Escherichia coli topoisomerase IV E subunit and an inhibitor binding mode revealed by NMR spectroscopy

Escherichia coli topoisomerase IV E subunit and an inhibitor binding mode revealed by NMR spectroscopy
Title:
Escherichia coli topoisomerase IV E subunit and an inhibitor binding mode revealed by NMR spectroscopy
Other Titles:
Journal of Biological Chemistry
Publication Date:
30 June 2016
Citation:
Yan Li, Ying Lei Wong, Fui Mee Ng, Boping Liu, Yun Xuan Wong, Zhi Ying Poh, Shuang Liu, Siew Wen Then, Michelle Yueqi Lee, Hui Qi Ng, Qiwei Huang, Alvin W. Hung, Joseph Cherian, Jeffrey Hill, Thomas H. Keller, and Congbao Kang Escherichia coli topoisomerase IV E subunit and an inhibitor binding mode revealed by NMR spectroscopy J. Biol. Chem. jbc.M116.737429. doi:10.1074/jbc.M116.737429
Abstract:
Bacterial topoisomerases are attractive antibacterial drug targets due to their importance in bacterial growth and low homology with other human topoisomerases. Structure-based drug design has been a proven approach of efficiently developing new antibiotics against these targets. Past studies have focused on developing lead compounds against the ATP binding pockets of both DNA gyrase and topoisomerase IV. The detailed understanding of interactions between ligand and target in solution state will provide valuable information toward further developing drugs against topoisomerase IV targets. Herein, we described the detailed characterization of a known potent inhibitor containing a 9H-pyrimido[4,5-b]indole scaffold against the N-terminal domain of topoisomerase IV E subunit from E. coli (eParE). Using a series of biophysical and biochemical experiments, it has been demonstrated that this inhibitor forms a tight complex with eParE. NMR studies revealed the exact protein residues responsible for inhibitor binding. Through the comparative studies between two inhibitors of markedly varied potencies, it is hypothesized that gaining molecular interactions with residues in the α4 and residues close to the loop of beta1-alpha2 and residues in the loop of beta3-beta4 might improve the inhibitor potency.
License type:
PublisherCopyrights
Funding Info:
A*STAR JCO grants (1331A028, 1231B015), A*STAR BMRC
Description:
ISSN:
1083-351X
0021-9258
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