Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A3B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 31.37 kDa 
• Atom Count: 1926 
• Residue Count: 260 
• Unique protein chains: 2

3M0A

Crystal structure of TRAF2:cIAP2 complex

• DOI: 10.2210/pdb3M0A/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-03-02 Released: 2010-04-28 
• Deposition Author(s): Kabaleeswaran, V., Wu, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.61 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 

Literature

Crystal structures of the TRAF2: cIAP2 and the TRAF1: TRAF2: cIAP2 complexes: affinity, specificity, and regulation.

Zheng, C., Kabaleeswaran, V., Wang, Y., Cheng, G., Wu, H.

(2010) Mol Cell 38: 101-113

• PubMed: 20385093 
• DOI: 10.1016/j.molcel.2010.03.009
• Primary Citation of Related Structures:  
  3M0A, 3M0D, 3M06


• PubMed Abstract: 
  

TRAF1/2 and cIAP1/2 are members of the TNF receptor-associated factor (TRAF) and the inhibitor of apoptosis (IAP) families, respectively. They are critical for canonical and noncanonical NF-kappaB signaling pathways. Here, we report the crystal structures of the TRAF2: cIAP2 and the TRAF1: TRAF2: cIAP2 complexes. A TRAF2 trimer interacts with one cIAP2 both in the crystal and in solution. Two chains of the TRAF2 trimer directly contact cIAP2, and key residues at the interface are confirmed by mutagenesis. TRAF1 and TRAF2 preferentially form the TRAF1: (TRAF2)(2) heterotrimer, which interacts with cIAP2 more strongly than TRAF2 alone. In contrast, TRAF1 alone interacts very weakly with cIAP2. Surprisingly, TRAF1 and one chain of TRAF2 in the TRAF1: (TRAF2)(2): cIAP2 ternary complex mediate interaction with cIAP2. Because TRAF1 is upregulated by many stimuli, it may modulate the interaction of TRAF2 with cIAP1/2, which explains regulatory roles of TRAF1 in TNF signaling.

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Organizational Affiliation: 

Weill Medical College, Cornell University, New York, NY 10021, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TNF receptor-associated factor 2	A, B, C	66	Homo sapiens	Mutation(s): 0  Gene Names: TRAF2, TRAP3 EC: 2.3.2.27
Find proteins for Q12933 (Homo sapiens) Explore Q12933  Go to UniProtKB:  Q12933
NIH Common Fund Data Resources
PHAROS  Q12933 GTEx  ENSG00000127191

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Baculoviral IAP repeat-containing protein 3	D	75	Homo sapiens	Mutation(s): 0  Gene Names: BIRC3, API2, IAP1, MIHC, RNF49 EC: 2.3.2.27
Find proteins for Q13489 (Homo sapiens) Explore Q13489  Go to UniProtKB:  Q13489
NIH Common Fund Data Resources
PHAROS  Q13489 GTEx  ENSG00000023445

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	D	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.61 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 
• Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 92.123	α = 90
b = 92.123	β = 90
c = 85.971	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-03-02 
• Released Date: 2010-04-28 
Deposition Author(s): Kabaleeswaran, V., Wu, H.

Revision History 

• Version 1.0: 2010-04-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2015-07-29
  Changes: Structure summary