The Pathway of Sulfide Oxidation to Octasulfur Globules in the Cytoplasm of Aerobic Bacteria
The Pathway of Sulfide Oxidation to Octasulfur Globules in the Cytoplasm of Aerobic Bacteria
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需氧细菌细胞质中硫化物氧化成八硫球的途径
DOI:
10.1128/aem.01941-21
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发表时间:
2021-12
影响因子:
4.4
通讯作者:
Luying Xun
中科院分区:
文献类型:
--
作者:
Tianqi Wang;Mingxue Ran;Xiaoju Li;Yequn Liu;Yufeng Xin;Honglei Liu;Huaiwei Liu;Yongzhen Xia;Luying Xun
Our results support a process of H2S oxidation to produce octasulfur globules via sulfide:quinone oxidoreductase (SQR) catalysis and spontaneous reactions in the bacterial cytoplasm. Since the process is an important event in geochemical cycling, a better understanding facilitates further studies and provides theoretical support for using heterotrophic bacteria with SQR to oxidize toxic H2S into sulfur globules for recovery. ABSTRACT Sulfur-oxidizing bacteria can oxidize hydrogen sulfide (H2S) to produce sulfur globules. Although the process is common, the pathway is unclear. In recombinant Escherichia coli and wild-type Corynebacterium vitaeruminis DSM 20294 with sulfide:quinone oxidoreductase (SQR) but no enzymes to oxidize zero valence sulfur, SQR oxidized H2S into short-chain inorganic polysulfide (H2Sn, n ≥ 2) and organic polysulfide (RSnH, n ≥ 2), which reacted with each other to form long-chain GSnH (n ≥ 2) and H2Sn before producing octasulfur (S8), the main component of elemental sulfur. GSnH also reacted with glutathione (GSH) to form GSnG (n ≥ 2) and H2S; H2S was again oxidized by SQR. After GSH was depleted, SQR simply oxidized H2S to H2Sn, which spontaneously generated S8. S8 aggregated into sulfur globules in the cytoplasm. The results highlight the process of sulfide oxidation to S8 globules in the bacterial cytoplasm and demonstrate the potential of using heterotrophic bacteria with SQR to convert toxic H2S into relatively benign S8 globules. IMPORTANCE Our results provide evidence of H2S oxidation producing octasulfur globules via sulfide:quinone oxidoreductase (SQR) catalysis and spontaneous reactions in the bacterial cytoplasm. Since the process is an important event in geochemical cycling, a better understanding facilitates further studies and provides theoretical support for using heterotrophic bacteria with SQR to oxidize toxic H2S into sulfur globules for recovery.
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影响因子:
11.4
作者:
Kamyshny, A;Goifman, A;Lev, O
通讯作者:
Lev, O
DOI:
10.1038/ismej.2017.125
发表时间:
2017-12
期刊:
The ISME journal
影响因子:
--
作者:
Xia Y;Lü C;Hou N;Xin Y;Liu J;Liu H;Xun L
通讯作者:
Xun L
影响因子:
2.6
作者:
Yingqian Ren;Haizhou Shui;C. Peng;Honglai Liu;Ying Hu
通讯作者:
Yingqian Ren;Haizhou Shui;C. Peng;Honglai Liu;Ying Hu
DOI:
--
发表时间:
2008
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
6.4
作者:
Glazyrina J;Materne EM;Dreher T;Storm D;Junne S;Adams T;Greller G;Neubauer P
通讯作者:
Neubauer P