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Transcriptional response of Thialkalivibrio versutus D301 to different sulfur sources and identification of the sulfur oxidation pathways

文献类型： 外文期刊

作者： Liu, Zhi-Xia 1 ; Yang, Mao-Hua 1 ; Mu, Ting-Zhen 1 ; Liu, Jin-Long 2 ; Zhang, Xiang 3 ; Xing, Jian-Min 1 ;

作者机构： 1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

2.Hebei Univ Sci & Technol, Sch Biol & Engn, Shijiazhuang 050018, Hebei, Peoples R China

3.Shandong Acad Agr Sci, Inst Agrofood Sci & Technol, Jinan 250100, Peoples R China

关键词： Thialkalivibrio versutus D301; Thiosulfate; Chemical sulfur; sulfur oxidation pathway; Transcriptome

期刊名称：JOURNAL OF BIOTECHNOLOGY （ 影响因子：3.503； 五年影响因子：3.185 ）

ISSN： 0168-1656

年卷期： 2021 年 329 卷

页码：

收录情况： SCI

摘要： The genus Thialkalivibrio plays an essential role in the biological desulfurization system. However, to date, the sulfur oxidation pathways of Thialkalivibrio are not clearly understood. Here, we performed transcriptomic analysis on Thialkalivibrio versutus D301 with either thiosulfate or chemical sulfur as the sulfur source to understand it. The results show that T. versutus D301 has a higher growth rate and sulfur oxidation activity when thiosulfate is utilized. The use of chemical sulfur as sulfur source leads to decreased expression of genes involved in carbon metabolism, ribosome synthesis and oxidative phosphorylation in T. versutus D301. Potentially due to the adsorption to sulfur particles, the genes related to flagellum assembly and motivation are significantly induced in T. versutus D301 in the presence of chemical sulfur. In the periplasm, both thiosulfate and polysulfide from the chemical sulfur are oxidized to sulfate via the similar truncated Sox system (SoxAXYZB). Then, part of polysulfide reached to cytoplasm through an unidentified route is oxidized to sulfite by the Dsr-like system. The sulfite in the cytoplasm is further catalyzed to sulfate by SoxB or SoeABC. Overall, the difference in the oxidation rates of D301 can be mainly attributed to the bioavailability of the two sulfur sources, not the sulfur oxidation pathways.

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