Homocysteine (/ˌhoʊmoʊˈsɪstiːn/) or Hcy: is a non-proteinogenic α-amino acid. It is a homologue of the amino acid cysteine, differing by an additional...

Homocysteine methylase may refer to: Homocysteine S-methyltransferase 5-methyltetrahydropteroyltriglutamate—homocysteine S-methyltransferase This set index...

Homocysteine thiolactone (HTL) is an intramolecular thioester of homocysteine synthesized by methionyl-tRNA synthetase in an error-editing reaction that...

regenerated by methylation or is salvaged by removing the adenine and the homocysteine, leaving the compound dihydroxypentandione to spontaneously convert into...

characterized by an abnormally high level of total homocysteine (that is, including homocystine and homocysteine-cysteine disulfide) in the blood, conventionally...

In the field of enzymology, a betaine-homocysteine S-methyltransferase also known as betaine-homocysteine methyltransferase (BHMT) is a zinc metallo-enzyme...

The enzyme homocysteine desulfhydrase (EC 4.4.1.2) catalyzes the chemical reaction L-homocysteine + H2O = hydrogen sulfide + NH3 + 2-oxobutanoate (overall...

S-Adenosyl-L-homocysteine (SAH) is the biosynthetic precursor to homocysteine. SAH is formed by the demethylation of S-adenosyl-L-methionine. Adenosylhomocysteinase...

Methyl-B12 converts homocysteine, in a reaction catalyzed by homocysteine methyltransferase, to methionine. A defect in homocysteine methyltransferase or...

of methionine from homocysteine in most individuals. In humans it is encoded by the MTR gene (5-methyltetrahydrofolate-homocysteine methyltransferase)...

cystine-homocysteine, homocysteine in homocysteine-homocysteine) via disulfide bonds. Since as an equilibrium process the proportion of free homocysteine is...

adenosylmethionine:homocysteine methyltransferase, homocysteine methylase, homocysteine methyltransferase, homocysteine transmethylase, L-homocysteine S-methyltransferase...

hydrolysis of S-adenosylhomocysteine to homocysteine and adenosine. S-adenosyl-L-homocysteine + H2O ⇌ L-homocysteine + adenosine AdoHcyase is a highly conserved...

IUPAC name 2-Amino-4-ethylsulfanylbutyric acid Other names S-Ethyl-L-homocysteine Identifiers CAS Number 13073-35-3 Y 3D model (JSmol) Interactive image...

has authorized the health claim that betaine "contributes to normal homocysteine metabolism." Trimethylglycine is an N-methylated amino acid. It is a...

In enzymology, a 5-methyltetrahydropteroyltriglutamate—homocysteine S-methyltransferase (EC 2.1.1.14) is an enzyme that catalyzes the chemical reaction...

remethylation of homocysteine in the methionine cycle, and result in raised homocysteine levels. There is much evidence linking elevated homocysteine concentrations...

10-methylenetetrahydrofolate to 5-methyltetrahydrofolate, a cosubstrate for homocysteine remethylation to methionine. Natural variation in this gene is common...

1) that use SAM as a substrate produce S-adenosyl homocysteine as a product. S-Adenosyl homocysteine is a strong negative regulator of nearly all SAM-dependent...

level for DNA reproduction, the cysteine cycle and the regulation of homocysteine. It is also the form found in circulation and transported across membranes...

first step of the transsulfuration pathway, from homocysteine to cystathionine: L-serine + L-homocysteine ⇌ {\displaystyle \rightleftharpoons } L-cystathionine...

thetin-homocysteine S-methyltransferase (EC 2.1.1.3) is an enzyme that catalyzes the chemical reaction dimethylsulfonioacetate + L-homocysteine ⇌ {\displaystyle...

2-Formylamino-4-methylsulfanyl-butyric acid; Formylmethionine; N-Formyl(methyl)homocysteine Identifiers CAS Number 4289-98-9 Y 3D model (JSmol) Interactive image...

chemical reaction S-adenosyl-L-homocysteine + H2O ⇌ {\displaystyle \rightleftharpoons } S-(5-deoxy-D-ribos-5-yl)-L-homocysteine + adenine Thus, the two substrates...

certain enzymes. Remethylation is a major step in the conversion of homocysteine to the essential amino acid methionine. The remethylation process involves...

is a metabolic pathway involving the interconversion of cysteine and homocysteine through the intermediate cystathionine. Two transsulfurylation pathways...

4.4.1.21) catalyzes the reaction S-(5-deoxy-D-ribos-5-yl)-L-homocysteine = L-homocysteine + (4S)-4,5-dihydroxypentan-2,3-dione This enzyme belongs to...

and hematopoietic cells. Increased homocysteine and methylmalonic acid in Vitamin B12 deficiency Increased homocysteine in folate deficiency Normal levels...

hydroxocobalamine at 1 mg daily to be ineffective in reducing levels of homocysteine. In a trial on adult volunteers, this dose did not lead to a significant...

blood levels of the amino acid homocysteine is associated with premature atherosclerosis; whether elevated homocysteine in the normal range is causal is...