1YJD

Crystal structure of human CD28 in complex with the Fab fragment of a mitogenic antibody (5.11A1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a soluble CD28-Fab complex

Evans, E.J.Esnouf, R.M.Manso-Sancho, R.Gilbert, R.J.C.James, J.R.Yu, C.Fennelly, J.A.Vowles, C.Hanke, T.Walse, B.Hunig, T.Sorensen, P.Stuart, D.I.Davis, S.J.

(2005) Nat.Immunol. 6: 271-279

  • DOI: 10.1038/ni1170

  • PubMed Abstract: 
  • Naive T cell activation requires signaling by the T cell receptor and by nonclonotypic cell surface receptors. The most important costimulatory protein is the monovalent homodimer CD28, which interacts with CD80 and CD86 expressed on antigen-presenti ...

    Naive T cell activation requires signaling by the T cell receptor and by nonclonotypic cell surface receptors. The most important costimulatory protein is the monovalent homodimer CD28, which interacts with CD80 and CD86 expressed on antigen-presenting cells. Here we present the crystal structure of a soluble form of CD28 in complex with the Fab fragment of a mitogenic antibody. Structural comparisons redefine the evolutionary relationships of CD28-related proteins, antigen receptors and adhesion molecules and account for the distinct ligand-binding and stoichiometric properties of CD28 and the related, inhibitory homodimer CTLA-4. Cryo-electron microscopy-based comparisons of complexes of CD28 with mitogenic and nonmitogenic antibodies place new constraints on models of antibody-induced receptor triggering. This work completes the initial structural characterization of the CD28-CTLA-4-CD80-CD86 signaling system.


    Organizational Affiliation

    Nuffield Department of Clinical Medicine, The University of Oxford, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fab fragment of 5.11A1 antibody light chain
L
212N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab fragment of 5.11A1 antibody heavy chain
H
222N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
T-cell-specific surface glycoprotein CD28
C
140Homo sapiensMutation(s): 0 
Gene Names: CD28
Find proteins for P10747 (Homo sapiens)
Go to Gene View: CD28
Go to UniProtKB:  P10747
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
C
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 191.219α = 90.00
b = 47.417β = 94.45
c = 71.842γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
CNSrefinement
X-PLORphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-02-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance