title: Light, redox state, thylakoid-protein phosphorylation and signaling gene expression.
abstract: Two recent publications concerning the chloroplast membrane-protein phosphorylation and state transition might lead to further progress in the elucidation of the mechanism and role of this process. A thylakoid-bound protein TSP9 is released to the chloroplast matrix upon redox-dependent stepwise phosphorylation of three threonine sites and might signal redox-dependent gene transcription. The state-transition process and phosphorylation of the light-harvesting complex II require the activity of a novel protein kinase Stt7.
mesh_terms: D002736:Chloroplasts / Q000201:enzymology; D018506:Gene Expression Regulation, Plant; D008027:Light; D008565:Membrane Proteins / Q000378:metabolism*; D010084:Oxidation-Reduction; D010766:Phosphorylation; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism*; D017346:Protein Serine-Threonine Kinases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction; D020524:Thylakoids / Q000737:chemistry* / Q000378:metabolism / Q000502:physiology*
chemical_list: D008565:Membrane Proteins; D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins; D017346:Protein Serine-Threonine Kinases