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- W1522458047 abstract "The purple nonsulfur photosynthetic bacterium Rhodobacter capsulatus regulates synthesis of its photosystem in response to two environmental stimuli, oxygen tension and light intensity. Here we describe the identification and characterization of the trans-acting regulatory gene hvrA, which we show is involved in differentially controlling reaction center and light-harvesting gene expression in response to alterations in light intensity. An hvrA mutant strain is shown to lack the capability to trans-activate light-harvesting-I and reaction center gene expression but retain normal light-harvesting-II and photopigment regulation, in response to a reduction in light intensity. As a consequence of altered expression, hvrA mutant strains exhibit reduced photosynthetic growth capabilities under dim-light conditions. The results of this study and additional studies indicate that regulated synthesis of the photosystem involves complex sets of overlapping regulatory circuits that differentially control photosystem gene expression in response to environmental stimuli such as oxygen tension and light intensity." @default.
- W1522458047 created "2016-06-24" @default.
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- W1522458047 date "1994-11-01" @default.
- W1522458047 modified "2023-09-29" @default.
- W1522458047 title "Characterization of a light-responding trans-activator responsible for differentially controlling reaction center and light-harvesting-I gene expression in Rhodobacter capsulatus" @default.
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- W1522458047 doi "https://doi.org/10.1128/jb.176.22.6936-6943.1994" @default.
- W1522458047 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/197064" @default.
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