氯化钠胁迫下金黄色葡萄球菌的细胞大小增加及肽聚糖肽间桥缩短，以及甘氨酸甜菜碱对其的逆转作用。
Increased cell size and shortened peptidoglycan interpeptide bridge of NaCl-stressed Staphylococcus aureus and their reversal by glycine betaine.
作者信息
Vijaranakul U, Nadakavukaren M J, de Jonge B L, Wilkinson B J, Jayaswal R K
机构信息
Department of Biological Sciences, Illinois State University, Normal 61790-4120, USA.
出版信息
J Bacteriol. 1995 Sep;177(17):5116-21. doi: 10.1128/jb.177.17.5116-5121.1995.
Abstract
Staphylococcus aureus cells grown in a defined medium under conditions of high ionic stress (2.5 M NaCl) were significantly larger than cells grown under unstressed conditions, even though the cells grew much more slowly under stressed conditions. Analysis of the structure of peptidoglycan from stressed cells showed a shorter interpeptide bridge than in peptidoglycan from unstressed cells. Glycine betaine inclusion in the high-NaCl medium resulted in cells with sizes and interpeptide bridges similar to those of cells grown under unstressed conditions.
摘要
在高离子胁迫条件（2.5 M NaCl）下于限定培养基中生长的金黄色葡萄球菌细胞，即便在胁迫条件下生长得慢得多，但相较于在无胁迫条件下生长的细胞显著更大。对胁迫条件下细胞的肽聚糖结构分析显示，其肽间桥比无胁迫条件下细胞的肽聚糖中的肽间桥短。在高NaCl培养基中加入甘氨酸甜菜碱会使细胞大小及肽间桥与在无胁迫条件下生长的细胞相似。
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