The quest for a unified view of bacterial land colonization

文献类型： 外文期刊

第一作者： Wu, Hao

作者： Wu, Hao;Yu, Jun;Zhang, Zhang;Fang, Yongjun;Fang, Yongjun

作者机构：

关键词： adaptive mutagenesis;bacterial land colonization;GC content;genome expansion;HGT;metagenomics

期刊名称：ISME JOURNAL （ 影响因子：10.302； 五年影响因子：12.284 ）

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收录情况： SCI

摘要： Exploring molecular mechanisms underlying bacterial water-to-land transition represents a critical start toward a better understanding of the functioning and stability of the terrestrial ecosystems. Here, we perform comprehensive analyses based on a large variety of bacteria by integrating taxonomic, phylogenetic and metagenomic data, in the quest for a unified view that elucidates genomic, evolutionary and ecological dynamics of the marine progenitors in adapting to nonaquatic environments. We hypothesize that bacterial land colonization is dominated by a single-gene sweep, that is, the emergence of dnaE2 derived from an early duplication event of the primordial dnaE, followed by a series of niche-specific genomic adaptations, including GC content increase, intensive horizontal gene transfer and constant genome expansion. In addition, early bacterial radiation may be stimulated by an explosion of land-borne hosts (for example, plants and animals) after initial land colonization events.

分类号： Q93

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