2LWE

Solution structure of mutant (T170E) second CARD of human RIG-I


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 2100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and Dynamics of the Second CARD of Human RIG-I Provide Mechanistic Insights into Regulation of RIG-I Activation.

Ferrage, F.Dutta, K.Nistal-Villan, E.Patel, J.R.Sanchez-Aparicio, M.T.De Ioannes, P.Buku, A.Aseguinolaza, G.G.Garcia-Sastre, A.Aggarwal, A.K.

(2012) Structure 20: 2048-2061

  • DOI: 10.1016/j.str.2012.09.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • RIG-I is a cytosolic sensor of viral RNA, comprised of two N-terminal CARDs followed by helicase and C-terminal regulatory domains (helicase-CTD). Viral RNA binds to the helicase-CTD and "exposes" the CARDs for downstream signaling. The role of the s ...

    RIG-I is a cytosolic sensor of viral RNA, comprised of two N-terminal CARDs followed by helicase and C-terminal regulatory domains (helicase-CTD). Viral RNA binds to the helicase-CTD and "exposes" the CARDs for downstream signaling. The role of the second CARD (CARD2) is essential as RIG-I activation requires dephosphorylation of Thr170 followed by ubiquitination at Lys172. Here, we present the solution structure and dynamics of human RIG-I CARD2. Surprisingly, we find that Thr170 is mostly buried. Parallel studies on the phosphomimetic T170E mutant suggest that the loss of function upon Thr170 phosphorylation is likely associated with changes in the CARD1-CARD2 interface that may prevent Lys172 ubiquitination and/or binding to free K63-linked polyubiquitin. We also demonstrate a strong interaction between CARD2 and the helicase-CTD, and show that mutations at the interface result in constitutive activation of RIG-I. Collectively, our data suggests a close interplay between phosphorylation, ubiquitination, and activation of human RIG-I, all mediated by CARD2.


    Organizational Affiliation

    Ecole Normale Supérieure, Département de Chimie, UMR 7203 CNRS-UPMC-ENS, 24, rue Lhomond, 75005 Paris, France. fabien.ferrage@ens.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable ATP-dependent RNA helicase DDX58
A
100Homo sapiensMutation(s): 1 
Gene Names: DDX58
EC: 3.6.4.13
Find proteins for O95786 (Homo sapiens)
Go to Gene View: DDX58
Go to UniProtKB:  O95786
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 2100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 2LWE Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-31
    Type: Initial release
  • Version 1.1: 2012-12-26
    Type: Database references