Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093-0202, USA.
Biol Direct. 2011 Oct 10;6:52. doi: 10.1186/1745-6150-6-52.
Based on unique, coherent properties of phylogenetic analysis, key amino acid substitutions and structural modeling, we have identified a new class of unusual microbial rhodopsins related to the Anabaena sensory rhodopsin (ASR) protein, including multiple homologs not previously recognized. We propose the name xenorhodopsin for this class, reflecting a taxonomically diverse membership spanning five different Bacterial phyla as well as the Euryarchaeotal class Nanohaloarchaea. The patchy phylogenetic distribution of xenorhodopsin homologs is consistent with historical dissemination through horizontal gene transfer. Shared characteristics of xenorhodopsin-containing microbes include the absence of flagellar motility and isolation from high light habitats.
基于独特、连贯的系统发育分析特性、关键氨基酸取代和结构建模，我们鉴定了一类与鱼腥藻感光视紫红质蛋白（ASR）相关的新型微生物视紫红质，其中包括以前未被识别的多个同源物。我们提出 xenorhodopsin 这个名称来命名这一类，反映了跨越五个不同细菌门以及广古菌门的纳米古菌纲的分类多样性成员。xenorhodopsin 同源物的斑驳系统发育分布与通过水平基因转移的历史传播一致。含 xenorhodopsin 的微生物的共同特征包括缺乏鞭毛运动和与高光环境分离。
