1DR9

CRYSTAL STRUCTURE OF A SOLUBLE FORM OF B7-1 (CD80)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and dimerization of a soluble form of B7-1.

Ikemizu, S.Gilbert, R.J.Fennelly, J.A.Collins, A.V.Harlos, K.Jones, E.Y.Stuart, D.I.Davis, S.J.

(2000) Immunity 12: 51-60


  • PubMed Abstract: 
  • B7-1 (CD80) and B7-2 (CD86) are glycoproteins expressed on antigen-presenting cells. The binding of these molecules to the T cell homodimers CD28 and CTLA-4 (CD152) generates costimulatory and inhibitory signals in T cells, respectively. The crystal ...

    B7-1 (CD80) and B7-2 (CD86) are glycoproteins expressed on antigen-presenting cells. The binding of these molecules to the T cell homodimers CD28 and CTLA-4 (CD152) generates costimulatory and inhibitory signals in T cells, respectively. The crystal structure of the extracellular region of B7-1 (sB7-1), solved to 3 A resolution, consists of a novel combination of two Ig-like domains, one characteristic of adhesion molecules and the other previously seen only in antigen receptors. In the crystal lattice, sB7-1 unexpectedly forms parallel, 2-fold rotationally symmetric homodimers. Analytical ultracentrifugation reveals that sB7-1 also dimerizes in solution. The structural data suggest a mechanism whereby the avidity-enhanced binding of B7-1 and CTLA-4 homodimers, along with the relatively high affinity of these interactions, favors the formation of very stable inhibitory signaling complexes.


    Organizational Affiliation

    Division of Structural Biology, Wellcome Trust Centre for Human Genetics, The University of Oxford, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T LYMPHOCYTE ACTIVATION ANTIGEN
A
201Homo sapiensGene Names: CD80 (CD28LG, CD28LG1, LAB7)
Find proteins for P33681 (Homo sapiens)
Go to Gene View: CD80
Go to UniProtKB:  P33681
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.238 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 57.280α = 90.00
b = 57.280β = 90.00
c = 298.930γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
SOLVEphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-01-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance