4YM4

Truncated Human TIFA in complex with its Thr9 phosphorylated N-terminal peptide 1-15


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.12 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Uncovering the Mechanism of Forkhead-Associated Domain-Mediated TIFA Oligomerization That Plays a Central Role in Immune Responses.

Weng, J.H.Hsieh, Y.C.Huang, C.C.Wei, T.Y.Lim, L.H.Chen, Y.H.Ho, M.R.Wang, I.Huang, K.F.Chen, C.J.Tsai, M.D.

(2015) Biochemistry 54: 6219-6229

  • DOI: 10.1021/acs.biochem.5b00500
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Forkhead-associated (FHA) domain is the only signaling domain that recognizes phosphothreonine (pThr) specifically. TRAF-interacting protein with an FHA domain (TIFA) was shown to be involved in immune responses by binding with TRAF2 and TRAF6. We re ...

    Forkhead-associated (FHA) domain is the only signaling domain that recognizes phosphothreonine (pThr) specifically. TRAF-interacting protein with an FHA domain (TIFA) was shown to be involved in immune responses by binding with TRAF2 and TRAF6. We recently reported that TIFA is a dimer in solution and that, upon stimulation by TNF-α, TIFA is phosphorylated at Thr9, which triggers TIFA oligomerization via pThr9-FHA domain binding and activates nuclear factor κB (NF-κB). However, the structural mechanism for the functionally important TIFA oligomerization remains to be established. While FHA domain-pThr binding is known to mediate protein dimerization, its role in oligomerization has not been demonstrated at the structural level. Here we report the crystal structures of TIFA (residues 1-150, with the unstructured C-terminal tail truncated) and its complex with the N-terminal pThr9 peptide (residues 1-15), which show unique features in the FHA structure (intrinsic dimer and extra β-strand) and in its interaction with the pThr peptide (with residues preceding rather than following pThr). These structural features support previous and additional functional analyses. Furthermore, the structure of the complex suggests that the pThr9-FHA domain interaction can occur only between different sets of dimers rather than between the two protomers within a dimer, providing the structural mechanism for TIFA oligomerization. Our results uncover the mechanism of FHA domain-mediated oligomerization in a key step of immune responses and expand the paradigm of FHA domain structure and function.


    Organizational Affiliation

    Institute of Biological Chemistry, Academia Sinica , Taipei, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRAF-interacting protein with FHA domain-containing protein A
A
141Homo sapiensMutation(s): 0 
Gene Names: TIFA (T2BP)
Find proteins for Q96CG3 (Homo sapiens)
Go to Gene View: TIFA
Go to UniProtKB:  Q96CG3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRAF-interacting protein with FHA domain-containing protein A
B
12Homo sapiensMutation(s): 0 
Gene Names: TIFA (T2BP)
Find proteins for Q96CG3 (Homo sapiens)
Go to Gene View: TIFA
Go to UniProtKB:  Q96CG3
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
TPO
Query on TPO
B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.12 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.213 
  • Space Group: P 42 3 2
Unit Cell:
Length (Å)Angle (°)
a = 113.205α = 90.00
b = 113.205β = 90.00
c = 113.205γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PDB_EXTRACTdata extraction
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Academia SinicaTaiwan--
National Health Research InstitutesTaiwan--

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-10-28
    Type: Database references