
- W2883018132 modified "2023-10-14" @default.
- W2883018132 title "Structural basis for the substrate recognition of peptidoglycan pentapeptides by Enterococcus faecalis VanYB" @default.
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- W2883018132 doi "https://doi.org/10.1016/j.ijbiomac.2018.07.081" @default.
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