Macromolecule Content

• Total Structure Weight: 10.27 kDa 
• Atom Count: 723 
• Modelled Residue Count: 86 
• Deposited Residue Count: 86 
• Unique protein chains: 1

2JXB

Structure of CD3epsilon-Nck2 first SH3 domain complex

• DOI: 10.2210/pdb2JXB/pdb

• Classification: Signaling protein complex
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-11-09 Released: 2008-09-23 
• Deposition Author(s): Takeuchi, K., Yang, H., Ng, E., Park, S., Sun, Z.J., Reinherz, E.L., Wagner, G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural and functional evidence that Nck interaction with CD3epsilon regulates T-cell receptor activity.

Takeuchi, K., Yang, H., Ng, E., Park, S.Y., Sun, Z.Y., Reinherz, E.L., Wagner, G.

(2008) J Mol Biol 380: 704-716

• PubMed: 18555270 
• DOI: 10.1016/j.jmb.2008.05.037
• Primary Citation of Related Structures:  
  2JXB


• PubMed Abstract: 
  

Recruitment of signaling molecules to the cytoplasmic domains of the CD3 subunits of the T-cell receptor (TCR) is crucial for early T-cell activation. These transient associations either do or do not require tyrosine phosphorylation of CD3 immune tyrosine activation motifs (ITAMs). Here we show that the non-ITAM-requiring adaptor protein Nck forms a complex with an atypical PxxDY motif of the CD3epsilon tail, which encompasses Tyr166 within the ITAM and a TCR endocytosis signal. As suggested by the structure of the complex, we find that Nck binding inhibits phosphorylation of the CD3epsilon ITAM by Fyn and Lck kinases in vitro. Moreover, the CD3epsilon-Nck interaction downregulates TCR surface expression upon physiological stimulation in mouse primary lymph node cells. This indicates that Nck performs an important regulatory function in T lymphocytes by inhibiting ITAM phosphorylation and/or removing cell surface TCR via CD3epsilon interaction.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
T-cell surface glycoprotein CD3 epsilon chain, Cytoplasmic protein NCK2	A	86	Homo sapiens	Mutation(s): 0  Gene Names: CD3E, NCK2, GRB4
Find proteins for O43639 (Homo sapiens) Explore O43639  Go to UniProtKB:  O43639
NIH Common Fund Data Resources
PHAROS:  O43639 GTEx:  ENSG00000071051

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2JXB Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-11-09 
• Released Date: 2008-09-23 
Deposition Author(s): Takeuchi, K., Yang, H., Ng, E., Park, S., Sun, Z.J., Reinherz, E.L., Wagner, G.

Revision History  

• Version 1.0: 2008-09-23
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance