ID 3.4.21.102 DE C-terminal processing peptidase. AN photosystem II D1 protein processing peptidase. AN protease Re. AN tail-specific protease. AN Tsp protease. CA The enzyme shows specific recognition of a C-terminal tripeptide, Xaa- CA Yaa-Zaa, in which Xaa is preferably Ala or Leu, Yaa is preferably Ala or CA Tyr, and Zaa is preferably Ala, but then cleaves at a variable distance CA from the C-terminus. A typical cleavage is -Ala-Ala-|-Arg-Ala-Ala- CA Lys-Glu-Asn-Tyr-Ala-Leu-Ala-Ala. CC -!- In the plant chloroplast, the enzyme removes the C-terminal extension CC of the D1 polypeptide of photosystem II; this proteolytic processing CC is necessary to allow the light-driven assembly of the tetranuclear CC manganese cluster, which is responsible for photosynthetic water CC oxidation. CC -!- Belongs to peptidase family S41. DR F4KHG6, CTPA1_ARATH; O23614, CTPA2_ARATH; F4J3G5, CTPA3_ARATH; DR O34666, CTPA_BACSU ; Q44879, CTPA_BARBK ; P42784, CTPA_PICP2 ; DR Q55669, CTPA_SYNY3 ; O04073, CTPA_TETOB ; O35002, CTPB_BACSU ; DR P23865, PRC_ECOLI ; P45306, PRC_HAEIN ; P43669, PRC_SALTY ; //