2M1W

TICAM-2 TIR domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structures and interface mapping of the TIR domain-containing adaptor molecules involved in interferon signaling.

Enokizono, Y.Kumeta, H.Funami, K.Horiuchi, M.Sarmiento, J.Yamashita, K.Standley, D.M.Matsumoto, M.Seya, T.Inagaki, F.

(2013) Proc.Natl.Acad.Sci.USA 110: 19908-19913

  • DOI: 10.1073/pnas.1222811110
  • Primary Citation of Related Structures:  2M1X

  • PubMed Abstract: 
  • Homotypic and heterotypic interactions between Toll/interleukin-1 receptor (TIR) domains in Toll-like receptors (TLRs) and downstream adaptors are essential to evoke innate immune responses. However, such oligomerization properties present intrinsic ...

    Homotypic and heterotypic interactions between Toll/interleukin-1 receptor (TIR) domains in Toll-like receptors (TLRs) and downstream adaptors are essential to evoke innate immune responses. However, such oligomerization properties present intrinsic difficulties in structural studies of TIR domains. Here, using BB-loop mutations that disrupt homotypic interactions, we determined the structures of the monomeric TIR domain-containing adaptor molecule (TICAM)-1 and TICAM-2 TIR domains. Docking of the monomeric structures, together with yeast two hybrid-based mutagenesis assays, reveals that the homotypic interaction between TICAM-2 TIR is indispensable to present a scaffold for recruiting the monomeric moiety of the TICAM-1 TIR dimer. This result proposes a unique idea that oligomerization of upstream TIR domains is crucial for binding of downstream TIR domains. Furthermore, the bivalent nature of each TIR domain dimer can generate a large signaling complex under the activated TLRs, which would recruit downstream signaling molecules efficiently. This model is consistent with previous reports that BB-loop mutants completely abrogate downstream signaling.


    Organizational Affiliation

    Department of Structural Biology, Faculty of Advanced Life Science, Hokkaido University, N-21, W-11, Kita-ku, Sapporo 001-0021, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TIR domain-containing adapter molecule 2
A
166Homo sapiensGene Names: TICAM2 (TIRAP3, TIRP, TRAM)
Find proteins for Q86XR7 (Homo sapiens)
Go to Gene View: TICAM2
Go to UniProtKB:  Q86XR7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-15
    Type: Initial release