3MAY

Crystal structure of a secreted Mycobacterium tuberculosis heme-binding protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Discovery and characterization of a unique mycobacterial heme acquisition system.

Tullius, M.V.Harmston, C.A.Owens, C.P.Chim, N.Morse, R.P.McMath, L.M.Iniguez, A.Kimmey, J.M.Sawaya, M.R.Whitelegge, J.P.Horwitz, M.A.Goulding, C.W.

(2011) Proc Natl Acad Sci U S A 108: 5051-5056

  • DOI: 10.1073/pnas.1009516108
  • Primary Citation of Related Structures:  
    3MAY

  • PubMed Abstract: 
  • Mycobacterium tuberculosis must import iron from its host for survival, and its siderophore-dependent iron acquisition pathways are well established. Here we demonstrate a newly characterized pathway, whereby M. tuberculosis can use free heme and heme from hemoglobin as an iron source ...

    Mycobacterium tuberculosis must import iron from its host for survival, and its siderophore-dependent iron acquisition pathways are well established. Here we demonstrate a newly characterized pathway, whereby M. tuberculosis can use free heme and heme from hemoglobin as an iron source. Significantly, we identified the genomic region, Rv0202c-Rv0207c, responsible for the passage of heme iron across the mycobacterial membrane. Key players of this heme uptake system were characterized including a secreted protein and two transmembrane proteins, all three specific to mycobacteria. Furthermore, the crystal structure of the key heme carrier protein Rv0203 was found to have a unique fold. The discovery of a unique mycobacterial heme acquisition pathway opens new avenues of exploration into mycobacterial therapeutics.


    Organizational Affiliation

    Departments of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
POSSIBLE EXPORTED PROTEINA, B, C, D, E, G [auth F], F [auth G], H101Mycobacterium tuberculosisMutation(s): 0 
Gene Names: MT0213Rv0203
UniProt
Find proteins for O53654 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh))
Explore O53654 
Go to UniProtKB:  O53654
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.671α = 90
b = 72.671β = 90
c = 173.909γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MLPHAREphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance