Protein
Serine/threonine-protein kinase STN8, chloroplastic
Organism
Arabidopsis thaliana
Function
Light-dependent serine/threonine protein kinase that specifically phosphorylates N-terminal threonine residues in psbA/D1, psbD/D2, psbC/CP43 and psbH, which are components of the core antenna complex of photosystem II. Phosphorylation of PSII core components facilitates the exchange of chlorophyll proteins between the grana and the stroma lamellae. Also involved in the phosphorylation of the calcium-sensing receptor (CaS).
Similarity
Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.
Sequence
MASLLSPATPTATSAAFHSCSTAGFSTPTHISSQNSSLSLLSRRGCMMRCSFSPQDIPVDSLSHLPPFLDFQNSLATFSDTQKWGFFVSAGIVWFYLTARPGVLIGAIDAYLLAPLQLGLDTLIGRRLKRSDFLVTEKLGEGSFGVVYAGVLLPKNSTLVDDVRVSKARAKAMDFTGEFKQRVILKKVKVGVRGAEEFGEYEEWFNYRLSRAAPDTCAEFLGSFVADKTNTMFTKGGKWLVWRFEGDRDLADYMKDRSFPSNLESIMFGRVLQGVESVKRRALIIKQIMRQIITSLRKIHGTGIVHRDVKPANLVVTKKGQIKLIDFGAAADLRIGKNYIPERTLLDPDYCPPELYVLPEETPSPPPEPIAALLSPILWQLNSPDLFDMYSAGIVLLQMAVPTLRSTAGLKNFNLEIKSVEYDLNRWRERTRTRPDLSILDLDSGRGWDLVTKLISERGSLRRGRLSAAAALRHPYFLLGGDQAAAVLSKLSFSK