6ELU

Structure of Serum Resistance Associated protein from T. b. rhodesiense


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structure of serum resistance-associated protein and its implications for human African trypanosomiasis.

Zoll, S.Lane-Serff, H.Mehmood, S.Schneider, J.Robinson, C.V.Carrington, M.Higgins, M.K.

(2018) Nat Microbiol 3: 295-301

  • DOI: 10.1038/s41564-017-0085-3
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Only two trypanosome subspecies are able to cause human African trypanosomiasis. To establish an infection in human blood, they must overcome the innate immune system by resisting the toxic effects of trypanolytic factor 1 and trypanolytic factor 2 ( ...

    Only two trypanosome subspecies are able to cause human African trypanosomiasis. To establish an infection in human blood, they must overcome the innate immune system by resisting the toxic effects of trypanolytic factor 1 and trypanolytic factor 2 (refs.  1,2 ). These lipoprotein complexes contain an active, pore-forming component, apolipoprotein L1 (ApoL1), that causes trypanosome cell death 3 . One of the two human-infective subspecies, Trypanosoma brucei rhodesiense, differs from non-infective trypanosomes solely by the presence of the serum resistance-associated protein, which binds directly to ApoL1 and blocks its pore-forming capacity 3-5 . Since this interaction is the single critical event that renders T. b. rhodesiense human- infective, detailed structural information that allows identification of binding determinants is crucial to understand immune escape by the parasite. Here, we present the structure of serum resistance-associated protein and reveal the adaptations that occurred as it diverged from other trypanosome surface molecules to neutralize ApoL1. We also present our mapping of residues important for ApoL1 binding, giving molecular insight into this interaction at the heart of human sleeping sickness.


    Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford, UK. matthew.higgins@bioch.ox.ac.uk.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serum resistance associated; VSG proteinA, D, G, J233Trypanosoma brucei rhodesienseMutation(s): 0 
Gene Names: SRA
Find proteins for Q8T309 (Trypanosoma brucei rhodesiense)
Explore Q8T309 
Go to UniProtKB:  Q8T309
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
G10_3 heavy chainB, E, H, K229Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
G10_3 Light chainC, F, I, L217Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.6α = 90
b = 103.55β = 114.58
c = 150.64γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/P001424/1

Revision History 

  • Version 1.0: 2018-01-24
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Database references
  • Version 1.2: 2018-02-28
    Changes: Database references
  • Version 1.3: 2019-10-16
    Changes: Data collection