Glycine/sarcosine/dimethylglycine N-methyltransferase

Glycine/sarcosine/dimethylglycine N-methyltransferase (EC 2.1.1.162, GSDMT, glycine sarcosine dimethylglycine N-methyltransferase) is an enzyme with systematic name S-adenosyl-L-methionine:glycine(or sarcosine or N,N-dimethylglycine) N-methyltransferase (sarcosine(or N,N-dimethylglycine or betaine)-forming).[1] This enzyme catalyses the following chemical reaction

3 S-adenosyl-L-methionine + glycine 3 S-adenosyl-L-homocysteine + betaine (overall reaction)
(1a) S-adenosyl-L-methionine + glycine S-adenosyl-L-homocysteine + sarcosine
(1b) S-adenosyl-L-methionine + sarcosine S-adenosyl-L-homocysteine + N,N-dimethylglycine
(1c) S-adenosyl-L-methionine + N,N-dimethylglycine S-adenosyl-L-homocysteine + betaine
Glycine/sarcosine/dimethylglycine N-methyltransferase
Identifiers
EC no.2.1.1.162
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Search
PMCarticles
PubMedarticles
NCBIproteins

This enzyme from the halophilic methanoarchaeon Methanohalophilus portucalensis can methylate glycine and all of its intermediates to form the compatible solute trimethylglycine.

References

  1. Lai MC, Wang CC, Chuang MJ, Wu YC, Lee YC (December 2006). "Effects of substrate and potassium on the betaine-synthesizing enzyme glycine sarcosine dimethylglycine N-methyltransferase from a halophilic methanoarchaeon Methanohalophilus portucalensis". Research in Microbiology. 157 (10): 948–55. doi:10.1016/j.resmic.2006.08.007. PMID 17098399.
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