Biology:Pheophorbidase

From HandWiki

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

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

References

  1. "Two enzymatic reaction pathways in the formation of pyropheophorbide a". Photosynthesis Research 74 (2): 225–33. 2002. doi:10.1023/A:1020919929608. PMID 16228561. 
  2. "Characterization and cloning of the chlorophyll-degrading enzyme pheophorbidase from cotyledons of radish". Plant Physiology 140 (2): 716–25. February 2006. doi:10.1104/pp.105.071290. PMID 16384908. 
  3. "Chlorophyll degradation during senescence". Annual Review of Plant Biology 57: 55–77. 2006. doi:10.1146/annurev.arplant.57.032905.105212. PMID 16669755. 

External links