Seiler N, Al-Therib M J
Biochem J. 1974 Oct;144(1):29-35. doi: 10.1042/bj1440029.
In contrast with putrescine (1,4-diaminobutane), which is a substrate of diamine oxidase, monoacetylputrescine is oxidatively deaminated both in vitro and in vivo by monoamine oxidase. The product of this reaction is N-acetyl-gamma-aminobutyrate. The existence of a degradative pathway in mammalian brain for putrescine is shown, which comprises acetylation of putrescine, oxidative deamination of monoacetylputrescine to N-acetyl-gamma-aminobutyrate, transformation of N-acetyl-gamma-aminobutyrate to gamma-aminobutyrate and degradation of gamma-aminobutyrate to CO(2) via the tricarboxylic acid cycle.
与作为二胺氧化酶底物的腐胺(1,4 - 二氨基丁烷)不同,单乙酰腐胺在体外和体内均可被单胺氧化酶氧化脱氨。该反应的产物是N - 乙酰 - γ - 氨基丁酸。结果表明,哺乳动物大脑中存在一条腐胺降解途径,该途径包括腐胺的乙酰化、单乙酰腐胺氧化脱氨生成N - 乙酰 - γ - 氨基丁酸、N - 乙酰 - γ - 氨基丁酸转化为γ - 氨基丁酸以及γ - 氨基丁酸通过三羧酸循环降解为CO₂ 。