The Transcriptional Repressor PerR Senses Sulfane Sulfur by Cysteine Persulfidation at the Structural Zn²⁺ Site in Synechococcus sp. PCC7002.

ABSTRACT: Cyanobacteria can perform both anoxygenic and oxygenic photosynthesis, a characteristic which ensured that these organisms were crucial in the evolution of the early Earth and the biosphere. Reactive oxygen species (ROS) produced in oxygenic photosynthesis and reactive sulfur species (RSS) produced in anoxygenic photosynthesis are closely related to intracellular redox equilibrium. ROS comprise superoxide anion (O₂^●-), hydrogen peroxide (H₂O₂), and hydroxyl radicals (^●OH). RSS comprise H₂S and sulfane sulfur (persulfide, polysulfide, and S₈). Although the sensing mechanism for ROS in cyanobacteria has been explored, that of RSS has not been elucidated. Here, we studied the function of the transcriptional repressor

SUBMITTER: Liu D 

PROVIDER: S-EPMC9952342 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature