Macromolecule Content

• Total Structure Weight: 7.51 kDa 
• Atom Count: 530 
• Modelled Residue Count: 66 
• Deposited Residue Count: 66 
• Unique protein chains: 1

2HAC

Structure of Zeta-Zeta Transmembrane Dimer

• DOI: 10.2210/pdb2HAC/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-06-12 Released: 2006-10-31 
• Deposition Author(s): Chou, J.J., Wucherpfennig, K.W., Schnell, J.R., Call, M.E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 

Literature

The structure of the zetazeta transmembrane dimer reveals features essential for its assembly with the T cell receptor.

Call, M.E., Schnell, J.R., Xu, C., Lutz, R.A., Chou, J.J., Wucherpfennig, K.W.

(2006) Cell 127: 355-368

• PubMed: 17055436 
• DOI: 10.1016/j.cell.2006.08.044
• Primary Citation of Related Structures:  
  2HAC


• PubMed Abstract: 
  

The T cell receptor (TCR) alphabeta heterodimer communicates ligand binding to the cell interior via noncovalently associated CD3gammaepsilon, CD3deltaepsilon, and zetazeta dimers. While structures of extracellular components of the TCR-CD3 complex are known, the transmembrane (TM) domains that mediate assembly have eluded structural characterization. Incorporation of the zetazeta signaling module is known to require one basic TCRalpha and two zetazeta aspartic acid TM residues. We report the NMR structure of the zetazeta(TM) dimer, a left-handed coiled coil with substantial polar contacts. Mutagenesis experiments demonstrate that three polar positions are critical for zetazeta dimerization and assembly with TCR. The two aspartic acids create a single structural unit at the zetazeta interface stabilized by extensive hydrogen bonding, and there is evidence for a structural water molecule (or molecules) within close proximity. This structural unit, representing only the second transmembrane dimer interface solved to date, serves as a paradigm for the assembly of all modules involved in TCR signaling.

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Organizational Affiliation: 

Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
T-cell surface glycoprotein CD3 zeta chain	A, B	33	Homo sapiens	Mutation(s): 1  Gene Names: CD3Z, T3Z, TCRZ, CD247
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Immune Receptors	Protein:  Transmembrane ζ-ζ dimer of the TCR-CD3 complex
Find proteins for P20963 (Homo sapiens) Explore P20963  Go to UniProtKB:  P20963
NIH Common Fund Data Resources
PHAROS:  P20963 GTEx:  ENSG00000198821

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2HAC Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-12 
• Released Date: 2006-10-31 
Deposition Author(s): Chou, J.J., Wucherpfennig, K.W., Schnell, J.R., Call, M.E.

Revision History  

• Version 1.0: 2006-10-31
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance