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Methionine (symbol Met or M) [3] (/ m ɪ ˈ θ aɪ ə n iː n /) [4] is an essential amino acid in humans.. As the precursor of other non-essential amino acids such as cysteine and taurine, versatile compounds such as SAM-e, and the important antioxidant glutathione, methionine plays a critical role in the metabolism and health of many species, including humans.
S-Methylmethionine (SMM) is a derivative of methionine with the chemical formula (CH 3) 2 S + CH 2 CH 2 CH(NH 3 +)CO 2 −. This cation is a naturally-occurring intermediate in many biosynthetic pathways owing to the sulfonium functional group. It is biosynthesized from L-methionine and S-adenosylmethionine by the enzyme methionine S ...
In enzymology, a methionine—tRNA ligase (EC 6.1.1.10) is an enzyme that catalyzes the chemical reaction. ATP + L-methionine + tRNAMet AMP + diphosphate + L-methionyl-tRNAMet. The 3 substrates of this enzyme are ATP, L-methionine, and tRNA(Met), whereas its 3 products are AMP, diphosphate, and L-methionyl-tRNA(Met).
Methionyl-glycine is a dipeptide consisting of the amino acids methionine and glycine. [3] It is often studied for its potential role in biochemical processes and protein synthesis. This compound may have implications in nutritional supplements and therapeutic treatments due to the essential nature of methionine. [citation needed]
Remethylation is a major step in the conversion of homocysteine to the essential amino acid methionine. The remethylation process involves the enzyme methionine synthase (MS), which requires vitamin B 12 as a cofactor, and also depends indirectly on folate [ 1 ] and other B vitamins .
L-theanine is a compound found in tea that has been touted for benefits in stress relief. Here's what to know about its benefits, risks, and supplementation.
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