4KW5 image
Deposition Date 2013-05-23
Release Date 2013-07-10
Last Version Date 2023-09-20
Entry Detail
PDB ID:
4KW5
Title:
M. tuberculosis DprE1 in complex with inhibitor TCA1
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.61 Å
R-Value Free:
0.24
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Oxidoreductase
Mutations:wild-type
Chain IDs:A, B
Chain Length:461
Number of Molecules:2
Biological Source:Mycobacterium tuberculosis
Primary Citation
Identification of a small molecule with activity against drug-resistant and persistent tuberculosis.
Proc.Natl.Acad.Sci.USA 110 E2510 E2517 (2013)
PMID: 23776209 DOI: 10.1073/pnas.1309171110

Abstact

A cell-based phenotypic screen for inhibitors of biofilm formation in mycobacteria identified the small molecule TCA1, which has bactericidal activity against both drug-susceptible and -resistant Mycobacterium tuberculosis (Mtb) and sterilizes Mtb in vitro combined with rifampicin or isoniazid. In addition, TCA1 has bactericidal activity against nonreplicating Mtb in vitro and is efficacious in acute and chronic Mtb infection mouse models both alone and combined with rifampicin or isoniazid. Transcriptional analysis revealed that TCA1 down-regulates genes known to be involved in Mtb persistence. Genetic and affinity-based methods identified decaprenyl-phosphoryl-β-D-ribofuranose oxidoreductase DprE1 and MoeW, enzymes involved in cell wall and molybdenum cofactor biosynthesis, respectively, as targets responsible for the activity of TCA1. These in vitro and in vivo results indicate that this compound functions by a unique mechanism and suggest that TCA1 may lead to the development of a class of antituberculosis agents.

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Primary Citation of related structures