2024-03-29T09:57:07Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1353252021-12-28T16:48:04Zcom_10261_88com_10261_8col_10261_341
DIGITAL.CSIC
author
Llorens-Marès, Tomàs
author
Liu, Zhenfeng
author
Allen, Lisa Zeigler
author
Rusch, Douglas B.
author
Craig, Matthew T.
author
Dupont, Chris L.
author
Bryant, Donald A.
author
Casamayor, Emilio O.
2016-08-04T10:42:47Z
2016-08-04T10:42:47Z
2016
The ISME Journal : doi: 10.1038/ismej.2016.93 (2016)
1751-7362
http://hdl.handle.net/10261/135325
10.1038/ismej.2016.93
1751-7370
27392085
A natural planktonic bloom of a brown-pigmented photosynthetic green sulfur bacteria (GSB) from the
disphotic zone of karstic Lake Banyoles (NE Spain) was studied as a natural enrichment culture from
which a nearly complete genome was obtained after metagenomic assembly. We showed in situ a case
where horizontal gene transfer (HGT) explained the ecological success of a natural population unveiling
ecosystem-specific adaptations. The uncultured brown-pigmented GSB was 99.7% identical in the 16S
rRNA gene sequence to its green-pigmented cultured counterpart Chlorobium luteolum DSM 273T.
Several differences were detected for ferrous iron acquisition potential, ATP synthesis and gas vesicle
formation, although the most striking trait was related to pigment biosynthesis strategy. Chl. luteolum
DSM 273T synthesizes bacteriochlorophyll (BChl) c, whereas Chl. luteolum CIII incorporated by HGT a
18-kbp cluster with the genes needed for BChl e and specific carotenoids biosynthesis that provided
ecophysiological advantages to successfully colonize the dimly lit waters. We also genomically
characterized what we believe to be the first described GSB phage, which based on the metagenomic
coverage was likely in an active state of lytic infection. Overall, we observed spread HGT and we
unveiled clear evidence for virus-mediated HGT in a natural population of photosynthetic GSB.
eng
closedAccess
Speciation and ecological success in dimly lit waters: horizontal gene transfer in a green sulfur bacteria bloom unveiled by metagenomic assembly
artículo
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URL
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File
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restringido.pdf