3G1M

EthR from Mycobacterium tuberculosis in complex with compound BDM31381

DOI: 10.2210/pdb3G1M/pdb

Classification: TRANSCRIPTION
Organism(s): Mycobacterium tuberculosis
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2009-01-30 Released: 2009-07-21
Deposition Author(s): Willand, N., Dirie, B., Carette, X., Bifani, P., Singhal, A., Desroses, M., Leroux, F., Willery, E., Mathys, V., Deprez-Poulain, R., Delcroix, G., Frenois, F., Aumercier, M., Locht, C., Villeret, V., Deprez, B., Baulard, A.R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.70 Å
R-Value Free: 0.213
R-Value Work: 0.182
R-Value Observed: 0.183

wwPDB Validation3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Synthetic EthR inhibitors boost antituberculous activity of ethionamide.

Willand, N., Dirie, B., Carette, X., Bifani, P., Singhal, A., Desroses, M., Leroux, F., Willery, E., Mathys, V., Deprez-Poulain, R., Delcroix, G., Frenois, F., Aumercier, M., Locht, C., Villeret, V., Deprez, B., Baulard, A.R.

(2009) Nat Med 15: 537-544

PubMed: 19412174 Search on PubMed
DOI: 10.1038/nm.1950
Structures With Same Primary Citation

PubMed Abstract:

The side effects associated with tuberculosis therapy bring with them the risk of noncompliance and subsequent drug resistance. Increasing the therapeutic index of antituberculosis drugs should thus improve treatment effectiveness. Several antituberculosis compounds require in situ metabolic activation to become inhibitory. Various thiocarbamide-containing drugs, including ethionamide, are activated by the mycobacterial monooxygenase EthA, the production of which is controlled by the transcriptional repressor EthR. Here we identify drug-like inhibitors of EthR that boost the bioactivation of ethionamide. Compounds designed and screened for their capacity to inhibit EthR-DNA interaction were co-crystallized with EthR. We exploited the three-dimensional structures of the complexes for the synthesis of improved analogs that boosted the ethionamide potency in culture more than tenfold. In Mycobacterium tuberculosis-infected mice, one of these analogs, BDM31343, enabled a substantially reduced dose of ethionamide to lessen the mycobacterial load as efficiently as the conventional higher-dose treatment. This provides proof of concept that inhibiting EthR improves the therapeutic index of thiocarbamide derivatives, which should prompt reconsideration of their use as first-line drugs.

Related Citations:

Insights into mechanisms of induction and ligands recognition in the transcriptional repressor EthR from Mycobacterium tuberculosis.
Frenois, F., Baulard, A.R., Villeret, V.
(2006) Tuberculosis (Edinb) 86: 110

Structure of EthR in a ligand bound conformation reveals therapeutic perspectives against tuberculosis.
Frenois, F., Engohang-Ndong, J., Locht, C., Baulard, A.R., Villeret, V.
(2004) Mol Cell 16: 301

EthR, a repressor of the TetR/CamR family implicated in ethionamide resistance in mycobacteria, octamerizes cooperatively on its operator.
Engohang-Ndong, J., Baillat, D., Aumercier, M., Bellefontaine, F., Besra, G.S., Locht, C., Baulard, A.R.
(2004) Mol Microbiol 51: 175

Organizational Affiliation:

Institut National de la Santé et de la Recherche Médicale, Lille, France.

Macromolecules

Find similar proteins by: Sequence | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
TRANSCRIPTIONAL REGULATORY REPRESSOR PROTEIN (TETR-FAMILY) ETHR	A	236	Mycobacterium tuberculosis	Mutation(s): 0 Gene Names: ethR, MT3970, Rv3855
Find proteins for P9WMC1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Go to UniProtKB: P9WMC1
Protein Feature View Full Protein Feature View for P9WMC1

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
RF3 Query on RF3 Download CCD File	A	1-(thiophen-2-ylacetyl)-4-(3-thiophen-2-yl-1,2,4-oxadiazol-5-yl)piperidine C₁₇ H₁₇ N₃ O₂ S₂ SJEVDMFUHCVNPM-UHFFFAOYSA-N		Ligand Interaction