Photosystem II assembly factor lipoprotein Psb27

UniProtKB accession:  Q8DG60

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UniProtKB description:  Plays a role in the repair and/or biogenesis of the calcium-manganese-oxide cluster on the lumenal face of the thylakoid membrane. Its presence in a photosystem II (PSII) preparation prevents binding of other extrinsic subunits PsbO, PsbU and PsbV, and thus assembly of calcium-manganese-oxide cluster. Psb27-containing complexes lack oxygen evolving activity and an oxidizable calcium-manganese-oxide cluster, but have a normal reaction center.