C-terminal processing peptidase
Definition:
EC Tree > 3 Hydrolases > 3.4 Acting on peptide bonds (peptidases) > 3.4.21 Serine endopeptidases > 3.4.21.102 C-terminal processing peptidase
C-terminal processing peptidase is a serine peptidase in family S41 whose proteolytic processing of the D1 protein of photosystem II is required for light-driven assembly of the tetranuclear manganese cluster responsible for photosynthetic water oxidation; substrate recognition is mediated by a PDZ domain that binds internal or C-terminal sequences of partner proteins; the enzyme specifically recognises a C-terminal tripeptide Xaa-Yaa-Zaa (Xaa preferably Ala or Leu, Yaa Ala or Tyr, Zaa Ala) but then cleaves at a variable distance from the C-terminus, typically Ala-Ala-Arg-Ala-Ala-Lys-Glu-Asn-Tyr-Ala-Leu-Ala-Ala, and in the plant chloroplast removes the C-terminal extension of the D1 polypeptide. By maturing D1 it enables photosynthetic oxygen evolution. It is distributed across Bacteria and Eukaryota.
C-terminal processing peptidase is a serine peptidase in family S41 whose proteolytic processing of the D1 protein of photosystem II is required for light-driven assembly of the tetranuclear manganese cluster responsible for photosynthetic water oxidation; substrate recognition is mediated by a PDZ domain that binds internal or C-terminal sequences of partner proteins; the enzyme specifically recognises a C-terminal tripeptide Xaa-Yaa-Zaa (Xaa preferably Ala or Leu, Yaa Ala or Tyr, Zaa Ala) but then cleaves at a variable distance from the C-terminus, typically Ala-Ala-Arg-Ala-Ala-Lys-Glu-Asn-Tyr-Ala-Leu-Ala-Ala, and in the plant chloroplast removes the C-terminal extension of the D1 polypeptide. By maturing D1 it enables photosynthetic oxygen evolution. It is distributed across Bacteria and Eukaryota.
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