RRC ID 55424
Author Kumagai Y, Yoshizawa S, Nakajima Y, Watanabe M, Fukunaga T, Ogura Y, Hayashi T, Oshima K, Hattori M, Ikeuchi M, Kogure K, DeLong EF, Iwasaki W.
Title Solar-panel and parasol strategies shape the proteorhodopsin distribution pattern in marine Flavobacteriia.
Journal ISME J
Abstract Proteorhodopsin (PR) is a light-driven proton pump that is found in diverse bacteria and archaea species, and is widespread in marine microbial ecosystems. To date, many studies have suggested the advantage of PR for microorganisms in sunlit environments. The ecophysiological significance of PR is still not fully understood however, including the drivers of PR gene gain, retention, and loss in different marine microbial species. To explore this question we sequenced 21 marine Flavobacteriia genomes of polyphyletic origin, which encompassed both PR-possessing as well as PR-lacking strains. Here, we show that the possession or alternatively the lack of PR genes reflects one of two fundamental adaptive strategies in marine bacteria. Specifically, while PR-possessing bacteria utilize light energy ("solar-panel strategy"), PR-lacking bacteria exclusively possess UV-screening pigment synthesis genes to avoid UV damage and would adapt to microaerobic environment ("parasol strategy"), which also helps explain why PR-possessing bacteria have smaller genomes than those of PR-lacking bacteria. Collectively, our results highlight the different strategies of dealing with light, DNA repair, and oxygen availability that relate to the presence or absence of PR phototrophy.
Volume 12(5)
Pages 1329-1343
Published 2018-5-1
DOI 10.1038/s41396-018-0058-4
PII 10.1038/s41396-018-0058-4
PMID 29410487
PMC PMC5932025
MeSH Flavobacteriaceae / genetics* Genome, Bacterial Phototrophic Processes Rhodopsins, Microbial / genetics* Seawater / microbiology Sunlight
IF 9.493
Times Cited 4
General Microbes JCM 17109 JCM 13191 JCM 12886