Zheng Rikuan, Wu Shimei, Sun Chaomin
CAS Key Laboratory of Experimental Marine Biology & Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
Microorganisms. 2021 Feb 19;9(2):429. doi: 10.3390/microorganisms9020429.
Sulfur cycling is primarily driven by sulfate reduction mediated by sulfate-reducing bacteria (SRB) in marine sediments. The dissimilatory sulfate reduction drives the production of enormous quantities of reduced sulfide and thereby the formation of highly insoluble metal sulfides in marine sediments. Here, a novel sulfate-reducing bacterium designated SRB007 was isolated and purified from the deep-sea cold seep and proposed to represent a novel species in the genus of . A detailed description of the phenotypic traits, phylogenetic status and central metabolisms of strain SRB007 allowed the reconstruction of the metabolic potential and lifestyle of a novel member of deep-sea SRB. Notably, SRB007 showed a strong ability to resist and remove different heavy metal ions including Co, Ni, Cd and Hg. The dissimilatory sulfate reduction was demonstrated to contribute to the prominent removal capability of SRB007 against different heavy metals via the formation of insoluble metal sulfides.
硫循环主要由海洋沉积物中硫酸盐还原细菌（SRB）介导的硫酸盐还原驱动。异化硫酸盐还原推动了大量还原态硫化物的产生，从而在海洋沉积物中形成高度不溶性的金属硫化物。在此，从深海冷泉中分离并纯化出一种新型硫酸盐还原细菌，命名为SRB007，并提议其代表该属中的一个新物种。对菌株SRB007的表型特征、系统发育地位和中心代谢的详细描述，有助于重建深海SRB新成员的代谢潜力和生活方式。值得注意的是，SRB007表现出强大的抵抗和去除包括钴、镍、镉和汞在内的不同重金属离子的能力。异化硫酸盐还原被证明通过形成不溶性金属硫化物，有助于SRB007对不同重金属的显著去除能力。
