1SY6

Crystal Structure of CD3gammaepsilon Heterodimer in Complex with OKT3 Fab Fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystal structure of the human T cell receptor CD3(epsilon)(gamma) heterodimer complexed to the therapeutic mAb OKT3.

Kjer-Nielsen, L.Dunstone, M.A.Kostenko, L.Ely, L.K.Beddoe, T.Mifsud, N.A.Purcell, A.W.Brooks, A.G.McCluskey, J.Rossjohn, J.

(2004) Proc.Natl.Acad.Sci.USA 101: 7675-7680

  • DOI: 10.1073/pnas.0402295101

  • PubMed Abstract: 
  • The CD3 epsilon gamma heterodimer is essential for expression and function of the T cell receptor. The crystal structure of the human CD3 epsilon gamma heterodimer is described to 2.1-A resolution complexed with OKT3, a therapeutic mAb that not only ...

    The CD3 epsilon gamma heterodimer is essential for expression and function of the T cell receptor. The crystal structure of the human CD3 epsilon gamma heterodimer is described to 2.1-A resolution complexed with OKT3, a therapeutic mAb that not only activates and tolerizes mature T cells but also induces regulatory T cells. The mode of CD3 epsilon gamma dimerization provides a general structural basis for CD3 assembly and maps candidate T cell antigen receptor docking sites, including a duplicated linear region rich in acidic residues that is unique to human CD3 epsilon. OKT3 binds to an atypically small area of CD3 epsilon and has a low affinity for the isolated CD3 epsilon gamma heterodimer. The structure of the OKT3/CD3 epsilon gamma complex has implications for T cell signaling and therapeutic design.


    Organizational Affiliation

    Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria 3010, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OKT3 Fab light chain
L
213N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
OKT3 Fab heavy chain
H
219Mus musculusMutation(s): 0 
Gene Names: Igh
Find proteins for Q6PJA7 (Mus musculus)
Go to UniProtKB:  Q6PJA7
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
T-cell surface glycoprotein CD3 gamma/epsilon chain
A
204Homo sapiensMutation(s): 0 
Gene Names: CD3E (T3E), CD3G (T3G)
Find proteins for P07766 (Homo sapiens)
Go to Gene View: CD3E
Go to UniProtKB:  P07766
Find proteins for P09693 (Homo sapiens)
Go to Gene View: CD3G
Go to UniProtKB:  P09693
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 67.702α = 90.00
b = 55.770β = 100.85
c = 96.050γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-08-02
    Type: Refinement description, Source and taxonomy
  • Version 1.4: 2018-04-04
    Type: Data collection