Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non‐diphosphate Inhibitors
Abstract
Abstract Isoprenoid biosynthesis is an important area for anti‐infective drug development. One isoprenoid target is ( E )‐1‐hydroxy‐2‐methyl‐but‐2‐enyl 4‐diphosphate (HMBPP) reductase (IspH), which forms isopentenyl diphosphate and dimethylallyl diphosphate from HMBPP in a 2H + /2e − reduction. IspH contains a 4 Fe−4 S cluster, and in this work, we first investigated how small molecules bound to the cluster by using HYSCORE and NRVS spectroscopies. The results of these, as well as other structural and spectroscopic investigations, led to the conclusion that, in most cases, ligands bound to IspH 4 Fe−4 S clusters by η 1 coordination, forming tetrahedral geometries at the unique fourth Fe, ligand side chains preventing further ligand (e.g., H 2 O, O 2 ) binding. Based on these ideas, we used in silico methods to find drug‐like inhibitors that might occupy the HMBPP substrate binding pocket and bind to Fe, leading to the discovery of a barbituric acid analogue with a K i value of ≈500 n m against Pseudomonas aeruginosa IspH.
- Authors:
-
- Department of Chemistry University of Illinois 600 South Mathews Avenue Urbana IL 61801 USA
- Department of Chemistry and Biochemistry University of California at San Diego La Jolla CA 92093 USA
- Department of Chemistry University of California 1 Shields Avenue Davis CA 95616 USA, Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
- Center for Biophysics and Computational Biology 607 South Mathews Avenue Urbana IL 61801 USA
- Department of Chemistry and Biochemistry University of California at San Diego La Jolla CA 92093 USA, Howard Hughes Medical Institute University of California at San Diego La Jolla CA 92093 USA, National Biomedical Computation Resource University of California at San Diego La Jolla CA 92093 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1401763
- Grant/Contract Number:
- 39192/43032; 2015B1134
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- ChemBioChem: a European journal of chemical biology
- Additional Journal Information:
- Journal Name: ChemBioChem: a European journal of chemical biology Journal Volume: 18 Journal Issue: 10; Journal ID: ISSN 1439-4227
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- France
- Language:
- English
Citation Formats
O'Dowd, Bing, Williams, Sarah, Wang, Hongxin, No, Joo Hwan, Rao, Guodong, Wang, Weixue, McCammon, J. Andrew, Cramer, Stephen P., and Oldfield, Eric. Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non‐diphosphate Inhibitors. France: N. p., 2017.
Web. doi:10.1002/cbic.201700052.
O'Dowd, Bing, Williams, Sarah, Wang, Hongxin, No, Joo Hwan, Rao, Guodong, Wang, Weixue, McCammon, J. Andrew, Cramer, Stephen P., & Oldfield, Eric. Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non‐diphosphate Inhibitors. France. https://doi.org/10.1002/cbic.201700052
O'Dowd, Bing, Williams, Sarah, Wang, Hongxin, No, Joo Hwan, Rao, Guodong, Wang, Weixue, McCammon, J. Andrew, Cramer, Stephen P., and Oldfield, Eric. Fri .
"Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non‐diphosphate Inhibitors". France. https://doi.org/10.1002/cbic.201700052.
@article{osti_1401763,
title = {Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non‐diphosphate Inhibitors},
author = {O'Dowd, Bing and Williams, Sarah and Wang, Hongxin and No, Joo Hwan and Rao, Guodong and Wang, Weixue and McCammon, J. Andrew and Cramer, Stephen P. and Oldfield, Eric},
abstractNote = {Abstract Isoprenoid biosynthesis is an important area for anti‐infective drug development. One isoprenoid target is ( E )‐1‐hydroxy‐2‐methyl‐but‐2‐enyl 4‐diphosphate (HMBPP) reductase (IspH), which forms isopentenyl diphosphate and dimethylallyl diphosphate from HMBPP in a 2H + /2e − reduction. IspH contains a 4 Fe−4 S cluster, and in this work, we first investigated how small molecules bound to the cluster by using HYSCORE and NRVS spectroscopies. The results of these, as well as other structural and spectroscopic investigations, led to the conclusion that, in most cases, ligands bound to IspH 4 Fe−4 S clusters by η 1 coordination, forming tetrahedral geometries at the unique fourth Fe, ligand side chains preventing further ligand (e.g., H 2 O, O 2 ) binding. Based on these ideas, we used in silico methods to find drug‐like inhibitors that might occupy the HMBPP substrate binding pocket and bind to Fe, leading to the discovery of a barbituric acid analogue with a K i value of ≈500 n m against Pseudomonas aeruginosa IspH.},
doi = {10.1002/cbic.201700052},
journal = {ChemBioChem: a European journal of chemical biology},
number = 10,
volume = 18,
place = {France},
year = {Fri Apr 07 00:00:00 EDT 2017},
month = {Fri Apr 07 00:00:00 EDT 2017}
}
https://doi.org/10.1002/cbic.201700052
Web of Science
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