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The enzymatic synthesis of S-adenosyl-l-[2(n)-3H]homocysteine

✍ Scribed by R.W. Trewyn; S.J. Kerr


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
422 KB
Volume
82
Category
Article
ISSN
0003-2697

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✦ Synopsis


A rapid, efficient method is described for the enzymatic conversion of S-adenosyl-L-[2(n)-3H]methionine to S-adenosyl-r-[2(n)-3H]homocysteine. Partially purified glycine N-methyltransferase is used in the reaction which yields 98% conversion. The product is purified using high-pressure liquid chromatography and is concentrated by lyophilization.

S-Adenosyl-L-[2(n)-3H]homocysteine synthesized by this method is an active substrate for S-adenosylhomocysteine @AH) hydrolase. A novel assay procedure for SAH hydrolase is also described, in which unreactedS-adenosyl-L-[2(n)-3H]homocysteine is removed by adsorption to dextran-coated charcoal.


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