从中国南海沉积物中分离的深海细菌 Salinimicrobium sp.

IF 1.3 4区 生物学 Q4 GENETICS & HEREDITY Marine genomics Pub Date : 2024-06-18 DOI:10.1016/j.margen.2024.101125
Shijie Bai , Kun Shang , Shuqian Zeng , Ziming Huang , Zhuang Han
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引用次数: 0

摘要

Salinimicrobium sp. 3283s是一种好氧、产金黄色色素的黄杆菌科细菌,从中国南海1751米深处的沉积物中分离出来。该菌株只有一个由 3,702,683 bp 组成的单环染色体,G+C 含量为 41.41%,没有环状质粒。共获得 3257 个蛋白质编码基因、45 个 tRNA、9 个 rRNA 和 13 个 sRNA 基因。从基因的功能注释来看,3283s菌株与分离自中国南海、深度相近的Salinimicrobium oceani J15B91菌株差异较大,而与马里亚纳海沟来源的Salinimicrobium profundisediminis MT39菌株更为相似,在系统发育分类地位上更为接近,这表明3283s菌株具有更强的适应深海环境的潜力。此外,高压模拟还证实,菌株 3283s 可以在 30 兆帕和 60 兆帕的静水压环境中生长,而且在 30 兆帕静水压环境中的生长情况比在 60 兆帕静水压环境中更好。此外,我们还在 3283s 菌株中发现了大量能促进细菌更好地适应深海低氧和高静水压(HHP)环境的基因,如抗氧化色素的生物合成酶、编码对氧亲和力增强的细胞色素的基因、适应 HHP 的蛋白质以及编码无鞭毛情况下依赖 TonB 的转运体的基因。
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Genome analysis of Salinimicrobium sp. 3283s, a deep-sea bacterium isolated from the sediments of South China Sea, China

Salinimicrobium sp. 3283s is an aerobic, golden-yellow pigment-producing, Flavobacteriaceae bacterium isolated from the sediments at the depth of 1751 m in the South China Sea. In this study, we present the complete genome sequence of strain 3283s, which only have a single circular chromosome comprising 3,702,683 bp with 41.41% G + C content and no circular plasmid. In total, 3257 protein coding genes, 45 tRNA, 9 rRNA, and 13 sRNA genes were obtained. In terms of the function of gene annotation, strain 3283s was more different from Salinimicrobium oceani J15B91, which was isolated from the South China Sea at a similar depth, and more similar to a Mariana Trench-derived strain Salinimicrobium profundisediminis MT39, which was closer in phylogenetic taxonomic status, suggesting that strain 3283s possesses a stronger potential to adapt to the deep-sea environment. Furthermore, the high- pressure simulations also confirmed that strain 3283s can grow in both 30 MPa and 60 MPa hydrostatic pressure environments, and that it grows better in 30 MPa hydrostatic pressure environments than in 60 MPa hydrostatic pressure environments. In addition, we found a large number of genes in strain 3283s that can promote better adaptation of the bacteria to the low oxygen and high hydrostatic pressure (HHP) environment of the deep sea, such as biosynthetic enzymes of antioxidant pigments, genes encoding cytochromes with enhanced affinity for oxygen, proteins for adaptation to HHP, and genes encoding TonB-dependent transporters in the absence of flagella.

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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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