Mannitol utilisation is required for protection of Staphylococcus aureus from human skin antimicrobial fatty acids.

Mannitol utilisation is required for protection of Staphylococcus aureus from human skin antimicrobial fatty acids.
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保护金黄色葡萄球菌免受人体皮肤抗菌脂肪酸的保护需要甘露醇利用。

DOI:
10.1371/journal.pone.0067698
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Horsburgh MJ
Horsburgh MJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kenny JG;Moran J;Kolar SL;Ulanov A;Li Z;Shaw LN;Josefsson E;Horsburgh MJ

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甘露醇(Mtl)发酵,随后产生酸,是金黄色葡萄球菌的一个物种特征,并与该属的大多数其他成员区别开来。编码Mtl-1-P脱氢酶的基因mtlD失活被发现在抗菌脂肪酸亚油酸存在下显著降低存活。我们证明糖醇对这种膜作用抗菌剂有增强作用。细胞代谢物分析显示,在指数生长过程中,mtlD突变体积累了高水平的Mtl和Mtl- p。后者的代谢物未在其等基因亲本菌株或整个mtlABFD操纵子的缺失突变体中检测到。此外,mtlD突变株对H2O2的MIC降低,但在脓毒性关节炎模型中毒力未受影响。
Mannitol (Mtl) fermentation, with the subsequent production of acid, is a species signature of Staphylococcus aureus, and discriminates it from most other members of the genus. Inactivation of the gene mtlD, encoding Mtl-1-P dehydrogenase was found to markedly reduce survival in the presence of the antimicrobial fatty acid, linoleic acid. We demonstrate that the sugar alcohol has a potentiating action for this membrane-acting antimicrobial. Analysis of cellular metabolites revealed that, during exponential growth, the mtlD mutant accumulated high levels of Mtl and Mtl-P. The latter metabolite was not detected in its isogenic parent strain or a deletion mutant of the entire mtlABFD operon. In addition, the mtlD mutant strain exhibited a decreased MIC for H2O2, however virulence was unaffected in a model of septic arthritis.
DOI: 10.1016/s0140-6736(09)61999-1
发表时间: 2010-05-01
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