bacteriochlorophyllide d C-82-methyltransferase EC#: 2.1.1.332; ChemWhat Code: 1376618
Product Name
bacteriochlorophyllide d C-82-methyltransferase
Example Structure
Synonyms
bacteriochlorophyllide c C-82-methyltransferase, bchQ
EC Number
2.1.1.332
CAS Registry Number
Comments
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.
Cofactor
iron-sulfur
History
Reactions
(1) S-adenosyl-L-methionine + 8,12-diethyl-3-vinylbacteriochlorophyllide d = S-adenosyl-L-homocysteine + 12-ethyl-8-propyl-3- vinylbacteriochlorophyllide d. (2) S-adenosyl-L-methionine + 12-ethyl-8-propyl-3- vinylbacteriochlorophyllide d = S-adenosyl-L-homocysteine + 12-ethyl-8- isobutyl-3-vinylbacteriochlorophyllide d.
