Arsenite and Arsenate Metabolism of Sinorhizobium sp M14 Living in the Extreme Environment of the Zloty Stok Gold Mine
Arsenite and Arsenate Metabolism of Sinorhizobium sp M14 Living in the Extreme Environment of the Zloty Stok Gold Mine
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DOI：
10.1080/01490450802402836
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发表时间：
2008-01-01
影响因子：
2.3
通讯作者：
Sklodowska, Aleksandra
中科院分区：
文献类型：
--
作者：
Drewniak, Lukasz;Matlakowska, Renata;Sklodowska, Aleksandra
从某金矿富砷沉积物中分离到一株新的亚砷酸盐氧化细菌。该菌株命名为M14，被鉴定为中华根瘤菌属，能够在极高浓度的砷酸盐（高达250 mM）和亚砷酸盐（高达20 mM）中有效生长。我们对这种耐冷中华根瘤菌的研究表明，它利用两种机制来适应矿山中高浓度的砷。它能够通过Ars系统（仅解毒）将砷酸盐还原为亚砷酸盐，同时可以在呼吸过程中氧化亚砷酸盐，从而产生生长所需的能量。
A new arsenite-oxidizing bacterium has been isolated from the arsenic-rich bottom sediments of a gold mine. This strain, designated M14 and identified as a Sinorhizobium species, is able to grow efficiently in extremely high concentrations of arsenate (up to 250 mM) and arsenite (up to 20 mM). Our studies of this psychrotolerant Sinorhizobium isolate revealed that it utilizes two mechanisms to adapt to the high concentrations of arsenic occurring in the mine. It is able to reduce arsenate to arsenite by means of the Ars system (detoxification only) and can simultaneously oxidize arsenite in a respiratory process, which generates energy for growth.