2016.03.21，我院孫寶林教授研究組在Antimicrobial Agents and Chemotherapy發(fā)表題為：“SpoVG Regulates Cell Wall Metabolism and Oxacillin Resistance in Methicillin-Resistant Staphylococcus aureus?Strain N315”的研究論文
作者：劉曉雨、張士杰、孫寶林
Abstract：
Increasing cases of infections caused by methicillin-resistant Staphylococcus aureus?(MRSA) strains in healthy individuals have raised concerns worldwide. MRSA strains are resistant to almost the entire family of β-lactam antibiotics due to the acquisition of an extra penicillin-binding protein PBP2a. Studies have shown that spoVG?is involved in oxacillin resistance, while the regulatory mechanism remains elusive. Here, we have found that SpoVG plays a positive role in oxacillin resistance through promoting cell wall synthesis and inhibiting cell wall degradation in MRSA strain N315. Deletion of spoVG?in strain N315 led to a significant decrease in oxacillin resistance and a dramatic increase in Triton X-100-induced autolytic activity simultaneously. The real-time quantitative reverse transcription-PCR revealed that the expression of 8 genes related to cell wall metabolism or oxacillin resistance was altered in the spoVG?mutant. Electrophoretic mobility shift assay indicated that SpoVG can directly bind to the putative promoter regions of lytN?(murein hydrolase), femA, and lytSR?(the two-component system). These findings suggest a molecular mechanism in which SpoVG modulates oxacillin resistance by regulating cell wall metabolism in MRSA.
DOI information: 10.1128/AAC.00026-16
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