4ZDJ

Crystal structure of the M. tuberculosis CTP synthase PyrG in complex with two UTP molecules


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Thiophenecarboxamide Derivatives Activated by EthA Kill Mycobacterium tuberculosis by Inhibiting the CTP Synthetase PyrG.

Mori, G.Chiarelli, L.R.Esposito, M.Makarov, V.Bellinzoni, M.Hartkoorn, R.C.Degiacomi, G.Boldrin, F.Ekins, S.de Jesus Lopes Ribeiro, A.L.Marino, L.B.Centarova, I.Svetlikova, Z.Blasko, J.Kazakova, E.Lepioshkin, A.Barilone, N.Zanoni, G.Porta, A.Fondi, M.Fani, R.Baulard, A.R.Mikusova, K.Alzari, P.M.Manganelli, R.de Carvalho, L.P.Riccardi, G.Cole, S.T.Pasca, M.R.

(2015) Chem Biol 22: 917-927

  • DOI: 10.1016/j.chembiol.2015.05.016
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • To combat the emergence of drug-resistant strains of Mycobacterium tuberculosis, new antitubercular agents and novel drug targets are needed. Phenotypic screening of a library of 594 hit compounds uncovered two leads that were active against M. tuber ...

    To combat the emergence of drug-resistant strains of Mycobacterium tuberculosis, new antitubercular agents and novel drug targets are needed. Phenotypic screening of a library of 594 hit compounds uncovered two leads that were active against M. tuberculosis in its replicating, non-replicating, and intracellular states: compounds 7947882 (5-methyl-N-(4-nitrophenyl)thiophene-2-carboxamide) and 7904688 (3-phenyl-N-[(4-piperidin-1-ylphenyl)carbamothioyl]propanamide). Mutants resistant to both compounds harbored mutations in ethA (rv3854c), the gene encoding the monooxygenase EthA, and/or in pyrG (rv1699) coding for the CTP synthetase, PyrG. Biochemical investigations demonstrated that EthA is responsible for the activation of the compounds, and by mass spectrometry we identified the active metabolite of 7947882, which directly inhibits PyrG activity. Metabolomic studies revealed that pharmacological inhibition of PyrG strongly perturbs DNA and RNA biosynthesis, and other metabolic processes requiring nucleotides. Finally, the crystal structure of PyrG was solved, paving the way for rational drug design with this newly validated drug target.


    Organizational Affiliation

    Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, 27100 Pavia, Italy. Electronic address: mariarosalia.pasca@unipv.it.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CTP synthaseA587Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: pyrGRv1699MTCI125.21
EC: 6.3.4.2
Find proteins for P9WHK7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WHK7 
Go to UniProtKB:  P9WHK7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UTP
Query on UTP

Download CCD File 
A
URIDINE 5'-TRIPHOSPHATE
C9 H15 N2 O15 P3
PGAVKCOVUIYSFO-XVFCMESISA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.41α = 90
b = 132.73β = 90
c = 157.63γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European CommissionFranceHEALTH-F3-2011-260872

Revision History 

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-08-05
    Changes: Database references