Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
SUBSTITUENT EFFECT ON RIBONUCLEASE T1-CATALYZED TRANSPHOSPHORYLATION OF para-SUBSTITUTED BENZYL ESTERS OF GUANOSINE 3′-PHOSPHATE
Kimihiko SatohYasuo Inoue
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1975 Volume 4 Issue 6 Pages 551-556

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Abstract

The maximal velocities have been measured for the ribonuclease T1- catalyzed transphosphorylation of a series of substrates named in the title. Based on the present results together with other relevant data, it is concluded that the catalysis involves nucleophilic component as well as electrophilic character, and the breakdown of a pentacovalent intermediate is not rate-limiting. We have proposed a possible mechanism most pertinent to a description of the ribonuclease T1 action.

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