Dimethylglycine N-methyltransferase

Dimethylglycine N-methyltransferase
Identifiers
EC no.2.1.1.161
Databases
BRENDAenzyme data
ExPASyNiceZyme view
KEGGenzyme entry
MetaCycmetabolic pathway
Rheareactions
PDB structuresRCSB PDB PDBe PDBsum
Search
PMCarticles
PubMedarticles
NCBIproteins

Dimethylglycine N-methyltransferase (EC 2.1.1.161, BsmB, DMT) is an enzyme with systematic name S-adenosyl-L-methionine:N,N-dimethylglycine N-methyltransferase (betaine-forming).[1] This enzyme catalyses the following chemical reaction

+ SAM
 
 
 
 
Rightward reaction arrow
 
 
 
+ SAH
 

The enzyme adds a methyl group to N.N-dimethylglycine, giving the product betaine, trimethylglycine. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH). The enzyme was characterised from the cyanobacterium, Synechococcus sp. WH8102.[2] Unlike the related enzyme, sarcosine/dimethylglycine N-methyltransferase, sarcosine is not a substrate.[1]

References

  1. 1 2 Enzyme 2.1.1.161 at KEGG Pathway Database.
  2. ↑ Lu WD, Chi ZM, Su CD (December 2006). "Identification of glycine betaine as compatible solute in Synechococcus sp. WH8102 and characterization of its N-methyltransferase genes involved in betaine synthesis". Archives of Microbiology. 186 (6): 495–506. Bibcode:2006ArMic.186..495L. doi:10.1007/s00203-006-0167-8. PMID 17019606. S2CID 25210214.