4I0K

Crystal structure of murine B7-H3 extracellular domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.97 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and T cell inhibition properties of B7 family member, B7-H3.

Vigdorovich, V.Ramagopal, U.A.Lazar-Molnar, E.Sylvestre, E.Lee, J.S.Hofmeyer, K.A.Zang, X.Nathenson, S.G.Almo, S.C.

(2013) Structure 21: 707-717

  • DOI: 10.1016/j.str.2013.03.003

  • PubMed Abstract: 
  • T cell activity is controlled by a combination of antigen-dependent signaling through the T cell receptor and a set of auxiliary signals delivered through antigen-independent interactions, including the recognition of the B7 family of ligands. B7-H3 ...

    T cell activity is controlled by a combination of antigen-dependent signaling through the T cell receptor and a set of auxiliary signals delivered through antigen-independent interactions, including the recognition of the B7 family of ligands. B7-H3 is a recently identified B7 family member that is strongly overexpressed in a range of cancers and correlates with poor prognosis. We report the crystal structure of murine B7-H3 at a 3 Å resolution, which provides a model for the organization of the IgV and IgC domains within the ectodomain. We demonstrate that B7-H3 inhibits T cell proliferation and show that the FG loop of the IgV domain plays a critical role in this function. B7-H3 crystallized as an unusual dimer arising from the exchange of the G strands in the IgV domains of partner molecules. This arrangement, in combination with previous reports, highlights the dynamic nature and plasticity of the immunoglobulin fold.


    Organizational Affiliation

    Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA. vladimir.vigdorovich@gmail.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CD276 antigen
A
222Mus musculusGene Names: Cd276 (B7h3)
Find proteins for Q8VE98 (Mus musculus)
Go to UniProtKB:  Q8VE98
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
MAN
Query on MAN

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Download CCD File 
A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
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: 2.97 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 100.920α = 90.00
b = 100.920β = 90.00
c = 188.180γ = 120.00
Software Package:
Software NamePurpose
CBASSdata collection
PDB_EXTRACTdata extraction
MOSFLMdata reduction
REFMACrefinement
BALBESphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release
  • Version 1.1: 2016-11-16
    Type: Database references