A novel alphaproteobacterium with a small genome identified from the digestive gland of multiple species of abalone
A novel alphaproteobacterium with a small genome identified from the digestive gland of multiple species of abalone
复制标题
从多种鲍鱼的消化腺中鉴定出一种具有小基因组的新型α变形菌
DOI：
10.1111/1758-2229.12845
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发表时间：
2020
影响因子：
3.3
通讯作者：
Zongze Shao
中科院分区：
文献类型：
--
作者：
Zhaobin Huang;Jillian M.Petersen;Joran Martijn;Thijs J.G.Ettema;Zongze Shao
We identified an alphaproteobacterium in the digestive gland of the abalone speciesHaliotis discus hannai. This phylotype dominated our 16S rRNA clone libraries from the digestive gland ofH. discus hannai. Diversity surveys revealed that this phylotype was associated withH. discus hannaiand also in another host species,H. gigantea.Whole genome phylogenies placed this bacterium as a new member affiliated with the familyRhodospirillaceaeinAlphaproteobacteria. Gene annotation revealed a nearly complete glycolysis pathway but no TCA cycle, but the presence of anaerobic ribonucleoside‐triphosphate reductase and oxygen‐insensitive NAD(P)H‐dependent nitroreductase, which show the genomic potential for anaerobic metabolism. A large cluster of genes encoding ankyrin repeat proteins (ANK) of eukaryotic‐like repeat domains and a large gene set for the flagellar system were also detected. Alginate‐binding periplasmic proteins and key genes responsible for alginate assimilation were found in the genome, which could potentially contribute to the breakdown of the host's alginate‐rich macroalgal diet. These results raise the possibility that this novel alphaproteobacterium is a widespread member of the abalone microbiome that may use polysaccharides derived from its host's macroalgal diet.
