4MQL

Crystal structure of Antigen 85C-C209S mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mechanism of inhibition of Mycobacterium tuberculosis antigen 85 by ebselen.

Favrot, L.Grzegorzewicz, A.E.Lajiness, D.H.Marvin, R.K.Boucau, J.Isailovic, D.Jackson, M.Ronning, D.R.

(2013) Nat Commun 4: 2748-2748

  • DOI: 10.1038/ncomms3748
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The increasing prevalence of drug-resistant tuberculosis highlights the need for identifying new antitubercular drugs that can treat these infections. The antigen 85 (Ag85) complex has emerged as an intriguing mycobacterial drug target due to its cen ...

    The increasing prevalence of drug-resistant tuberculosis highlights the need for identifying new antitubercular drugs that can treat these infections. The antigen 85 (Ag85) complex has emerged as an intriguing mycobacterial drug target due to its central role in synthesizing major components of the inner and outer leaflets of the mycobacterial outer membrane. Here we identify ebselen (EBS) as a potent inhibitor of the Mycobacterium tuberculosis Ag85 complex. Mass spectrometry data show that EBS binds covalently to a cysteine residue (C209) located near the Ag85C active site. The crystal structure of Ag85C in the presence of EBS shows that C209 modification restructures the active site, thereby disrupting the hydrogen-bonded network within the active site that is essential for enzymatic activity. C209 mutations display marked decreases in enzymatic activity. These data suggest that compounds using this mechanism of action will strongly inhibit the Ag85 complex and minimize the selection of drug resistance.


    Organizational Affiliation

    Department of Chemistry, University of Toledo, Toledo, Ohio 43606-3390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Diacylglycerol acyltransferase/mycolyltransferase Ag85C
A
304Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 1 
Gene Names: fbpC (mpt45)
EC: 2.3.1.122, 2.3.1.20
Find proteins for P9WQN9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WQN9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BTB
Query on BTB

Download SDF File 
Download CCD File 
A
2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
BIS-TRIS BUFFER
C8 H19 N O5
OWMVSZAMULFTJU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.153 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 135.764α = 90.00
b = 68.171β = 94.03
c = 35.908γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHENIXrefinement
PHENIXmodel building
PHENIXphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-13
    Type: Initial release
  • Version 1.1: 2013-12-25
    Type: Database references