1Y25

structure of mycobacterial thiol peroxidase Tpx


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the inactive variant C60S of Mycobacterium tuberculosis thiol peroxidase

Stehr, M.Hecht, H.J.Jager, T.Flohe, L.Singh, M.

(2006) Acta Crystallogr.,Sect.D 62: 563-567

  • DOI: 10.1107/S0907444906008249

  • PubMed Abstract: 
  • The genome of Mycobacterium tuberculosis encodes several peroxiredoxins (Prxs) thought to be active against organic and inorganic peroxides. The open reading frame Rv1932 encodes a 165-residue thiol peroxidase (Tpx), which belongs to the atypical 2-C ...

    The genome of Mycobacterium tuberculosis encodes several peroxiredoxins (Prxs) thought to be active against organic and inorganic peroxides. The open reading frame Rv1932 encodes a 165-residue thiol peroxidase (Tpx), which belongs to the atypical 2-Cys peroxiredoxin family. The crystal structure of the C60S mutant of M. tuberculosis Tpx (MtTpx) crystallized in space group P3(1)21, with unit-cell parameters a = 106.08, b = 106.08, c = 65.33 A. The structure has been refined to an R value of 17.1% (R(free) = 24.9%) at 2.1 A resolution. MtTpx is structurally homologous to other peroxiredoxins, including the mycobacterial AhpC and AhpE. The inactive MtTpx C60S mutant structure closely resembles the structure of Streptococcus pneumoniae Tpx (SpTpx) and thus represents the reduced enzyme state. The mutated active-site serine is electrostatically linked to Arg130 and hydrogen bonded to Thr57, practically identical to the cysteine in SpTpx. A cocrystallized acetate molecule mimics the position of the substrate and interacts with Ser60, Arg130 and Thr57.


    Organizational Affiliation

    Department GNA, GBF - Gesellschaft für Biotechnologische Forschung, Mascheroder Weg 1, D-38124 Braunschweig, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable thiol peroxidase
A, B
165Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 1 
Gene Names: tpx
EC: 1.11.1.15
Find proteins for P9WG35 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WG35
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.171 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 106.089α = 90.00
b = 106.089β = 90.00
c = 65.334γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
CCP4data scaling
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance