1ZMS

LMP1 Protein binds to TRAF3 as a structural CD40


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

LMP1 protein from the Epstein Barr virus is a structural CD40 decoy in B lymphocytes fro binding to TRAF3

Wu, S.D.Xie, P.Welsh, K.Li, C.Ni, C.-Z.Zhu, X.Reed, J.C.Satterthwait, A.C.Bishop, G.A.Ely, K.R.

(2005) J.Biol.Chem. 39: 33620-33626

  • DOI: 10.1074/jbc.M502511200

  • PubMed Abstract: 
  • Epstein-Barr virus is a human herpesvirus that causes infectious mononucleosis and lymphoproliferative malignancies. LMP1 (latent membrane protein-1), which is encoded by this virus and which is essential for transformation of B lymphocytes, acts as ...

    Epstein-Barr virus is a human herpesvirus that causes infectious mononucleosis and lymphoproliferative malignancies. LMP1 (latent membrane protein-1), which is encoded by this virus and which is essential for transformation of B lymphocytes, acts as a constitutively active mimic of the tumor necrosis factor receptor (TNFR) CD40. LMP1 is an integral membrane protein containing six transmembrane segments and a cytoplasmic domain at the C terminus that binds to intracellular TNFR-associated factors (TRAFs). TRAFs are intracellular co-inducers of downstream signaling from CD40 and other TNFRs, and TRAF3 is required for activation of B lymphocytes by LMP1. Cytoplasmic C-terminal activation region 1 of LMP1 bears a motif (PQQAT) that conforms to the TRAF recognition motif PVQET in CD40. In this study, we report the crystal structure of this portion of LMP1 C-terminal activation region-1 (204PQQATDD210) bound in complex with TRAF3. The PQQAT motif is bound in the same binding crevice on TRAF3 where CD40 is bound, providing a molecular mechanism for LMP1 to act as a CD40 decoy for TRAF3. The LMP1 motif is presented in the TRAF3 crevice as a close structural mimic of the PVQET motif in CD40, and the intermolecular contacts are similar. However, the viral protein makes a unique contact: a hydrogen bond network formed between Asp210 in LMP1 and Tyr395 and Arg393 in TRAF3. This intermolecular contact is not made in the CD40-TRAF3 complex. The additional hydrogen bonds may stabilize the complex and strengthen the binding to permit LMP1 to compete with CD40 for binding to the TRAF3 crevice, influencing downstream signaling to B lymphocytes and contributing to dysregulated signaling by LMP1.


    Organizational Affiliation

    Cancer Center, The Burnham Institute, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TNF receptor associated factor 3
A
192Homo sapiensMutation(s): 0 
Gene Names: TRAF3 (CAP1, CRAF1)
EC: 2.3.2.27
Find proteins for Q13114 (Homo sapiens)
Go to Gene View: TRAF3
Go to UniProtKB:  Q13114
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Latent membrane protein 1
B
8Epstein-Barr virus (strain Raji)Mutation(s): 0 
Gene Names: LMP1
Find proteins for P13198 (Epstein-Barr virus (strain Raji))
Go to UniProtKB:  P13198
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.206 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 83.670α = 90.00
b = 83.670β = 90.00
c = 77.960γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance