title: Synthesis, membrane insertion and assembly of the chloroplast-encoded D1 protein into photosystem II.
abstract: Rapid light-dependent turnover of the chloroplast-encoded D1 protein maintains photosystem II (PS II) functional over a wide range of light intensities. Following initiation of psbA mRNA translation, the elongating D1 is targeted, possibly by chloroplast signal recognition particle 54 (cpSRP54), to the thylakoid cpSecY translocation channel. Transmembrane domains of nascent D1 start interacting with other PS II core proteins already during the translocation process to ensure an efficient assembly of the multiprotein membrane complex. Here we review the progress recently made concerning the synthesis, targeting, membrane insertion and assembly to PS II of the chloroplast-encoded D1 protein and discuss the possible convergence of targeting and translocation of chloroplast- and nuclear-encoded thylakoid proteins.
authors.affiliation: Department of Biology, University of Turku, FIN-20014, Turku, Finland.
authors.forename: Lixin
authors.initials: L
authors.lastname: Zhang
authors.forename: Eva Mari
authors.initials: EM
authors.lastname: Aro
mesh_terms: D002736:Chloroplasts / Q000235:genetics / Q000378:metabolism*; D007425:Intracellular Membranes / Q000378:metabolism*; D008954:Models, Biological; D010441:Peptide Chain Elongation, Translational; D045322:Photosynthetic Reaction Center Complex Proteins / Q000096:biosynthesis* / Q000235:genetics; D045332:Photosystem II Protein Complex; D021381:Protein Transport; D020524:Thylakoids / Q000378:metabolism
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex