Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 10.74 kDa 
• Atom Count: 762 
• Residue Count: 84 
• Unique protein chains: 1

2NA6

Transmembrane domain of mouse Fas/CD95 death receptor

• DOI: 10.2210/pdb2NA6/pdb
• BMRB: 25929

• Classification: APOPTOSIS
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-12-21 Released: 2016-01-27 
• Deposition Author(s): Fu, Q., Chou, J.J., Wu, H., Fu, T., Membrane Protein Structures by Solution NMR (MPSbyNMR)

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Experimental Data Snapshot

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

Literature

Structural Basis and Functional Role of Intramembrane Trimerization of the Fas/CD95 Death Receptor.

Fu, Q., Fu, T.M., Cruz, A.C., Sengupta, P., Thomas, S.K., Wang, S., Siegel, R.M., Wu, H., Chou, J.J.

(2016) Mol Cell 61: 602-613

• PubMed: 26853147 
• DOI: 10.1016/j.molcel.2016.01.009
• Primary Citation of Related Structures:  
  2NA7, 2NA6


• PubMed Abstract: 
  

Fas (CD95, Apo-1, or TNFRSF6) is a prototypical apoptosis-inducing death receptor in the tumor necrosis factor receptor (TNFR) superfamily. While the extracellular domains of TNFRs form trimeric complexes with their ligands and the intracellular domains engage in higher-order oligomerization, the role of the transmembrane (TM) domains is unknown. We determined the NMR structures of mouse and human Fas TM domains in bicelles that mimic lipid bilayers. Surprisingly, these domains use proline motifs to create optimal packing in homotrimer assembly distinct from classical trimeric coiled-coils in solution. Cancer-associated and structure-based mutations in Fas TM disrupt trimerization in vitro and reduce apoptosis induction in vivo, indicating the essential role of intramembrane trimerization in receptor activity. Our data suggest that the structures represent the signaling-active conformation of Fas TM, which appears to be different from the pre-ligand conformation. Analysis of other TNFR sequences suggests proline-containing sequences as common motifs for receptor TM trimerization.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tumor necrosis factor receptor superfamily member 6	A, B, C	28	Mus musculus	Mutation(s): 0  Gene Names: Fas, Apt1, Tnfrsf6
Find proteins for P25446 (Mus musculus) Explore P25446  Go to UniProtKB:  P25446

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2NA6 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-12-21 
• Released Date: 2016-01-27 
Deposition Author(s): Fu, Q., Chou, J.J., Wu, H., Fu, T., Membrane Protein Structures by Solution NMR (MPSbyNMR)

Revision History 

• Version 1.0: 2016-01-27
  Type: Initial release
  
• Version 1.1: 2016-03-02
  Changes: Database references