Global abundance of microbial rhodopsins

被引：97

作者：

Finkel, Omri M. ^{[1
]}

Beja, Oded ^{[2
]}

Belkin, Shimshon ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Alexander Silberman Inst Life Sci, Dept Plant & Environm Sci, IL-91904 Jerusalem, Israel

[2] Technion Israel Inst Technol, Fac Biol, IL-32000 Haifa, Israel

来源：

ISME JOURNAL | 2013年 / 7卷 / 02期

关键词：

metagenomics; phototrophy; rhodopsin; PHOTOSYSTEM-I; PHOTOSYNTHESIS GENES; MARINE; PROTEORHODOPSIN; PHOTOTROPHY; PROCHLOROCOCCUS; SYNECHOCOCCUS; EXPEDITION;

D O I：

10.1038/ismej.2012.112

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Photochemical reaction centers and rhodopsins are the only phototrophic mechanisms known to have evolved on Earth. The minimal cost of bearing a rhodopsin-based phototrophic mechanism in comparison to maintaining a photochemical reaction center suggests that rhodopsin is the more abundant of the two. We tested this hypothesis by conducting a global abundance calculation of phototrophic mechanisms from 116 marine and terrestrial microbial metagenomes. On average, 48% of the cells from which these metagenomes were generated harbored a rhodopsin gene, exceeding the reaction center abundance by threefold. Evidence from metatranscriptomic data suggests that this genomic potential is realized to a substantial extent, at least for the small-sized (40.8 mu m) of microbial fractions. The ISME Journal (2013) 7, 448-451; doi:10.1038/ismej.2012.112; published online 11 October 2012

引用

页码：448 / 451

页数：4

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