Schlenk F, Dainko JL. The S-n-propyl analogue of S-adenosylmethionine.
BIOCHIMICA ET BIOPHYSICA ACTA 1975;
385:312-23. [PMID:
1092359 DOI:
10.1016/0304-4165(75)90359-1]
[Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A special strain of Saccharomyces cerevisiae responded to a supplement of S-n-propyl-L-homocysteine in the culture medium by synthesizing S-adenosyl-(S-n-propyl)L-homocysteine, the S-n-propyl analogue of S-adenosylmethionine. S-n-Butyl-L-homocysteine reacted sparingly with this strain, but S-isopropyl-L-homocysteine failed to form detectable quantities of the corresponding S-adenosylsulfonium compound. The S-n-propyl compound was isolated by extraction of the cells, followed by ion-exchange chromatography, which separated it from endogenous S-adenosylmethionine. The structure was determined by hydrolytic procedures leading to overlapping fragments of known structure, 5'-n-propylthioadenosine and S-n-propyl-L-homocysteine. The new sulfonium compound was examined for its activity as n-propyl donor by substituting it for S-adenosylmethionine in methyltransferase systems. Enzymatic transpropylation was observed with S-adenosylmethionine : L-homocysteine S-methyltransferase (EC 2.1.1.10). Its rate was low in the S-adenosylmethionine : N-acetylserotonin O-methyltransferase system (EC 2.1.1.4), and below recognition with S-adenosylmethionine : guanidinoacetate methyltransferase (EC 2.1.1.2) and S-adenosylmethionine : histamine N-methyltransferase (EC 2.1.1.8).
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