AI-2-dependent gene regulation in Staphylococcus epidermidis.
AI-2-dependent gene regulation in Staphylococcus epidermidis.
复制标题
DOI:
10.1186/1471-2180-8-4
复制
发表时间:
2008-01-08
期刊:
影响因子:
4.2
通讯作者:
Otto, Michael
中科院分区:
文献类型:
--
作者:
Li, Min;Villaruz, Amer E.;Vadyvaloo, Viveka;Sturdevant, Daniel E.;Otto, Michael
Autoinducer 2 (AI-2), a widespread by-product of the LuxS-catalyzed S-ribosylhomocysteine cleavage reaction in the activated methyl cycle, has been suggested to serve as an intra- and interspecies signaling molecule, but in many bacteria AI-2 control of gene expression is not completely understood. Particularly, we have a lack of knowledge about AI-2 signaling in the important human pathogens Staphylococcus aureus and S. epidermidis. To determine the role of LuxS and AI-2 in S. epidermidis, we analyzed genome-wide changes in gene expression in an S. epidermidis luxS mutant and after addition of AI-2 synthesized by over-expressed S. epidermidis Pfs and LuxS enzymes. Genes under AI-2 control included mostly genes involved in sugar, nucleotide, amino acid, and nitrogen metabolism, but also virulence-associated genes coding for lipase and bacterial apoptosis proteins. In addition, we demonstrate by liquid chromatography/mass-spectrometry of culture filtrates that the pro-inflammatory phenol-soluble modulin (PSM) peptides, key virulence factors of S. epidermidis, are under luxS/AI-2 control. Our results provide a detailed molecular basis for the role of LuxS in S. epidermidis virulence and suggest a signaling function for AI-2 in this bacterium.
登录
查看更多内容
影响因子:
3.2
作者:
Balestrino, D;Haagensen, JAJ;Forestier, C
通讯作者:
Forestier, C
影响因子:
4.4
作者:
Auger, S;Krin, E;Gohar, M
通讯作者:
Gohar, M
影响因子:
3.1
作者:
MACK, D;NEDELMANN, M;LAUFS, R
通讯作者:
LAUFS, R
影响因子:
3.6
作者:
Taga, ME;Miller, ST;Bassler, BL
通讯作者:
Bassler, BL
影响因子:
3.2
作者:
Doherty, N;Holden, MTG;Winzer, K
通讯作者:
Winzer, K