5JDO

T. congolense haptoglobin-haemoglobin receptor in complex with haemoglobin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Evolutionary diversification of the trypanosome haptoglobin-haemoglobin receptor from an ancestral haemoglobin receptor.

Lane-Serff, H.MacGregor, P.Peacock, L.Macleod, O.J.Kay, C.Gibson, W.Higgins, M.K.Carrington, M.

(2016) Elife 5

  • DOI: https://doi.org/10.7554/eLife.13044
  • Primary Citation of Related Structures:  
    5JDO

  • PubMed Abstract: 

    The haptoglobin-haemoglobin receptor of the African trypanosome species, Trypanosoma brucei, is expressed when the parasite is in the bloodstream of the mammalian host, allowing it to acquire haem through the uptake of haptoglobin-haemoglobin complexes. Here we show that in Trypanosoma congolense this receptor is instead expressed in the epimastigote developmental stage that occurs in the tsetse fly, where it acts as a haemoglobin receptor. We also present the structure of the T. congolense receptor in complex with haemoglobin. This allows us to propose an evolutionary history for this receptor, charting the structural and cellular changes that took place as it adapted from a role in the insect to a new role in the mammalian host.


  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Haptoglobin-haemoglobin receptor249Trypanosoma congolenseMutation(s): 0 
Gene Names: TCIL3000_10_2930
UniProt
Find proteins for G0UVW6 (Trypanosoma congolense (strain IL3000))
Explore G0UVW6 
Go to UniProtKB:  G0UVW6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG0UVW6
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Haptoglobin-haemoglobin receptor245Trypanosoma congolenseMutation(s): 0 
Gene Names: TCIL3000_10_2930
UniProt
Find proteins for G0UVW6 (Trypanosoma congolense (strain IL3000))
Explore G0UVW6 
Go to UniProtKB:  G0UVW6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG0UVW6
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit alpha141Homo sapiensMutation(s): 0 
Gene Names: HBA1HBA2
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit beta145Homo sapiensMutation(s): 0 
Gene Names: HBB
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
GTEx:  ENSG00000244734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit alpha140Homo sapiensMutation(s): 0 
Gene Names: HBA1HBA2
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit beta144Homo sapiensMutation(s): 0 
Gene Names: HBB
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
GTEx:  ENSG00000244734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.75α = 90
b = 127.3β = 90
c = 172.42γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomML/L008246

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Author supporting evidence
  • Version 1.2: 2019-10-16
    Changes: Data collection
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description