Iodinated form of the Mycobacterium tuberculosis repressor EthR2

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.243 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Reversion of antibiotic resistance in Mycobacterium tuberculosis by spiroisoxazoline SMARt-420.

Blondiaux, N.Moune, M.Desroses, M.Frita, R.Flipo, M.Mathys, V.Soetaert, K.Kiass, M.Delorme, V.Djaout, K.Trebosc, V.Kemmer, C.Wintjens, R.Wohlkonig, A.Antoine, R.Huot, L.Hot, D.Coscolla, M.Feldmann, J.Gagneux, S.Locht, C.Brodin, P.Gitzinger, M.Deprez, B.Willand, N.Baulard, A.R.

(2017) Science 355: 1206-1211

  • DOI: https://doi.org/10.1126/science.aag1006
  • Primary Citation of Related Structures:  
    5ICJ, 5N1C, 5N1I

  • PubMed Abstract: 

    Antibiotic resistance is one of the biggest threats to human health globally. Alarmingly, multidrug-resistant and extensively drug-resistant Mycobacterium tuberculosis have now spread worldwide. Some key antituberculosis antibiotics are prodrugs, for which resistance mechanisms are mainly driven by mutations in the bacterial enzymatic pathway required for their bioactivation. We have developed drug-like molecules that activate a cryptic alternative bioactivation pathway of ethionamide in M. tuberculosis , circumventing the classic activation pathway in which resistance mutations have now been observed. The first-of-its-kind molecule, named SMARt-420 (Small Molecule Aborting Resistance), not only fully reverses ethionamide-acquired resistance and clears ethionamide-resistant infection in mice, it also increases the basal sensitivity of bacteria to ethionamide.

  • Organizational Affiliation

    Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR8204-CIIL-Center for Infection and Immunity of Lille, F-59000 Lille, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable transcriptional regulatory protein
A, B
221Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: Rv0078LH57_00450
Find proteins for O53623 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore O53623 
Go to UniProtKB:  O53623
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO53623
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.243 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.43α = 90
b = 75.04β = 90
c = 88γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
BUCCANEERmodel building

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-26
    Type: Initial release
  • Version 1.1: 2017-12-13
    Changes: Database references
  • Version 1.2: 2023-03-01
    Changes: Advisory, Database references