IUBMB Enzyme Nomenclature


Accepted name: bacteriochlorophyllide d C-20 methyltransferase

Reaction: S-adenosyl-L-methionine + a bacteriochlorophyllide d = S-adenosyl-L-homocysteine + a bacteriochlorophyllide c

For diagram of reaction click here.

Other name(s): bchU (gene name)

Systematic name: S-adenosyl-L-methionine:bacteriochlorophyllide-d C-20 methyltransferase

Comments: The enzyme, found in green sulfur bacteria (Chlorobiaceae) and green flimentous bacteria (Chloroflexaceae), catalyses the methylation of the C-20 methine bridge position in bacteriochlorophyllide d, forming bacteriochlorophyllide c.

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


1. Maresca, J.A., Gomez Maqueo Chew, A., Ponsati, M.R., Frigaard, N.U., Ormerod, J.G. and Bryant, D.A. The bchU gene of Chlorobium tepidum encodes the c-20 methyltransferase in bacteriochlorophyll c biosynthesis. J. Bacteriol. 186 (2004) 2558-2566. [PMID: 15090495]

[EC created 2016]

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