Download MendeleyActive- and Allosteric-Site Cyclic Peptide Inhibitors of Secreted M. tuberculosis Chorismate Mutase.
van Neer, R.H.P., Dranchak, P.K., Aitha, M., Liu, L., Carlson, E.K., Jacobsen, I.E., Battaile, K., Fang, Y., Tao, D., Rai, G., Padia, J., Lovell, S., Suga, H., Inglese, J.(2025) ACS Infect Dis 11: 703-714
- PubMed: 39903128
- DOI: https://doi.org/10.1021/acsinfecdis.4c00798
- Primary Citation of Related Structures:
9BT3, 9BT6, 9BT7 - PubMed Abstract:
The secreted Chorismate mutase enzyme of Mycobacterium tuberculosis (* Mtb CM) is an underexplored potential target for the development of new antitubercular agents that are increasingly needed as antibiotic resistance rises in prevalence. As an enzyme suspected to be involved in virulence and host-pathogen interactions, disruption of its function could circumvent the difficulty of treating tuberculosis-infected granulomas. Drug development, however, is limited by novel ligand discovery. Currently, * Mtb CM activity is measured by using a low throughput acid/base-mediated product derivatization absorbance assay. Here, we utilized an RNA-display affinity selection approach enabled by the Random Peptides Integrated Discovery (RaPID) system to screen a vast library of macrocyclic peptides (MCP) for novel * Mtb CM ligands. Peptides identified from the RaPID selection, and analogs thereof identified by analyzing the selection population dynamics, produced a new class of * Mtb CM inhibiting MCPs. Among these were two noteworthy "chorismides", whose binding modes were elucidated by X-ray crystallography. Both were potent inhibitors of the CM enzyme activity. One was identified as an allosteric binding peptide revealing a novel inhibition approach, while the other is an active-site binding peptide that when conjugated to a fluorescent probe allowed for the development of a series of alternative fluorescence-based ligand-displacement assays that can be utilized for the assessment of potential * Mtb CM inhibitors.
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland 20850, United States.
Organizational Affiliation:
