4P4H

Caught-in-action signaling complex of RIG-I 2CARD domain and MAVS CARD domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Imprinting as a Signal-Activation Mechanism of the Viral RNA Sensor RIG-I.

Wu, B.Peisley, A.Tetrault, D.Li, Z.Egelman, E.H.Magor, K.E.Walz, T.Penczek, P.A.Hur, S.

(2014) Mol.Cell 55: 511-523

  • DOI: 10.1016/j.molcel.2014.06.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • RIG-I activates interferon signaling pathways by promoting filament formation of the adaptor molecule, MAVS. Assembly of the MAVS filament is mediated by its CARD domain (CARD(MAVS)), and requires its interaction with the tandem CARDs of RIG-I (2CARD ...

    RIG-I activates interferon signaling pathways by promoting filament formation of the adaptor molecule, MAVS. Assembly of the MAVS filament is mediated by its CARD domain (CARD(MAVS)), and requires its interaction with the tandem CARDs of RIG-I (2CARD(RIG-I)). However, the precise nature of the interaction between 2CARD(RIG-I) and CARD(MAVS), and how this interaction leads to CARD(MAVS) filament assembly, has been unclear. Here we report a 3.6 Å electron microscopy structure of the CARD(MAVS) filament and a 3.4 Å crystal structure of the 2CARD(RIG-I):CARD(MAVS) complex, representing 2CARD(RIG-I) "caught in the act" of nucleating the CARD(MAVS) filament. These structures, together with functional analyses, show that 2CARD(RIG-I) acts as a template for the CARD(MAVS) filament assembly, by forming a helical tetrameric structure and recruiting CARD(MAVS) along its helical trajectory. Our work thus reveals that signal activation by RIG-I occurs by imprinting its helical assembly architecture on MAVS, a previously uncharacterized mechanism of signal transmission.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Children's Hospital Boston, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable ATP-dependent RNA helicase DDX58
A, B, C, D, E, F, G, H
205Homo 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
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Mitochondrial antiviral-signaling protein
I, J, K, L, N, O, P, M
108Homo sapiensMutation(s): 3 
Gene Names: MAVS (IPS1, KIAA1271, VISA)
Find proteins for Q7Z434 (Homo sapiens)
Go to Gene View: MAVS
Go to UniProtKB:  Q7Z434
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-60S ribosomal protein L40
S, T, U, W, X
79Homo sapiensMutation(s): 0 
Gene Names: UBA52 (UBCEP2)
Find proteins for P62987 (Homo sapiens)
Go to Gene View: UBA52
Go to UniProtKB:  P62987
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 111.810α = 90.00
b = 117.330β = 90.00
c = 257.510γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-03-12 
  • Released Date: 2014-07-30 
  • Deposition Author(s): Wu, B., Hur, S.

Revision History 

  • Version 1.0: 2014-07-30
    Type: Initial release
  • Version 1.1: 2014-10-01
    Type: Database references
  • Version 1.2: 2015-01-07
    Type: Database references