EC Number   |
Natural Substrates |
|---|
    1.3.1.33 | protochlorophyllide + NADPH |
light-dependent reaction. Isoform PORB and PORC are interchangeable and functionally redundant in developed plants. PORB as well as PORA, functions in assembly of prolamellar bodies and in photoactive protochlorophylluide formation in etiolated seedlings. At the onset of greening, prolamellar bodies are important for efficient capture of light energy for photoconversion under various light conditions, and PORC, which is induced by light irradiation, contributes to photoprotection during greening of the etiolated seedlings |
| 1.3.1.33 | more |
naturally occurring esterified protochlorophyllide and chemically prepared protochlorophyllide methyl ester are not substrates for the enzyme, removal of Mg2+ from the protochlorophyllide leads to inactivity of the compound as a substrate |
| 1.3.1.33 | chlorophyllide a + NADP+ |
POR catalyzes the NADPH-dependent reduction of the C17-C18 double bond of protochlorophyllide to form chlorophyllide |
| 1.3.1.33 | protochlorophyllide + NADPH |
PORB and PORC seem to play redundant roles in maintaining light-dependent chlorophyll biosynthesis in green plants and are together essential for growth and development |
| 1.3.1.33 | protochlorophyllide + NADPH + H+ |
the enzyme (LPOR) catalyzes a photocatalytic reaction |
| 1.3.1.33 | protochlorophyllide + NADPH |
the enzyme might be directly involved in the regulation of the metabolism of other porphyrins |
| 1.3.1.33 | protochlorophyllide + NADPH |
the expression of both isoforms, POR1 and POR2, is not negatively regulated by light and persists in matured green tissues. The expression of both genes appears to be regulated by a diurnal regulation |
| 1.3.1.33 | more |
the inhibition of por gene expression by continous far red light is mediated by phytochrome A |
