Crystal Structure of Recombinant TP0435 from Treponema pallidum

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.235 

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This is version 1.5 of the entry. See complete history


Insights into the potential function and membrane organization of the TP0435 (Tp17) lipoprotein from Treponema pallidum derived from structural and biophysical analyses.

Brautigam, C.A.Deka, R.K.Liu, W.Z.Norgard, M.V.

(2015) Protein Sci 24: 11-19

  • DOI: https://doi.org/10.1002/pro.2576
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The sexually transmitted disease syphilis is caused by the bacterial spirochete Treponema pallidum. This microorganism is genetically intractable, accounting for the large number of putative and undercharacterized members of the pathogen's proteome. In an effort to ascribe a function(s) to the TP0435 (Tp17) lipoprotein, we engineered a soluble variant of the protein (rTP0435) and determined its crystal structure at a resolution of 2.42 Å. The structure is characterized by an eight-stranded β-barrel protein with a shallow "basin" at one end of the barrel and an α-helix stacked on the opposite end. Furthermore, there is a disulfide-linked dimer of the protein in the asymmetric unit of the crystals. Solution hydrodynamic experiments established that purified rTP0435 is monomeric, but specifically forms the disulfide-stabilized dimer observed in the crystal structure. The data herein, when considered with previous work on TP0435, imply plausible roles for the protein in either ligand binding, treponemal membrane architecture, and/or pathogenesis.

  • Organizational Affiliation

    Department of Biophysics, The University of Texas Southwestern Medical Center, Dallas, Texas, 75390.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
17 kDa lipoprotein
A, B
122Treponema pallidum subsp. pallidum str. NicholsMutation(s): 0 
Gene Names: tpp17TP_0435
Find proteins for P29722 (Treponema pallidum (strain Nichols))
Explore P29722 
Go to UniProtKB:  P29722
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29722
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.235 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.682α = 90
b = 85.682β = 90
c = 85.376γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI056305

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-12-24
    Changes: Database references
  • Version 1.2: 2015-01-14
    Changes: Database references
  • Version 1.3: 2017-09-06
    Changes: Author supporting evidence, Database references, Derived calculations, Other, Source and taxonomy
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Refinement description