Regulation of Gene Expression in Response to Oxygen Tension

摘要: Purple photosynthetic bacteria control numerous energy-generating and energy-utilizing processes in response to alterations cellular redox, which is affected by environmental oxygen tension. The list of redox-regulated events includes synthesis the pigmented cytochrome components photosystem, enzymes for fixation carbon nitrogen, several terminal respiratory electron transport complexes, hydrogenase complex. Regulating these involves well-characterized transcription factors including sensor kinase RegB its cognate regulator RegA. Other redox-responding regulators include CrtJ Fnr. Mechanisms redox sensing are discussed.