4G8L

Active state of intact sensor domain of human RNase L with 2-5A bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.230 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Innate Immune Messenger 2-5A Tethers Human RNase L into Active High-Order Complexes.

Han, Y.Whitney, G.Donovan, J.Korennykh, A.

(2012) Cell Rep 2: 902-913

  • DOI: https://doi.org/10.1016/j.celrep.2012.09.004
  • Primary Citation of Related Structures:  
    4G8K, 4G8L

  • PubMed Abstract: 

    2',5'-linked oligoadenylates (2-5As) serve as conserved messengers of pathogen presence in the mammalian innate immune system. 2-5As induce self-association and activation of RNase L, which cleaves cytosolic RNA and promotes the production of interferons (IFNs) and cytokines driven by the transcription factors IRF-3 and NF-κB. We report that human RNase L is activated by forming high-order complexes, reminiscent of the mode of activation of the phylogenetically related transmembrane kinase/RNase Ire1 in the unfolded protein response. We describe crystal structures determined at 2.4 Å and 2.8 Å resolution, which show that two molecules of 2-5A at a time tether RNase L monomers via the ankyrin-repeat (ANK) domain. Each ANK domain harbors two distinct sites for 2-5A recognition that reside 50 Å apart. These data reveal a function for the ANK domain as a 2-5A-sensing homo-oligomerization device and describe a nonlinear, ultrasensitive regulation in the 2-5A/RNase L system poised for amplification of the IFN response.


  • Organizational Affiliation

    Department of Molecular Biology, Princeton University, 216 Schultz Laboratory, Princeton, NJ 08540, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
2-5A-dependent ribonuclease
A, B, C, D
337Homo sapiensMutation(s): 0 
Gene Names: RNASELRNS4
EC: 3.1.26
UniProt & NIH Common Fund Data Resources
Find proteins for Q05823 (Homo sapiens)
Explore Q05823 
Go to UniProtKB:  Q05823
PHAROS:  Q05823
GTEx:  ENSG00000135828 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05823
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
25A PDBBind:  4G8L Kd: 10 (nM) from 1 assay(s)
BindingDB:  4G8L IC50: min: 1.1, max: 20 (nM) from 3 assay(s)
EC50: 0.21 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.98α = 90
b = 164.11β = 100.2
c = 86.22γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-31
    Type: Initial release
  • Version 1.1: 2012-11-14
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description