Isotope effects in the study of enzymatic phosphoryl transfer reactions
Document Type
Article
Journal/Book Title
FEBS Letters
Publication Date
2001
Volume
501
First Page
99
Last Page
102
Abstract
Protein-tyrosine phosphatases and serine/threonine protein phosphatases utilize very different catalytic machinery to catalyze phosphoryl transfer reactions. Tyrosine is a better leaving group than serine or threonine, having a pKa more than three units lower. Has the difference in the catalytic machinery used by these enzyme families evolved as a result of the difference in the lability of their substrates? Are the transition states for phosphoryl transfer similar for the two classes of enzymes? This review summarizes what has been learned from kinetic isotope effects about the nature of enzymatic phosphoryl transfer, and how the enzymatic mechanisms compare to uncatalyzed phosphoryl transfer reactions.
Recommended Citation
A. C. Hengge “Isotope effects in the study of enzymatic phosphoryl transfer reactions.” FEBS Letters 2001 501, 99-102. (invited review)