The photosystem II subunit CP29 can be phosphorylated in both C3 and C4 plants as suggested by sequence analysis.

摘要: The CP29 subunit of Photosystem II is reversibly phosphorylated in Zea mays upon exposure to high light the cold (Bergantino et al., J Biol Chem 270 (1995) 8474–8481). This phenomenon was previously proposed be restricted C4 plants. We present complete sequence protein, deduced from a maize Lhcb4 cDNA clone, and its comparison with known sequences two C3 plants: Hordeum vulgare Arabidopsis thaliana. Despite relatively low degree homology their amino-terminal region, i.e. part molecule which maize, three polypeptides conserve consensus for site phosphorylation. proved by immunoblotting 33P-labelling that same post-translational modification occurs barley. Being thus common plant species, phosphorylation this minor antenna complex appears now as widespread phenomenon, possibly cascade signals redox status plastoquinone nuclear transcription apparatus. plants do not show conditions, but other low-molecular-weight phosphoproteins, whose role need elucidated, become evident.