4N7I

Crystal Structure of Intracellular B30.2 Domain of BTN3A1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4015 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.135 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Intracellular B30.2 Domain of Butyrophilin 3A1 Binds Phosphoantigens to Mediate Activation of Human V gamma 9V delta 2 T Cells.

Sandstrom, A.Peigne, C.M.Leger, A.Crooks, J.E.Konczak, F.Gesnel, M.C.Breathnach, R.Bonneville, M.Scotet, E.Adams, E.J.

(2014) Immunity 40: 490-500

  • DOI: 10.1016/j.immuni.2014.03.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In humans, Vγ9Vδ2 T cells detect tumor cells and microbial infections, including Mycobacterium tuberculosis, through recognition of small pyrophosphate containing organic molecules known as phosphoantigens (pAgs). Key to pAg-mediated activation of Vγ ...

    In humans, Vγ9Vδ2 T cells detect tumor cells and microbial infections, including Mycobacterium tuberculosis, through recognition of small pyrophosphate containing organic molecules known as phosphoantigens (pAgs). Key to pAg-mediated activation of Vγ9Vδ2 T cells is the butyrophilin 3A1 (BTN3A1) protein that contains an intracellular B30.2 domain critical to pAg reactivity. Here, we have demonstrated through structural, biophysical, and functional approaches that the intracellular B30.2 domain of BTN3A1 directly binds pAg through a positively charged surface pocket. Charge reversal of pocket residues abrogates binding and Vγ9Vδ2 T cell activation. We have also identified a gain-of-function mutation within this pocket that, when introduced into the B30.2 domain of the nonstimulatory BTN3A3 isoform, transfers pAg binding ability and Vγ9Vδ2 T cell activation. These studies demonstrate that internal sensing of changes in pAg metabolite concentrations by BTN3A1 molecules is a critical step in Vγ9Vδ2 T cell detection of infection and tumorigenesis.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Butyrophilin subfamily 3 member A1
A
190Homo sapiensMutation(s): 0 
Gene Names: BTN3A1 (BTF5)
Find proteins for O00481 (Homo sapiens)
Go to Gene View: BTN3A1
Go to UniProtKB:  O00481
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BME
Query on BME

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Download CCD File 
A
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4015 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.135 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 39.032α = 90.00
b = 44.957β = 90.00
c = 124.813γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-23
    Type: Initial release
  • Version 1.1: 2014-05-14
    Type: Database references