3TAO

Structure of Mycobacterium tuberculosis triosephosphate isomerase bound to phosphoglycolohydroxamate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 

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This is version 1.1 of the entry. See complete history


Literature

Structural and functional characterization of Mycobacterium tuberculosis triosephosphate isomerase.

Connor, S.E.Capodagli, G.C.Deaton, M.K.Pegan, S.D.

(2011) Acta Crystallogr D Biol Crystallogr 67: 1017-1022

  • DOI: 10.1107/S0907444911042971
  • Primary Citation of Related Structures:  
    3TA6, 3TAO

  • PubMed Abstract: 
  • Tuberculosis (TB) is a major infectious disease that accounts for over 1.7 million deaths every year. Mycobacterium tuberculosis, the causative agent of tuberculosis, enters the human host by the inhalation of infectious aerosols. Additionally, one third of the world's population is likely to be infected with latent TB ...

    Tuberculosis (TB) is a major infectious disease that accounts for over 1.7 million deaths every year. Mycobacterium tuberculosis, the causative agent of tuberculosis, enters the human host by the inhalation of infectious aerosols. Additionally, one third of the world's population is likely to be infected with latent TB. The incidence of TB is on the rise owing in part to the emergence of multidrug-resistant strains. As a result, there is a growing need to focus on novel M. tuberculosis enzyme targets. M. tuberculosis triosephosphate isomerase (MtTPI) is an essential enzyme for gluconeogenetic pathways, making it a potential target for future therapeutics. In order to determine its structure, the X-ray crystal structure of MtTPI has been determined, as well as that of MtTPI bound with a reaction-intermediate analog. As a result, two forms of the active site were revealed. In conjunction with the kinetic parameters obtained for the MtTPI-facilitated conversion of dihydroxyacetone phosphate (DHAP) to D-glyceraldehyde-3-phosphate (D-GAP), this provides a greater structural and biochemical understanding of this enzyme. Additionally, isothermal titration calorimetry was used to determine the binding constant for a reaction-intermediate analog bound to the active site of MtTPI.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Denver, Denver, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Triosephosphate isomeraseA, B267Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: MT1482MTCY493.16cRv1438tpitpiA
EC: 5.3.1.1
UniProt
Find proteins for P9WG43 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WG43 
Go to UniProtKB:  P9WG43
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGH (Subject of Investigation/LOI)
Query on PGH

Download Ideal Coordinates CCD File 
C [auth A], D [auth A]PHOSPHOGLYCOLOHYDROXAMIC ACID
C2 H6 N O6 P
BAXHHWZKQZIJID-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
PGH PDBBind:  3TAO Kd: 7280 (nM) from 1 assay(s)
Binding MOAD:  3TAO Kd: 7280 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.026α = 90
b = 55.736β = 104.03
c = 76.941γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-30
    Type: Initial release
  • Version 1.1: 2012-03-28
    Changes: Database references