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ENZYME entry: EC 3.1.1.82

Accepted Name
pheophorbidase
Alternative Name(s)
phedase
PPD
Reaction catalysed
H(+) + H2O + pheophorbide a <=> CO2 + methanol + pyropheophorbide a
Comment(s)
  • Forms part of the chlorophyll degradation pathway, and is found in higher plants and in algae.
  • In higher plants it participates in de-greening processes such as fruit ripening, leaf senescence, and flowering.
  • Exists in two forms: type 1 is induced by senescence whereas type 2 is constitutively expressed.
  • Highly specific for pheophorbide as substrate (with a preference for pheophorbide a over pheophorbide b) as other chlorophyll derivatives such as protochlorophyllide a, pheophytin a and c, chlorophyll a and b, and chlorophyllide a cannot act as substrates.
  • Another enzyme, called pheophorbide demethoxycarbonylase (PDC), produces pyropheophorbide a from pheophorbide a without forming an intermediate although the precise reaction is not yet known.
Cross-references
BRENDA3.1.1.82
EC2PDB3.1.1.82
ExplorEnz3.1.1.82
PRIAM enzyme-specific profiles3.1.1.82
KEGG Ligand Database for Enzyme Nomenclature3.1.1.82
IUBMB Enzyme Nomenclature3.1.1.82
IntEnz3.1.1.82
MEDLINEFind literature relating to 3.1.1.82
MetaCyc3.1.1.82
Rhea expert-curated reactions3.1.1.82
UniProtKB/Swiss-Prot
Q2V0W1, PPD_RAPSA

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