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On May 27th, the international biology journal ISME J published an article entitled A novel bacterial thiosulfate on the anew of the formation of the formation of the formation of zero-valent-sting ovul in deep sea, reporting on the research results of Sun Chaoyu Task Force of the Institute of Oceanography of the Deep Sea Cold Springs Environment, which form a new way of monosulfuric sulfur, which provides an important theoretical basis for explaining the widespread distribution of sulfur monoligate in cold spring vents in the South China Sea.
in the early scientific examination survey, the ocean Zhangxin research group based on Raman spectroscopy observed that China's South China Sea cold spring environment is rich in single sulfur content, but the cause of formation is not clear.
and microorganisms are the main drivers of sulfur cycle, which have important contributions to the deep-sea sulfur cycle, but are limited to sampling difficulties, microbial stoicism and other factors, based on deep-sea microorganisms involved in sulfur cycle to form monosulfur mechanism simply know very little.
in response to this situation, Sun Chaoxuan team with the help of "science" science and technology ship from the Typical cold spring environment in the South China Sea to obtain a high-efficiency sulfur oxide to form monosulfur yasthibery bacteria Erythrobacter sp.21-3, Raman spectroscopy to determine its mediated formation of single sulfur structure as ring S8.
In order to better understand the molecular mechanism of the bacteria's formation of monosulfur, the research team, by means of proteomics, molecular genetics and analytical chemistry, respectively, revealed the key genes and corresponding functions of Erythrobacter sp.21-3 to drive sodium sulphate to form monosulfur, and proposed a new sulfur oxidation pathway that had never been discovered before.
in this pathway, the first step of the reaction is mediated by the Thiosulfate dehydrogenase (TsdA) protein, which oxidizes two sulfuric sulphate roots to produce a link to four sulphate roots, and then Thiosulfohydrolase (SoxB) hydrolysis the sulphate base on the four sulfate roots, with the remaining sulfuric aggregates forming polysulpy (S8).
in certain cases, polysulfur S8 is oxidized to sulphate by Sulfur dioxygenase (SdoA or SdoB) and eventually to sulphate. Further research results based on macro genome in the
show that the pathway is widely present in the micro-organisms of bacillus and other deformed bacteria and Bacillus bacteria, indicating that the new sulfur oxidation pathway is an important contribution to the deep-sea sulfur element circulation.
the research results not only enrich the microbial sulfur oxidation pathway, but also provide an important theoretical basis for the study of the new mechanism of the existence of a large number of sulfur monobacteria in cold spring vents in the South China Sea and the circulation of deep-sea sulfur elements. Zhang Jing, a doctoral student at
Ocean Institute, is the first author of the article and Sun Chaoxuan is the author of the newsletter.
research has been jointly funded by the Chinese Academy of Sciences' strategic pilot project, the Comma Association's "Deep Sea Biological Resources Program" and the National Key Research and Development Program.
Source: Institute of Oceanography.