IUBMB Enzyme Nomenclature


Accepted name: bacteriochlorophyll a synthase

Reaction: geranylgeranyl diphosphate + bacteriochlorophyllide a = geranylgeranyl-bacteriochlorophyllide a + diphosphate

For diagram of reaction click here.

Other name(s): bchG (gene name)

Systematic name: geranylgeranyl-diphosphate:bacteriochlorophyllide-a geranylgeranytransferase

Comments: The enzyme catalyses the addition of a geranylgeranyl hydrophobic chain to bacteriochlorophyllide a via an ester bond with the 17-propionate residue. The side chain is later modified to a phytyl chain, resulting in bacteriochlorophyll a.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Oster, U., Bauer, C.E. and Rüdiger, W. Characterization of chlorophyll a and bacteriochlorophyll a synthases by heterologous expression in Escherichia coli. J. Biol. Chem. 272 (1997) 9671-9676. [PMID: 9092496]

2. Addlesee, H.A., Fiedor, L. and Hunter, C.N. Physical mapping of bchG, orf427, and orf177 in the photosynthesis gene cluster of Rhodobacter sphaeroides: functional assignment of the bacteriochlorophyll synthetase gene. J. Bacteriol. 182 (2000) 3175-3182. [PMID: 10809697]

3. Garcia-Gil, L.J., Gich, F.B. and Fuentes-Garcia, X. A comparative study of bchG from green photosynthetic bacteria. Arch. Microbiol. 179 (2003) 108-115. [PMID: 12560989]

4. Saga, Y., Hirota, K., Harada, J. and Tamiaki, H. In vitro enzymatic activities of bacteriochlorophyll a synthase derived from the green sulfur photosynthetic bacterium Chlorobaculum tepidum. Biochemistry 54 (2015) 4998-5005. [PMID: 26258685]

[EC created 2016]

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