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Light stimulates growth of proteorhodopsin-containing marine Flavobacteria

Gomez-Consarnau, Laura; Gonzalez, Jose M.; Coll-Llado, Montserrat; Gourdon, Pontus; Pascher, Torbjörn LU ; Neutze, Richard; Pedros-Alio, Carlos and Pinhassi, Jarone (2007) In Nature 445(7124). p.210-213
Abstract
Proteorhodopsins are bacterial light-dependent proton pumps. Their discovery within genomic material from uncultivated marine bacterioplankton caused considerable excitement because it indicated a potential phototrophic function within these organisms, which had previously been considered strictly chemotrophic(1). Subsequent studies established that sequences encoding proteorhodopsin are broadly distributed throughout the world's oceans(2-5). Nevertheless, the role of proteorhodopsins in native marine bacteria is still unknown(6). Here we show, from an analysis of the complete genomes of three marine Flavobacteria, that cultivated bacteria in the phylum Bacteroidetes, one of the principal components of marine bacterioplankton, contain... (More)
Proteorhodopsins are bacterial light-dependent proton pumps. Their discovery within genomic material from uncultivated marine bacterioplankton caused considerable excitement because it indicated a potential phototrophic function within these organisms, which had previously been considered strictly chemotrophic(1). Subsequent studies established that sequences encoding proteorhodopsin are broadly distributed throughout the world's oceans(2-5). Nevertheless, the role of proteorhodopsins in native marine bacteria is still unknown(6). Here we show, from an analysis of the complete genomes of three marine Flavobacteria, that cultivated bacteria in the phylum Bacteroidetes, one of the principal components of marine bacterioplankton, contain proteorhodopsin. Moreover, growth experiments in both natural and artificial seawater ( low in labile organic matter, which is typical of the world's oceans) establish that exposure to light results in a marked increase in the cell yield of one such bacterium (Dokdonia sp. strain MED134) when compared with cells grown in darkness. Thus, our results show that the phototrophy conferred by proteorhodopsin can provide critical amounts of energy, not only for respiration and maintenance but also for active growth of marine bacterioplankton in their natural environment. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature
volume
445
issue
7124
pages
210 - 213
publisher
Nature Publishing Group
external identifiers
  • wos:000243384300052
  • scopus:33846238031
ISSN
0028-0836
DOI
10.1038/nature05381
language
English
LU publication?
yes
id
eac1ed84-2dce-4f07-a91b-7cc637f605ed (old id 681464)
date added to LUP
2007-12-11 10:49:37
date last changed
2017-11-12 03:27:26
@article{eac1ed84-2dce-4f07-a91b-7cc637f605ed,
  abstract     = {Proteorhodopsins are bacterial light-dependent proton pumps. Their discovery within genomic material from uncultivated marine bacterioplankton caused considerable excitement because it indicated a potential phototrophic function within these organisms, which had previously been considered strictly chemotrophic(1). Subsequent studies established that sequences encoding proteorhodopsin are broadly distributed throughout the world's oceans(2-5). Nevertheless, the role of proteorhodopsins in native marine bacteria is still unknown(6). Here we show, from an analysis of the complete genomes of three marine Flavobacteria, that cultivated bacteria in the phylum Bacteroidetes, one of the principal components of marine bacterioplankton, contain proteorhodopsin. Moreover, growth experiments in both natural and artificial seawater ( low in labile organic matter, which is typical of the world's oceans) establish that exposure to light results in a marked increase in the cell yield of one such bacterium (Dokdonia sp. strain MED134) when compared with cells grown in darkness. Thus, our results show that the phototrophy conferred by proteorhodopsin can provide critical amounts of energy, not only for respiration and maintenance but also for active growth of marine bacterioplankton in their natural environment.},
  author       = {Gomez-Consarnau, Laura and Gonzalez, Jose M. and Coll-Llado, Montserrat and Gourdon, Pontus and Pascher, Torbjörn and Neutze, Richard and Pedros-Alio, Carlos and Pinhassi, Jarone},
  issn         = {0028-0836},
  language     = {eng},
  number       = {7124},
  pages        = {210--213},
  publisher    = {Nature Publishing Group},
  series       = {Nature},
  title        = {Light stimulates growth of proteorhodopsin-containing marine Flavobacteria},
  url          = {http://dx.doi.org/10.1038/nature05381},
  volume       = {445},
  year         = {2007},
}