1986
DOI: 10.1016/0014-5793(86)81143-7
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Formation of formaldehyde from S‐adenosyl‐L[methyl3H]methionme during enzymic transmethylation of histamine

Abstract: The experiments described here show that radiolabclIed formaldemethonc is formed from the radiolabelled methyl group of S-adenosyl-L-methionine in the course of the enzymic conversion of histamine to W-methylhistamine in the presence of dimedone suggesting that the formation of HCHO is probably linked to the enzymic trdnsmethylation of histamine. Histamine S-~denosyi-L-methioni~ Formaide~yde Enzymie transmethyiation Hotline-N-methy~transferase TLC

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Cited by 69 publications
(40 citation statements)
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“…In fact, formaldehyde exists within the body at low concentrations. This endogenous formaldehyde is a consistent metabolic product of methylation and demethylation, and can be detected in various tissues and body fluids [19] . Its generation and elimination are closely associated with the methionine-homocysteine cycle [20] .…”
Section: Discussionmentioning
confidence: 99%
“…In fact, formaldehyde exists within the body at low concentrations. This endogenous formaldehyde is a consistent metabolic product of methylation and demethylation, and can be detected in various tissues and body fluids [19] . Its generation and elimination are closely associated with the methionine-homocysteine cycle [20] .…”
Section: Discussionmentioning
confidence: 99%
“…Ma már bizonyított, hogy a szervezetben zajló metilezési reakciók leggyakrabban S-adenozil-metionin (SAM) kofaktor segítségével, formaldehid (HCHO) átmeneti termék képzésén keresztül történnek [5].…”
Section: áBraunclassified
“…Az átmeneti termékként keletkező HCHO 5,5-dimetilciklohexán-1,3-dionnal (dimedon) mint adduktképző vegyülettel formaldemetonként megköthető és analitikai módszerekkel mennyiségileg mérhető (1. ábra) [5,13,14].…”
Section: áBraunclassified
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“…[6,7] It has to pointed out that methylated/hydroxymethylated trace elements are potential formaldehyde (HCHO) precursors (generators) and HCHO formed from them can participate in different endogenous reactions/interactions. [8,9] Enzymatic transmethylation takes place through HCHO [10] and demethylation practically always involves formation of HCHO. [11] There is a primary HCHO cycle in biological systems ( Figure 3A) [12,13] in which the formation of the S-methyl group of L-methionine takes place through HCHO originating from natural HCHO generators and the formation of HCHO from SAM is linked to trans-methylation.…”
Section: Introductionmentioning
confidence: 99%