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题名: Arsenic resistance strategy in Pantoea sp IMH: Organization, function and evolution of ars genes
作者: Wang, Liying; Zhuang, Xuliang; Zhuang, Guoqiang; Jing, Chuanyong
刊名: SCIENTIFIC REPORTS
出版日期: 2016-12-14
卷号: 6, 期号:0, 页码:1-9
DOI: 10.1038/srep39195
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: Pantoea sp. IMH is the only bacterium found in genus Pantoea with a high As resistance capacity, but its molecular mechanism is unknown. Herein, the organization, function, and evolution of ars genes in IMH are studied starting with analysis of the whole genome. Two ars systems - ars1 (arsR1B1C1H1) and ars2 (arsR2B2C2H2)-with low sequence homology and two arsC-like genes, were found in the IMH genome. Both ars1 and ars2 are involved in the As resistance, where ars1 is the major contributor at 15 degrees C and ars2 at 30 degrees C. The difference in the behavior of these two ars systems is attributed to the disparate activities of their arsR promoters at different temperatures. Sequence analysis based on concatenated ArsRBC indicates that ars1 and ars2 clusters may be acquired from Franconibacter helveticus LMG23732 and Serratia marcescens (plasmid R478), respectively, by horizontal gene transfer (HGT). Nevertheless, two arsC-like genes, probably arising from the duplication of arsC, do not contribute to the As resistance. Our results indicate that Pantoea sp. IMH acquired two different As resistance genetic systems by HGT, allowing the colonization of changing ecosystems, and highlighting the flexible adaptation of microorganisms to resist As.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35804
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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Recommended Citation:
Wang, Liying,Zhuang, Xuliang,Zhuang, Guoqiang,et al. Arsenic resistance strategy in Pantoea sp IMH: Organization, function and evolution of ars genes[J]. SCIENTIFIC REPORTS,2016,6(0):1-9.
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