4G9Z

Lassa nucleoprotein with dsRNA reveals novel mechanism for immune suppression


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures of Arenaviral Nucleoproteins with Triphosphate dsRNA Reveal a Unique Mechanism of Immune Suppression.

Jiang, X.Huang, Q.Wang, W.Dong, H.Ly, H.Liang, Y.Dong, C.

(2013) J Biol Chem 288: 16949-16959

  • DOI: 10.1074/jbc.M112.420521
  • Primary Citation of Related Structures:  
    4G9Z, 4GV3, 4GV6, 4GV9, 4GVE

  • PubMed Abstract: 
  • A hallmark of severe Lassa fever is the generalized immune suppression, the mechanism of which is poorly understood. Lassa virus (LASV) nucleoprotein (NP) is the only known 3'-5' exoribonuclease that can suppress type I interferon (IFN) production possibly by degrading immune-stimulatory RNAs ...

    A hallmark of severe Lassa fever is the generalized immune suppression, the mechanism of which is poorly understood. Lassa virus (LASV) nucleoprotein (NP) is the only known 3'-5' exoribonuclease that can suppress type I interferon (IFN) production possibly by degrading immune-stimulatory RNAs. How this unique enzymatic activity of LASV NP recognizes and processes RNA substrates is unknown. We provide an atomic view of a catalytically active exoribonuclease domain of LASV NP (LASV NP-C) in the process of degrading a 5' triphosphate double-stranded (ds) RNA substrate, a typical pathogen-associated molecular pattern molecule, to induce type I IFN production. Additionally, we provide for the first time a high-resolution crystal structure of an active exoribonuclease domain of Tacaribe arenavirus (TCRV) NP. Coupled with the in vitro enzymatic and cell-based interferon suppression assays, these structural analyses strongly support a unified model of an exoribonuclease-dependent IFN suppression mechanism shared by all known arenaviruses. New knowledge learned from these studies should aid the development of therapeutics against pathogenic arenaviruses that can infect hundreds of thousands of individuals and kill thousands annually.


    Organizational Affiliation

    Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NucleoproteinC [auth A]213Lassa virus JosiahMutation(s): 0 
Gene Names: N
EC: 3.1.13
UniProt
Find proteins for P13699 (Lassa virus (strain Mouse/Sierra Leone/Josiah/1976))
Explore P13699 
Go to UniProtKB:  P13699
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13699
Protein Feature View
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*GP*CP*CP*C)-3')A [auth E]4N/A
Protein Feature View
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*GP*GP*GP*C)-3')B [auth F]4N/A
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.744α = 90
b = 46.744β = 90
c = 217.315γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
PHASERphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-03
    Type: Initial release
  • Version 1.1: 2013-05-15
    Changes: Database references
  • Version 1.2: 2013-07-24
    Changes: Database references