2013
DOI: 10.1073/pnas.1322410111
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Apo-bacteriophytochromes modulate bacterial photosynthesis in response to low light

Abstract: Significance Bacteriophytochromes (BphPs) are regulatory proteins that bind a light-absorbing chromophore called biliverdin. Recombinant BphPs show promise for use in regulating neuron function in mammals with light. We explored the possibility that BphPs may sense cues in addition to light. Our motivation was that biliverdin requires oxygen for its synthesis, and some bacteria use BphPs to control photosynthesis in the absence of oxygen. We found that the photosynthetic bacterium … Show more

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Cited by 27 publications
(29 citation statements)
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“…The chromophores of phytochromes from photosynthetic heterokonts such as diatoms and the phaeophyte Ectocarpus are less straightforward to predict. It is possible that these proteins are able to sense other signals or to signal without chromophore (35). Heterokont algae lack phycobiliproteins, but their genomes retain ferredoxin-dependent bilin reductases (FDBRs) required to synthesize phytobilins from BV (24,36).…”
Section: Resultsmentioning
confidence: 99%
“…The chromophores of phytochromes from photosynthetic heterokonts such as diatoms and the phaeophyte Ectocarpus are less straightforward to predict. It is possible that these proteins are able to sense other signals or to signal without chromophore (35). Heterokont algae lack phycobiliproteins, but their genomes retain ferredoxin-dependent bilin reductases (FDBRs) required to synthesize phytobilins from BV (24,36).…”
Section: Resultsmentioning
confidence: 99%
“…R. palustris strain CGA009 was used as the wild-type for this study. Anaerobic cultures were grown under illumination at 30 °C, using a defined media PM with 20 mM sodium acetate or 10mM sodium succinate as the carbon source ( 45 ). The longevity of R. palustris cultures was determined by counting the colony-forming units as described previously ( 12 ).…”
Section: Methodsmentioning
confidence: 99%
“…R. palustris also grows aerobically as a heterotroph, and some strains grow anaerobically in the dark by nitrate respiration. It has served as a model organism for studies of anaerobic aromatic compound degradation, hydrogen gas production, nitrogen fixation, and photosynthesis (13)(14)(15)(16)(17)(18)(19)(20)(21). R. palustris grows by budding in which a motile daughter swarmer cell is pinched off from the pole of a sessile mother cell once chromosome replication is complete (22).…”
mentioning
confidence: 99%