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Synthesis, membrane insertion and assembly of the chloroplast‐encoded D1 protein into photosystem II
Author(s) -
Zhang Lixin,
Aro Eva-Mari
Publication year - 2002
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(02)02218-4
Subject(s) - thylakoid , twin arginine translocation pathway , chloroplast , signal recognition particle , photosystem ii , translocon , biology , protein targeting , microbiology and biotechnology , chloroplast stroma , multiprotein complex , biophysics , membrane protein , biochemistry , signal peptide , membrane , photosynthesis , gene , peptide sequence
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 psb A 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.