Light versus Dark gene expression in SAR11
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ABSTRACT: We investigated the transcriptional response of cand. Pelagibacter ubique cultures to light and dark when grown under carbon replete and deplete conditions. Results: During exponential phase, few genes were differentially transcribed between light:dark growth conditions. In stationary phase, a high proportion (9.7%) of coding sequences were found differentially expressed between treatments; 4.7% being up-regulated in the light (n=64) and 4.9% being up-regulated in the dark (n=67). Several components of the oxidative phosphorylation pathway were up-regulated in the dark, supporting physiological data showing higher respiration rates in darkness than in the light under starvation conditions. We also observed up-regulation of a proton translocating pyrophosphate synthase (SAR11_1040), which may be an additional energy production mechanism utilized by SAR11 cells in the dark. Finally, we noted the up-regulation of pili formation genes in the array data, consistent with the observation of pili in dark grown cells via electron microscopy.
ORGANISM(S): Candidatus Pelagibacter ubique HTCC1062 Candidatus Pelagibacter ubique HTCC1002 Candidatus Pelagibacter sp. HTCC7211
PROVIDER: GSE24134 | GEO | 2011/12/31
SECONDARY ACCESSION(S): PRJNA130131
REPOSITORIES: GEO
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