Biological Assembly 1  

 3D View: Structure | Electron Density

Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1BC 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 56.26 kDa 
• Atom Count: 3944 
• Residue Count: 511 
• Unique protein chains: 3

3R08

Crystal structure of mouse cd3epsilon in complex with antibody 2C11 Fab

• DOI: 10.2210/pdb3R08/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Cricetulus migratorius
• Expression System: Cricetulus griseus
• Mutation(s): No 


• Deposited: 2011-03-07 Released: 2012-01-25 
• Deposition Author(s): Shore, D.A., Zhu, X., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 4.10 Å
• R-Value Free: 0.277 
• R-Value Work: 0.222 
• R-Value Observed: 0.224 

Literature

T cell receptors are structures capable of initiating signaling in the absence of large conformational rearrangements.

Fernandes, R.A., Shore, D.A., Vuong, M.T., Yu, C., Zhu, X., Pereira-Lopes, S., Brouwer, H., Fennelly, J.A., Jessup, C.M., Evans, E.J., Wilson, I.A., Davis, S.J.

(2012) J Biol Chem 287: 13324-13335

• PubMed: 22262845 
• DOI: 10.1074/jbc.M111.332783
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Native and non-native ligands of the T cell receptor (TCR), including antibodies, have been proposed to induce signaling in T cells via intra- or intersubunit conformational rearrangements within the extracellular regions of TCR complexes. We have investigated whether any signatures can be found for such postulated structural changes during TCR triggering induced by antibodies, using crystallographic and mutagenesis-based approaches. The crystal structure of murine CD3ε complexed with the mitogenic anti-CD3ε antibody 2C11 enabled the first direct structural comparisons of antibody-liganded and unliganded forms of CD3ε from a single species, which revealed that antibody binding does not induce any substantial rearrangements within CD3ε. Saturation mutagenesis of surface-exposed CD3ε residues, coupled with assays of antibody-induced signaling by the mutated complexes, suggests a new configuration for the complex within which CD3ε is highly exposed and reveals that no large new CD3ε interfaces are required to form during antibody-induced signaling. The TCR complex therefore appears to be a structure that is capable of initiating intracellular signaling in T cells without substantial structural rearrangements within or between the component subunits. Our findings raise the possibility that signaling by native ligands might also be initiated in the absence of large structural rearrangements in the receptor.

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Organizational Affiliation: 

Nuffield Department of Clinical Medicine and Medical Research Council Human Immunology Unit, The University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Mouse anti-mouse CD3epsilon antibody 2C11 light chain	L	213	Cricetulus migratorius	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Mouse anti-mouse CD3epsilon antibody 2C11 heavy chain	H	216	Cricetulus migratorius	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
T-cell surface glycoprotein CD3 epsilon chain	E	82	Cricetulus migratorius	Mutation(s): 0  Gene Names: Cd3e
Find proteins for P22646 (Mus musculus) Explore P22646  Go to UniProtKB:  P22646

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 4.10 Å
• R-Value Free: 0.277 
• R-Value Work: 0.222 
• R-Value Observed: 0.224 
• Space Group: I 4₁ 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 263.177	α = 90
b = 263.177	β = 90
c = 263.177	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
BUSTER	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-03-07 
• Released Date: 2012-01-25 
Deposition Author(s): Shore, D.A., Zhu, X., Wilson, I.A.

Revision History 

• Version 1.0: 2012-01-25
  Type: Initial release
  
• Version 1.1: 2013-09-11
  Changes: Database references