Structure of bovine CD46 ectodomain (SCR 1-4)

Experimental Data Snapshot

  • Resolution: 2.84 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.254 

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Structure of Bovine CD46 Ectodomain.

Aitkenhead, H.Stuart, D.I.El Omari, K.

(2023) Viruses 15

  • DOI: https://doi.org/10.3390/v15071424
  • Primary Citation of Related Structures:  
    8CI3, 8CJV

  • PubMed Abstract: 

    CD46, or membrane cofactor protein, is a type-one transmembrane protein from the complement regulatory protein family. Alongside its role in complement activation, CD46 is involved in many other processes, from T-cell activation to reproduction. It is also referred to as a pathogen magnet, because it is used as a receptor by multiple bacteria and viruses. Bovine CD46 (bovCD46) in particular is involved in bovine viral diarrhoea virus entry, an economically important disease in cattle industries. This study presents the X-ray crystallographic structure of the extracellular region of bovCD46, revealing a four-short-consensus-repeat (SCR) structure similar to that in human CD46. SCR1-3 are arranged linearly, while SCR 4 has a reduced interface angle, resulting in a hockey stick-like appearance. The structure also reveals the bovine viral diarrhoea virus interaction site in SCR1, which is likely to confer pestivirus specificity for their target host, CD46. Insights gained from the structural information on pestivirus receptors, such as CD46, could offer valuable guidance for future control strategies.

  • Organizational Affiliation

    Diamond Light Source (United Kingdom), Harwell Science and Innovation Campus, Didcot OX110DE, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Membrane cofactor protein
A, B
289Bos taurusMutation(s): 0 
Gene Names: CD46MCP
Find proteins for Q6VE48 (Bos taurus)
Explore Q6VE48 
Go to UniProtKB:  Q6VE48
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6VE48
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.84 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.254 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.731α = 90
b = 129.731β = 90
c = 120.193γ = 90
Software Package:
Software NamePurpose
autoPROCdata reduction
STARANISOdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/M011224/1

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-12
    Type: Initial release
  • Version 1.1: 2023-08-09
    Changes: Database references