3RNU

Structural Basis of Cytosolic DNA Sensing by Innate Immune Receptors


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of the HIN Domain:DNA Complexes Reveal Ligand Binding and Activation Mechanisms of the AIM2 Inflammasome and IFI16 Receptor.

Jin, T.Perry, A.Jiang, J.Smith, P.Curry, J.A.Unterholzner, L.Jiang, Z.Horvath, G.Rathinam, V.A.Johnstone, R.W.Hornung, V.Latz, E.Bowie, A.G.Fitzgerald, K.A.Xiao, T.S.

(2012) Immunity 36: 561-571

  • DOI: https://doi.org/10.1016/j.immuni.2012.02.014
  • Primary Citation of Related Structures:  
    3RLN, 3RLO, 3RN2, 3RN5, 3RNU

  • PubMed Abstract: 

    Recognition of DNA by the innate immune system is central to antiviral and antibacterial defenses, as well as an important contributor to autoimmune diseases involving self DNA. AIM2 (absent in melanoma 2) and IFI16 (interferon-inducible protein 16) have been identified as DNA receptors that induce inflammasome formation and interferon production, respectively. Here we present the crystal structures of their HIN domains in complex with double-stranded (ds) DNA. Non-sequence-specific DNA recognition is accomplished through electrostatic attraction between the positively charged HIN domain residues and the dsDNA sugar-phosphate backbone. An intramolecular complex of the AIM2 Pyrin and HIN domains in an autoinhibited state is liberated by DNA binding, which may facilitate the assembly of inflammasomes along the DNA staircase. These findings provide mechanistic insights into dsDNA as the activation trigger and oligomerization platform for the assembly of large innate signaling complexes such as the inflammasomes.


  • Organizational Affiliation

    Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-0430, USA.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-interferon-inducible protein 16
A, B, C, D
204Homo sapiensMutation(s): 0 
Gene Names: IFI16IFNGIP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q16666 (Homo sapiens)
Explore Q16666 
Go to UniProtKB:  Q16666
PHAROS:  Q16666
GTEx:  ENSG00000163565 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ16666
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*CP*CP*AP*TP*CP*AP*AP*AP*GP*AP*GP*AP*GP*AP*G)-3')E [auth K]16N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*CP*TP*CP*TP*CP*TP*TP*TP*GP*AP*TP*GP*GP*CP*C)-3')F [auth L]16N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.841α = 90
b = 126.841β = 90
c = 163.868γ = 120
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-25
    Type: Initial release
  • Version 1.1: 2012-05-09
    Changes: Database references
  • Version 1.2: 2015-01-28
    Changes: Other
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description