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Harel M, Quinn DM, Nair HK, Silman I, Sussman JL. The X-ray Structure of a Transition State Analog Complex Reveals the Molecular Origins of the Catalytic Power and Substrate Specificity of Acetylcholinesterase. J Am Chem Soc 1996. [DOI: 10.1021/ja952232h] [Citation(s) in RCA: 305] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michal Harel
- Contribution from the Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Biology and Chemistry Departments, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
| | - Daniel M. Quinn
- Contribution from the Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Biology and Chemistry Departments, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
| | - Haridasan K. Nair
- Contribution from the Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Biology and Chemistry Departments, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
| | - Israel Silman
- Contribution from the Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Biology and Chemistry Departments, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
| | - Joel L. Sussman
- Contribution from the Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Biology and Chemistry Departments, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
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Sohl J, Sutton LD, Burton DJ, Quinn DM. Haloketone transition state analog inhibitors of cholesterol esterase. Biochem Biophys Res Commun 1988; 151:554-60. [PMID: 3348795 DOI: 10.1016/0006-291x(88)90630-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The cholesterol esterase-catalyzed hydrolysis of p-nitro-phenyl butyrate is reversibly inhibited by four phenyl haloalkyl ketones. Inhibitor potency is greatest for halogenated acetophenones and parallels the extent of hydration of the various ketones in buffered D2O. These results are consistent with an inhibition mechanism wherein haloketones reversibly form hemiketal adducts at the active site that structurally mimic tetrahedral intermediates of the cholesterol esterase catalytic cycle.
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Affiliation(s)
- J Sohl
- Department of Chemistry, University of Iowa, Iowa City 52242
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