Widespread distribution of proteorhodopsins in freshwater and brackish ecosystems

被引：87

作者：

Atamna-Ismaeel, Nof ^{[1
]}

Sabehi, Gazalah ^{[1
]}

Sharon, Itai ^{[1
,2
]}

Witzel, Karl-Paul ^{[3
]}

Labrenz, Matthias ^{[4
]}

Juergens, Klaus ^{[4
]}

Barkay, Tamar ^{[5
]}

Stomp, Maayke ^{[6
]}

Huisman, Jef ^{[6
]}

Beja, Oded ^{[1
]}

机构：

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

[2] Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, Israel

[3] Max Planck Inst Limnol, D-2320 Plon, Germany

[4] Leibniz Inst Balt Sea Res, Dept Biol Oceanog, Rostock, Germany

[5] Rutgers State Univ, Dept Biochem & Microbiol, New Brunswick, NJ 08903 USA

[6] Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Amsterdam, Netherlands

来源：

ISME JOURNAL | 2008年 / 2卷 / 06期

基金：

美国国家科学基金会; 以色列科学基金会;

关键词：

microbial biodiversity; phototrophic growth; phylogenetic tree; proteobacteria; rhodopsins; spectral tuning;

D O I：

10.1038/ismej.2008.27

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Proteorhodopsins (PRs) are light-driven proton pumps that have been found in a variety of marine environments. The goal of this study was to search for PR presence in different freshwater and brackish environments and to explore the diversity of non-marine PR protein. Here, we show that PRs exist in distinctly different aquatic environments, ranging from clear water lakes to peat lakes and in the Baltic Sea. Some of the PRs observed in this study formed unique clades that were not previously observed in marine environments, whereas others were similar to PRs found in non-marine samples of the Global Ocean Sampling (GOS) expedition. Furthermore, the similarity of several PRs isolated from lakes in different parts of the world suggests that these genes are dispersed globally and that they may encode unique functional capabilities enabling successful competition in a wide range of freshwater environments. Phylogenomic analysis of genes found on these GOS scaffolds suggests that some of the freshwater PRs are found in freshwater Flavobacteria and freshwater SAR11-like bacteria.

引用

页码：656 / 662

页数：7