6C74

Crystal Structure of Murine CD300lf in complex with phosphocholine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.36 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for murine norovirus engagement of bile acids and the CD300lf receptor.

Nelson, C.A.Wilen, C.B.Dai, Y.N.Orchard, R.C.Kim, A.S.Stegeman, R.A.Hsieh, L.L.Smith, T.J.Virgin, H.W.Fremont, D.H.

(2018) Proc Natl Acad Sci U S A 115: E9201-E9210

  • DOI: 10.1073/pnas.1805797115
  • Primary Citation of Related Structures:  
    6E48, 6E47, 6C6Q, 6C74, 6CRJ

  • PubMed Abstract: 
  • Murine norovirus (MNoV) is closely related to human norovirus (HNoV), an infectious agent responsible for acute gastroenteritis worldwide. Here we report the X-ray crystal structure of the dimeric MNoV VP1 protruding (P) domain in complex with its cellular receptor CD300lf ...

    Murine norovirus (MNoV) is closely related to human norovirus (HNoV), an infectious agent responsible for acute gastroenteritis worldwide. Here we report the X-ray crystal structure of the dimeric MNoV VP1 protruding (P) domain in complex with its cellular receptor CD300lf. CD300lf binds the P domain with a 2:2 stoichiometry, engaging a cleft between the AB and DE loops of the P2 subdomain at a site that overlaps the epitopes of neutralizing antibodies. We also identify that bile acids are cofactors enhancing MNoV cell-binding and infectivity. Structures of CD300lf-P domain in complex with glycochenodeoxycholic acid (GCDCA) and lithocholic acid (LCA) reveal two bile acid binding sites at the P domain dimer interface distant from receptor binding sites. The structural determinants for receptor and bile acid binding are supported by numerous biophysical assays utilizing interface residue mutations. We find that the monomeric affinity of CD300lf for the P domain is low and is divalent cation dependent. We have also determined the crystal structure of CD300lf in complex with phosphocholine, revealing that MNoV engages its receptor in a manner mimicking host ligands including similar metal coordination. Docking of the cocomplex structures onto a cryo-EM-derived model of MNoV suggests that each virion can make multiple CD300lf engagements, and thus, infection may be driven by the avidity of cell surface clustered CD300lf. These studies identify multiple potential modulators of norovirus infection that may act to regulate the interaction between the viral capsid P domain and its cognate cellular receptor.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CMRF35-like molecule-1 A111Mus musculusMutation(s): 0 
Gene Names: Cd300lfClm1Lmir3
Find proteins for Q6SJQ7 (Mus musculus)
Explore Q6SJQ7 
Go to UniProtKB:  Q6SJQ7
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PC
Query on PC

Download Ideal Coordinates CCD File 
A
PHOSPHOCHOLINE
C5 H15 N O4 P
YHHSONZFOIEMCP-UHFFFAOYSA-O
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.36 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.168 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.64α = 90
b = 40.058β = 90
c = 68.291γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing
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 StatesAI109725
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI127552

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-12
    Type: Initial release
  • Version 1.1: 2018-09-19
    Changes: Data collection, Database references
  • Version 1.2: 2018-10-03
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence