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EC 1.3.1.80 Details
EC number
1.3.1.80
Accepted name
red chlorophyll catabolite reductase
Reaction
primary fluorescent chlorophyll catabolite + NADP+ = red chlorophyll catabolite + NADPH + H+
Other name(s)
RCCR, RCC reductase, red Chl catabolite reductase
Systematic name
primary fluorescent chlorophyll catabolite:NADP+ oxidoreductase
Comment
Chlorophyll degradation is a characteristic symptom of leaf senescence and fruit ripening. The reaction catalysed by this enzyme requires reduced ferredoxin, which is generated either by NADPH through the pentose-phosphate pathway or by the action of photosystem I [1,2]. This reaction takes place without release of the substrate from EC 1.14.12.20, pheophorbide a oxygenase [3]. Depending on the plant species used as the source of enzyme, one of two possible C-1 epimers of primary fluorescent chlorophyll catabolite (pFCC), pFCC-1 or pFCC-2, is normally formed, with all genera or species within a family producing the same isomer [3,4]. After modification and export, pFCCs are eventually imported into the vacuole, where the acidic environment causes their non-enzymic conversion into colourless breakdown products called non-fluorescent chlorophyll catabolites (NCCs) [2].
History
created 2007, deleted 2016
EC Tree
1.3.1.23 created 1972, deleted 2005
1.3.1.50 created 1992, deleted 1999
1.3.1.55 created 1999, deleted 2004