4MFI

Crystal structure of Mycobacterium tuberculosis UgpB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.135 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural analysis of Mycobacterium tuberculosis ATP-binding cassette transporter subunit UgpB reveals specificity for glycerophosphocholine

Jiang, D.Zhang, Q.Zheng, Q.Zhou, H.Jin, J.Zhou, W.Bartlam, M.Rao, Z.

(2014) Febs J. 281: 331-341

  • DOI: 10.1111/febs.12600

  • PubMed Abstract: 
  • Tuberculosis (TB), caused by Mycobacterium tuberculosis, is one of the most devastating human diseases, and is responsible for ~ 2 million deaths worldwide each year. The nutritional requirements for the growth of mycobacteria have been extensively s ...

    Tuberculosis (TB), caused by Mycobacterium tuberculosis, is one of the most devastating human diseases, and is responsible for ~ 2 million deaths worldwide each year. The nutritional requirements for the growth of mycobacteria have been extensively studied since the discovery of M. tuberculosis, but the essential nutrients for M. tuberculosis inside the human host and the identity of the corresponding transporters remain unknown. The UgpABCE transporter of M. tuberculosis is one of five putative permeases for carbohydrate uptake, and is genetically predicted to be an sn-glycerol 3-phosphate importer. We have determined the 1.5-Å crystal structure of M. tuberculosis UgpB, which has been reported to be a promising vaccine candidate against TB. M. tuberculosis UgpB showed no detectable binding activity for sn-glycerol 3-phosphate by isothermal titration calorimetry, but instead showed a preference for glycerophosphocholine (GPC). M. tuberculosis UgpB largely resembles its Escherichia coli homolog, but with the critical Trp169 in the substrate-binding site of E. coli UgpB replaced by Leu205. Mutation of Leu205 abolishes GPC binding, suggesting that Leu205 is a determinant of GPC binding. The work reported here not only contributes to our understanding of the carbon and phosphate sources utilized by M. tuberculosis inside the human host, but will also promote improvements in TB chemotherapy.


    Organizational Affiliation

    State Key Laboratory of Medicinal Chemical Biology, Tianjin, China; College of Life Sciences, Nankai University, Tianjin, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sn-glycerol-3-phosphate ABC transporter substrate-binding protein UspB
A
436Mycobacterium tuberculosis (strain ATCC 25177 / H37Ra)Mutation(s): 0 
Gene Names: ugpB
Find proteins for A5U6I5 (Mycobacterium tuberculosis (strain ATCC 25177 / H37Ra))
Go to UniProtKB:  A5U6I5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.135 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 154.745α = 90.00
b = 72.200β = 96.41
c = 41.817γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
HKL-2000data reduction
PHENIXrefinement
PHENIXphasing
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-23
    Type: Initial release