4MFI

Crystal structure of Mycobacterium tuberculosis UgpB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.136 

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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
  • Primary Citation of Related Structures:  
    4MFI

  • 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 studied since the discovery of M ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sn-glycerol-3-phosphate ABC transporter substrate-binding protein UspBA436Mycobacterium tuberculosis H37RaMutation(s): 0 
Gene Names: MRA_2856ugpB
UniProt
Find proteins for A5U6I5 (Mycobacterium tuberculosis (strain ATCC 25177 / H37Ra))
Explore A5U6I5 
Go to UniProtKB:  A5U6I5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.136 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.745α = 90
b = 72.2β = 96.41
c = 41.817γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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