Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.70 kDa 
• Atom Count: 679 
• Residue Count: 95 
• Unique protein chains: 2

2L35

Structure of the DAP12-NKG2C transmembrane heterotrimer

• DOI: 10.2210/pdb2L35/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-09-06 Released: 2010-11-03 
• Deposition Author(s): Call, M.E., Wucherpfennig, K.W., Chou, J.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 

Literature

The structural basis for intramembrane assembly of an activating immunoreceptor complex.

Call, M.E., Wucherpfennig, K.W., Chou, J.J.

(2010) Nat Immunol 11: 1023-1029

• PubMed: 20890284 
• DOI: 10.1038/ni.1943
• Primary Citation of Related Structures:  
  2L35, 2L34


• PubMed Abstract: 
  

Many receptors that activate cells of the immune system are multisubunit membrane protein complexes in which ligand recognition and signaling functions are contributed by separate protein modules. Receptors and signaling subunits assemble through contacts among basic and acidic residues in their transmembrane domains to form the functional complexes. Here we report the nuclear magnetic resonance (NMR) structure of the membrane-embedded, heterotrimeric assembly formed by association of the DAP12 signaling module with the natural killer (NK) cell-activating receptor NKG2C. The main intramembrane contact site is formed by a complex electrostatic network involving five hydrophilic transmembrane residues. Functional mutagenesis demonstrated that similar polar intramembrane motifs are also important for assembly of the NK cell-activating NKG2D-DAP10 complex and the T cell antigen receptor (TCR)-invariant signaling protein CD3 complex. This structural motif therefore lies at the core of the molecular organization of many activating immunoreceptors.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DAP12-NKG2C_TM	A	63	Homo sapiens	Mutation(s): 0  Gene Names: TYROBP, DAP12, KARAP, KLRC2, NKG2C
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Immune Receptors	Protein:  DAP12 dimeric signaling domain in complex with activating receptor NKG2C
Find proteins for P26717 (Homo sapiens) Explore P26717  Go to UniProtKB:  P26717
NIH Common Fund Data Resources
PHAROS  P26717 GTEx  ENSG00000205809
Find proteins for O43914 (Homo sapiens) Explore O43914  Go to UniProtKB:  O43914
NIH Common Fund Data Resources
PHAROS  O43914 GTEx  ENSG00000011600

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TYRO protein tyrosine kinase-binding protein	B	32	Homo sapiens	Mutation(s): 0  Gene Names: TYROBP, DAP12, KARAP
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Immune Receptors	Protein:  DAP12 dimeric signaling domain in complex with activating receptor NKG2C
Find proteins for O43914 (Homo sapiens) Explore O43914  Go to UniProtKB:  O43914
NIH Common Fund Data Resources
PHAROS  O43914 GTEx  ENSG00000011600

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2L35 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-09-06 
• Released Date: 2010-11-03 
Deposition Author(s): Call, M.E., Wucherpfennig, K.W., Chou, J.J.

Revision History 

• Version 1.0: 2010-11-03
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance