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In the field of enzymology, a betaine-homocysteine S-methyltransferase also known as betaine-homocysteine methyltransferase (BHMT) is a zinc metallo-enzyme that catalyzes the transfer of a methyl group from trimethylglycine and a hydrogen ion from homocysteine to produce dimethylglycine and methionine respectively: [2]
In enzymology, a homocysteine S-methyltransferase (EC 2.1.1.10) is an enzyme that catalyzes the chemical reaction. S-methylmethionine + L-homocysteine 2 L-methionine. Thus, the two substrates of this enzyme are S-methylmethionine and L-homocysteine, and it produces 2 molecules of L-methionine.
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
The S-methyl-L-cysteine residue irreversibly inactivates the protein, allowing only one transfer for each protein. This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is DNA-6-O-methylguanine:[protein]-L-cysteine S-methyltransferase.
Fort Walton Beach, often referred to by the initialism FWB, is a city in southern Okaloosa County, Florida, United States. As of the 2020 U.S. census, the population was 20,922, [7] up from 19,507 in 2010. [8] It is a principal city of the Crestview−Fort Walton Beach−Destin, Florida Metropolitan Statistical Area.
The enzyme from Escherichia coli consists of two alpha8-beta8 (TIM) barrels positioned face to face and thought to have evolved by gene duplication. [1] The active site lies between the tops of the two barrels, the N-terminal barrel binds 5-methyltetrahydropteroyltri-L-glutamic acid and the C-terminal barrel binds homocysteine.
In enzymology, a thioether S-methyltransferase (EC 2.1.1.96) is an enzyme that catalyzes the chemical reaction. S-adenosyl-L-methionine + dimethyl sulfide ⇌ {\displaystyle \rightleftharpoons } S-adenosyl-L-homocysteine + trimethylsulfonium
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