5JDO

T. congolense haptoglobin-haemoglobin receptor in complex with haemoglobin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.7554/eLife.13044

  • 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 complex ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Haptoglobin-haemoglobin receptor
A
249Trypanosoma congolense (strain IL3000)N/A
Find proteins for G0UVW6 (Trypanosoma congolense (strain IL3000))
Go to UniProtKB:  G0UVW6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Haptoglobin-haemoglobin receptor
B
245Trypanosoma congolense (strain IL3000)N/A
Find proteins for G0UVW6 (Trypanosoma congolense (strain IL3000))
Go to UniProtKB:  G0UVW6
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit alpha
C
141Homo sapiensGene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens)
Go to Gene View: HBA1 HBA2
Go to UniProtKB:  P69905
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit beta
D
145Homo sapiensGene Names: HBB
Find proteins for P68871 (Homo sapiens)
Go to Gene View: HBB
Go to UniProtKB:  P68871
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit alpha
E
140Homo sapiensGene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens)
Go to Gene View: HBA1 HBA2
Go to UniProtKB:  P69905
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit beta
F
144Homo sapiensGene Names: HBB
Find proteins for P68871 (Homo sapiens)
Go to Gene View: HBB
Go to UniProtKB:  P68871
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OXY
Query on OXY

Download SDF File 
Download CCD File 
C, D, E, F
OXYGEN MOLECULE
O2
MYMOFIZGZYHOMD-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
C, D, E, F
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.204 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.750α = 90.00
b = 127.300β = 90.00
c = 172.420γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
BUSTERrefinement
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


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

Revision History 

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence