title: Variation of levels of mRNA coding for antenna and reaction center polypeptides in Rhodopseudomonas capsulata in response to changes in oxygen concentration.
abstract: The effect of oxygen tension on the transcription of genes coding for the photosynthetic apparatus of Rhodopseudomonas capsulata was determined by the Southern hybridization technique. Restriction endonuclease digests of the R-prime plasmid pRPS404 and a subcloned fragment thereof served as DNA probes for genetically defined regions. The results showed that transcripts corresponding to the genes for certain pigment-binding polypeptides increase in amount by about 40-fold after a drop in oxygen tension. Transcripts hybridizing to genes involved in bacteriochlorophyll biosynthesis increase to a much lesser extent, and several genes involved in carotenoid biosynthesis are not affected by pO2.
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics*; D001429:Bacteriochlorophylls / Q000096:biosynthesis / Q000235:genetics; D002338:Carotenoids / Q000235:genetics / Q000378:metabolism; D004262:DNA Restriction Enzymes; D005798:Genes, Bacterial; D045342:Light-Harvesting Protein Complexes; D009693:Nucleic Acid Hybridization; D010100:Oxygen / Q000502:physiology*; D045322:Photosynthetic Reaction Center Complex Proteins; D012329:RNA, Bacterial / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*; D012241:Rhodopseudomonas / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D001429:Bacteriochlorophylls; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D012329:RNA, Bacterial; D012333:RNA, Messenger; D002338:Carotenoids; D004262:DNA Restriction Enzymes; D010100:Oxygen