4XT3

Structure of a viral GPCR bound to human chemokine CX3CL1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.283 
  • R-Value Observed: 0.288 

wwPDB Validation 3D Report Full Report



Literature

Structural biology. Structural basis for chemokine recognition and activation of a viral G protein-coupled receptor.

Burg, J.S.Ingram, J.R.Venkatakrishnan, A.J.Jude, K.M.Dukkipati, A.Feinberg, E.N.Angelini, A.Waghray, D.Dror, R.O.Ploegh, H.L.Garcia, K.C.

(2015) Science 347: 1113-1117

  • DOI: 10.1126/science.aaa5026
  • Primary Citation of Related Structures:  
    4XT1, 4XT3

  • PubMed Abstract: 
  • Chemokines are small proteins that function as immune modulators through activation of chemokine G protein-coupled receptors (GPCRs). Several viruses also encode chemokines and chemokine receptors to subvert the host immune response. How protein liga ...

    Chemokines are small proteins that function as immune modulators through activation of chemokine G protein-coupled receptors (GPCRs). Several viruses also encode chemokines and chemokine receptors to subvert the host immune response. How protein ligands activate GPCRs remains unknown. We report the crystal structure at 2.9 angstrom resolution of the human cytomegalovirus GPCR US28 in complex with the chemokine domain of human CX3CL1 (fractalkine). The globular body of CX3CL1 is perched on top of the US28 extracellular vestibule, whereas its amino terminus projects into the central core of US28. The transmembrane helices of US28 adopt an active-state-like conformation. Atomic-level simulations suggest that the agonist-independent activity of US28 may be due to an amino acid network evolved in the viral GPCR to destabilize the receptor's inactive state.


    Organizational Affiliation

    Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. kcgarcia@stanford.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G-protein coupled receptor homolog US28A362CytomegalovirusMutation(s): 0 
Find proteins for P69332 (Human cytomegalovirus (strain AD169))
Explore P69332 
Go to UniProtKB:  P69332
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FractalkineB91Homo sapiensMutation(s): 0 
Gene Names: CX3CL1FKNNTTSCYD1A-152E5.2
Find proteins for P78423 (Homo sapiens)
Explore P78423 
Go to UniProtKB:  P78423
NIH Common Fund Data Resources
PHAROS  P78423
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
3 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
UNL
Query on UNL

Download CCD File 
A
Unknown ligand
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
BL-PEPTIDE LINKINGC5 H7 N O3GLN
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 3
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900017
Query on PRD_900017
Ctriacetyl-beta-chitotrioseOligosaccharide /  Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.283 
  • R-Value Observed: 0.288 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.9α = 90
b = 192.7β = 90
c = 94.4γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-04
    Type: Initial release
  • Version 1.1: 2015-03-18
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Polymer sequence, Source and taxonomy, Structure summary