EC - Bacteriochlorophyllide d C-82-methyltransferase

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IntEnz Enzyme Nomenclature


Accepted name:
bacteriochlorophyllide d C-82-methyltransferase
Other name:
bchQ (gene name)
Systematic name:
S-adenosyl-L-methionine:8,12-diethyl-3-vinylbacteriochlorophyllide-d C-82-methyltransferase




This enzyme, found in green sulfur bacteria (Chlorobiaceae) and green flimentous bacteria (Chloroflexaceae), is a radical S-adenosyl-L-methionine (AdoMet) enzyme and contains a [4Fe-4S] cluster. It adds one or two methyl groups at the C-82 position of bacteriochlorophylls of the c, d and e types. These methylations play a role in fine-tuning the structural arrangement of the bacteriochlorophyll aggregates in chlorosomes and therefore directly influence chlorosomal absorption properties.

Links to other databases

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


  1. Gomez Maqueo Chew, A., Frigaard, N. U., Bryant, D. A.
    Bacteriochlorophyllide c C-8(2) and C-12(1) methyltransferases are essential for adaptation to low light in Chlorobaculum tepidum.
    J. Bacteriol. 189 : 6176-6184 (2007). [PMID: 17586634]

[EC created 2016]