Pheophorbidase

Pheophorbidase
Identifiers
EC no.3.1.1.82
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Pheophorbidase (EC 3.1.1.82, phedase, PPD) is an enzyme with systematic name pheophorbide-a hydrolase.[1][2][3] It catalyses the following reaction:

pheophorbide a + H2O ⇌ {\displaystyle \rightleftharpoons } pyropheophorbide a + methanol + CO2 (overall reaction)
(1a) pheophorbide a + H2O ⇌ {\displaystyle \rightleftharpoons } C-132-carboxypyropheophorbide a + methanol
(1b) C-132-carboxypyropheophorbide a ⇌ {\displaystyle \rightleftharpoons } pyropheophorbide a + CO2 (spontaneous)

This enzyme participates in the chlorophyll degradation in higher plants and algae.

References

  1. ^ Suzuki Y, Doi M, Shioi Y (2002). "Two enzymatic reaction pathways in the formation of pyropheophorbide a". Photosynthesis Research. 74 (2): 225–33. doi:10.1023/A:1020919929608. PMID 16228561.
  2. ^ Suzuki Y, Amano T, Shioi Y (February 2006). "Characterization and cloning of the chlorophyll-degrading enzyme pheophorbidase from cotyledons of radish". Plant Physiology. 140 (2): 716–25. doi:10.1104/pp.105.071290. PMC 1361337. PMID 16384908.
  3. ^ Hörtensteiner S (2006). "Chlorophyll degradation during senescence". Annual Review of Plant Biology. 57: 55–77. doi:10.1146/annurev.arplant.57.032905.105212. PMID 16669755.
  • Pheophorbidase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
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Hydrolase: esterases (EC 3.1)
3.1.1: Carboxylic
ester hydrolases3.1.2: Thioesterase3.1.3: Phosphatase3.1.4:
Phosphodiesterase3.1.6: SulfataseNuclease (includes
deoxyribonuclease
and ribonuclease)
3.1.11-16:
Exonuclease
Exodeoxyribonuclease
Exoribonuclease
3.1.21-31:
Endonuclease
Endodeoxyribonuclease
Endoribonuclease
either deoxy- or ribo-    
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