Journal of the American Chemical Society, volume 128, issue 4, pages 1293-1303

Alkaline Phosphatase Mono- and Diesterase Reactions:  Comparative Transition State Analysis

Publication typeJournal Article
Publication date2006-01-06
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor15
ISSN00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
Enzyme-catalyzed phosphoryl transfer reactions have frequently been suggested to proceed through transition states that are altered from their solution counterparts. Previous work with Escherichia coli alkaline phosphatase (AP), however, suggests that this enzyme catalyzes the hydrolysis of phosphate monoesters through a loose, dissociative transition state, similar to that in solution. AP also exhibits catalytic promiscuity, with a low level of phosphodiesterase activity, despite the tighter, more associative transition state for phosphate diester hydrolysis in solution. Because AP is evolutionarily optimized for phosphate monoester hydrolysis, it is possible that the active site environment alters the transition state for diester hydrolysis to be looser in its bonding to the incoming and outgoing groups. To test this possibility, we have measured the nonenzymatic and AP-catalyzed rate of reaction for a series of substituted methyl phenyl phosphate diesters. The values of beta(lg) and additional data suggest that the transition state for AP-catalyzed phosphate diester hydrolysis is indistinguishable from that in solution. Instead of altering transition state structure, AP catalyzes phosphoryl transfer reactions by recognizing and stabilizing transition states similar to those in aqueous solution. The AP active site therefore has the ability to recognize different transition states, a property that could assist in the evolutionary optimization of promiscuous activities.

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Zalatan J. G., Herschlag D. Alkaline Phosphatase Mono- and Diesterase Reactions: Comparative Transition State Analysis // Journal of the American Chemical Society. 2006. Vol. 128. No. 4. pp. 1293-1303.
GOST all authors (up to 50) Copy
Zalatan J. G., Herschlag D. Alkaline Phosphatase Mono- and Diesterase Reactions: Comparative Transition State Analysis // Journal of the American Chemical Society. 2006. Vol. 128. No. 4. pp. 1293-1303.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/ja056528r
UR - https://doi.org/10.1021/ja056528r
TI - Alkaline Phosphatase Mono- and Diesterase Reactions: Comparative Transition State Analysis
T2 - Journal of the American Chemical Society
AU - Zalatan, Jesse G
AU - Herschlag, Daniel
PY - 2006
DA - 2006/01/06 00:00:00
PB - American Chemical Society (ACS)
SP - 1293-1303
IS - 4
VL - 128
SN - 0002-7863
SN - 1520-5126
ER -
BibTex |
Cite this
BibTex Copy
@article{2006_Zalatan,
author = {Jesse G Zalatan and Daniel Herschlag},
title = {Alkaline Phosphatase Mono- and Diesterase Reactions: Comparative Transition State Analysis},
journal = {Journal of the American Chemical Society},
year = {2006},
volume = {128},
publisher = {American Chemical Society (ACS)},
month = {jan},
url = {https://doi.org/10.1021/ja056528r},
number = {4},
pages = {1293--1303},
doi = {10.1021/ja056528r}
}
MLA
Cite this
MLA Copy
Zalatan, Jesse G., and Daniel Herschlag. “Alkaline Phosphatase Mono- and Diesterase Reactions: Comparative Transition State Analysis.” Journal of the American Chemical Society, vol. 128, no. 4, Jan. 2006, pp. 1293-1303. https://doi.org/10.1021/ja056528r.
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