Arsenic stress in bacteria: involvement in the colonization of arsenic-contaminated environments

摘要：

We investigated the effect of high concentration of arsenic on Herrniniimonas arsenicoxydans, a bacterium isolated from an arse-nic-contaminated environment, which is able to oxidize arsenite (As III) to arsenate (As V). We used a combination of a pro-teornic approach, a random mutational analysis and electron microscopy studies. In addition to proteins and genes be found to be involved in resistance mechanisms, this study led to the identification of various functional pathways linked to the metabolism and the structure of the cell. Moreover, cells respond to high concentration of arsenic by the synthesis of a biofilm, which is able to sequester the metalloid. All these newly identified mechanisms may be involved in the colonization of arsenic-contaminated envi-ronments.

关键词： arsenic biofilms Herminiirnonas arsenicoacydans metal sequestration stress proteins

作者: D. Muller M. C. Lett C. Carapito S. Koechler S. Weiss A. Salmeron N. PerdriaP D. Lievremont F. Arsene-Ploetze Ph. Bertin

作者单位: GMGM, UMRT156 CNRS & Universite Louis Pasteur, Strasbourg, France LSMBO, UMR7509 CNRS & Universite Louis Pasteur, Strasbourg, France CGS, UMR7517 CNRS & Universite Louis Pasteur, Strasbourg, France

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 544-545

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）