Abstract
Formation of photosynthesis complexes in Rhodobacter sphaeroides is regulated in a redox- and light-dependent manner by the AppA/PpsR and PrrB/PrrA systems. While on the one hand, blue light is sensed by the flavin adenine dinucleotide-binding BLUF domain of AppA, on the other, light is absorbed by bacteriochlorophyll signals through PrrB/PrrA. We show that much smaller quantities initiate the AppA-mediated response to blue light than the bacteriochlorophyll-mediated response.
MeSH terms
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Bacterial Proteins / genetics
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Bacterial Proteins / metabolism*
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Blotting, Northern
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism*
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Flavoproteins / genetics
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Flavoproteins / metabolism*
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Gene Expression Regulation, Bacterial / radiation effects*
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Light Signal Transduction / physiology*
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Repressor Proteins / genetics
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Repressor Proteins / metabolism*
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Reverse Transcriptase Polymerase Chain Reaction
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Rhodobacter sphaeroides / genetics
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Rhodobacter sphaeroides / metabolism*
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Rhodobacter sphaeroides / radiation effects
Substances
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AppA protein, Rhodobacter sphaeroides
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Bacterial Proteins
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DNA-Binding Proteins
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Flavoproteins
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Repressor Proteins