Article
The Nonexistence of Specially Stabilized Hydrogen Bonds in Enzymes
Journal of the American Chemical Society
(1995)
Abstract
Ab initio calculations are used to test a recent suggestion that enzymic catalysis can be aided by strengthening of a hydrogen bond in a key intermediate, occurring when this bond is shortened and the pKa’s of the two groups are equalized. The requisite amount of energy is not available in electrically neutral H-bonds; no additional strengthening can be accomplished by shortening such a bond. Interaction energies where one subunit is charged, on the other hand, can be very high. These bonds are intrinsically very short, and the proton transfer profile contains a very low energy barrier. There is no special stabilization associated with the disappearance of the transfer barrier or equalization of the pKa’s.
Keywords
- nonexistence,
- stabilized,
- hydrogen,
- bonds,
- enzymes
Disciplines
Publication Date
July 1, 1995
Publisher Statement
Originally published in the Journal of the American Chemical Society by the American Chemical Society . Publisher’s PDF available through remote link. DOI: 10.1021/ja00131a020
Citation Information
The Nonexistence of Specially Stabilized Hydrogen Bonds in Enzymes
S. Scheiner, T. Kar
J. Am. Chem. Soc. 1995 117 (26), 6970-6975.