从马里亚纳海沟分离的 Alteromonas sp.

IF 1.3 4区 生物学 Q4 GENETICS & HEREDITY
Yue Lin , Min Zhang , Yu-Xiang Lai , Teng Liu , Meng Meng , Yan Sun , Yu Wang , Qing-Yu Dong , Chen-Xi Li , Meng-Xue Yu , Jin Cheng , Shu-Jun Liu , Xuan Shao , Nan Zhang , Chun-Yang Li
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引用次数: 0

摘要

二甲基硫代丙酸酯(DMSP)是海洋环境中无处不在的有机硫分子,在应激耐受、全球碳和硫循环以及趋化等方面发挥着重要作用。它是气候活性气体二甲基硫醚(DMS)的主要前体,而二甲基硫醚是从海洋转移到大气的最大生物硫天然来源。本文报告了菌株 M12 的完整基因组序列及其导入和利用 DMSP 的基因组特征。菌株 M12 的基因组包含一个环状染色体(5,012,782 bp),GC 含量为 40.88%。Alteromonas sp. M12能以DMSP为唯一碳源生长,并以DMSP为前体产生DMS。基因组分析表明,菌株 M12 含有一组参与 DMSP 裂解下游步骤的基因,但没有编码 DMSP 转运体或 DMSP 裂解酶的已知基因。结果表明,该菌株的基因组中含有新的 DMSP 转运和裂解基因,值得进一步研究。将DMSP导入细胞可能是菌株M12适应马里亚纳海沟静水压环境的一种策略,因为DMSP可用作静水压保护剂。这项研究揭示了深海细菌分解 DMSP 的过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genomic analysis of Alteromonas sp. M12 isolated from the Mariana Trench reveals its role in dimethylsulfoniopropionate cycling

Dimethylsulfoniopropionate (DMSP) is a ubiquitous organosulfur molecule in marine environments with important roles in stress tolerance, global carbon and sulfur cycling, and chemotaxis. It is the main precursor of the climate active gas dimethyl sulfide (DMS), which is the greatest natural source of bio‑sulfur transferred from ocean to atmosphere. Alteromonas sp. M12, a Gram-negative and aerobic bacterium, was isolated from the seawater samples collected from the Mariana Trench at the depth of 2500 m. Here, we report the complete genome sequence of strain M12 and its genomic characteristics to import and utilize DMSP. The genome of strain M12 contains one circular chromosome (5,012,782 bp) with the GC content of 40.88%. Alteromonas sp. M12 can grow with DMSP as a sole carbon source, and produced DMS with DMSP as a precursor. Genomic analysis showed that strain M12 contained a set of genes involved in the downstream steps of DMSP cleavage, but no known genes encoding DMSP transporters or DMSP lyases. The results indicated that this strain contained novel DMSP transport and cleavage genes in its genome which warrants further investigation. The import of DMSP into cells may be a strategy of strain M12 to adapt the hydrostatic pressure environment in the Mariana Trench, as DMSP can be used as a hydrostatic pressure protectant. This study sheds light on the catabolism of DMSP by deep-sea bacteria.

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来源期刊
Marine genomics
Marine genomics 生物-遗传学
CiteScore
3.60
自引率
5.30%
发文量
50
审稿时长
29 days
期刊介绍: The journal publishes papers on all functional and evolutionary aspects of genes, chromatin, chromosomes and (meta)genomes of marine (and freshwater) organisms. It deals with new genome-enabled insights into the broader framework of environmental science. Topics within the scope of this journal include: • Population genomics and ecology • Evolutionary and developmental genomics • Comparative genomics • Metagenomics • Environmental genomics • Systems biology More specific topics include: geographic and phylogenomic characterization of aquatic organisms, metabolic capacities and pathways of organisms and communities, biogeochemical cycles, genomics and integrative approaches applied to microbial ecology including (meta)transcriptomics and (meta)proteomics, tracking of infectious diseases, environmental stress, global climate change and ecosystem modelling.
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