Inactivation of <i>S-</i>Adenosyl-<scp>l</scp>-homocysteine Hydrolase by Amide and Ester Derivatives of Adenosine-5‘-carboxylic Acid
作者:Stanislaw F. Wnuk、Siming Liu、Chong-Sheng Yuan、Ronald T. Borchardt、Morris J. Robins
DOI:10.1021/jm960313y
日期:1996.1.1
S-Adenosyl-L-homocysteine (AdoHcy) hydrolase has been shown to have (5'/6') hydrolytic activity with vinyl (5') or homovinyl (6') halides derived from adenosine (Ado). This hydrolytic activity is independent of its 3'-oxidative activity. The vinyl (or homovinyl) halides are converted into 5'(or 6')-carboxaldehydes by the hydrolytic activity of the enzyme, and inactivation occurs via the oxidative activity. Amide and ester derivatives of Ado-5'-carboxylic acid were prepared to further probe the hydrolytic capability of AdoHcy hydrolase. The oxidative activity (but not the hydrolytic activity) is involved in the mechanism of inhibition of the enzyme by the ester and amide derivatives of Ado-5'-carboxylic acid, in contrast to the inactivation of this enzyme by adenosine-derived vinyl or homovinyl halide analogues during which both activities are manifested.
Modification of the 5' position of purine nucleosides. 2. Synthesis and some cardiovascular properties of adenosine-5'-(N-substituted)carboxamides
作者:Raj Nandan Prasad、Dilbagh S. Bariana、Anthony Fung、Milica Savic、Karin Tietje、Herman H. Stein、Harold Brondyk、Richard S. Egan
DOI:10.1021/jm00177a021
日期:1980.3
of the esters of adenosine-5'-carboxylic acid, a systematic study of the corresponding amides (14--50) was undertaken. In addition, several other analogues containing the N1-oxide function (51--52) or 2',3' substituents (3--9, 53--54) were studied.