Crystal structure of the M. tuberculosis phosphate binding protein PstS3

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 

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Crystal structure of the Mycobacterium tuberculosis phosphate binding protein PstS3.

Ferraris, D.M.Spallek, R.Oehlmann, W.Singh, M.Rizzi, M.

(2014) Proteins 82: 2268-2274

  • DOI: https://doi.org/10.1002/prot.24548
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Mycobacterium tuberculosis evades host immune responses by colonizing macrophages. Intraphagosomal M. tuberculosis is exposed to environmental stresses such as reactive oxygen and nitrogen intermediates as well as acid shock and inorganic phosphate (Pi) depletion. Experimental evidence suggests that expression levels of mycobacterial protein PstS3 (Rv0928) are significantly increased when M. tuberculosis bacilli are exposed to Pi starvation. Hence, PstS3 may be important for survival of Mtb in conditions where there is limited supply of Pi. We report here the structure of PstS3 from M. tuberculosis at 2.3-Å resolution. The protein presents a structure typical for ABC phosphate transfer receptors. Comparison with its cognate receptor PstS1 showed a different pattern distribution of surface charges in proximity to the Pi recognition site, suggesting complementary roles of the two proteins in Pi uptake.

  • Organizational Affiliation

    Department of Pharmaceutical Sciences, Università del Piemonte Orientale "A. Avogadro,", Largo Donegani 2, 28100, Novara, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphate-binding protein PstS 3
A, B
376Mycobacterium tuberculosisMutation(s): 0 
Gene Names: pstS3phoS2Rv0928MT0955MTCY21C12.22
Find proteins for P9WGT7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WGT7 
Go to UniProtKB:  P9WGT7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WGT7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.207α = 90
b = 229.253β = 100.03
c = 39.103γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
DNAdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-26
    Type: Initial release
  • Version 1.1: 2014-04-02
    Changes: Database references
  • Version 1.2: 2014-09-03
    Changes: Database references
  • Version 1.3: 2019-07-17
    Changes: Data collection, Refinement description