EC - 3,8-divinyl protochlorophyllide a 8-vinyl-reductase (ferredoxin)

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IntEnz Enzyme Nomenclature


Accepted name:
3,8-divinyl protochlorophyllide a 8-vinyl-reductase (ferredoxin)
Other names:
bciB (gene name)
cyano-type divinyl chlorophyllide a 8-vinyl-reductase
Systematic name:
protochlorophyllide-a:ferredoxin C-81-oxidoreductase



The enzyme, found in many phototrophic bacteria, land plants, and some green and red algae, is involved in the production of monovinyl versions of (bacterio)chlorophyll pigments from their divinyl precursors. Binds two [4Fe-4S] clusters and an FAD cofactor. It can also act on 3,8-divinyl chlorophyllide a, 3,8-divinyl chlorophyll a, and chlorophyll c2. cf. EC, 3,8-divinyl protochlorophyllide a 8-vinyl-reductase (NADPH).

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB


  1. Chew, A. G., Bryant, D. A.
    Characterization of a plant-like protochlorophyllide a divinyl reductase in green sulfur bacteria.
    J. Biol. Chem. 282 : 2967-2975 (2007). [PMID: 17148453]
  2. Saunders, A. H., Golbeck, J. H., Bryant, D. A.
    Characterization of BciB: a ferredoxin-dependent 8-vinyl-protochlorophyllide reductase from the green sulfur bacterium Chloroherpeton thalassium.
    Biochemistry 52 : 8442-8451 (2013). [PMID: 24151992]
  3. Ito, H., Tanaka, A.
    Evolution of a new chlorophyll metabolic pathway driven by the dynamic changes in enzyme promiscuous activity.
    Plant Cell Physiol. 55 : 593-603 (2014). [PMID: 24399236]

[EC created 2016]