4L5T

Crystal structure of the tetrameric p202 HIN2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular Mechanism for p202-Mediated Specific Inhibition of AIM2 Inflammasome Activation.

Yin, Q.Sester, D.P.Tian, Y.Hsiao, Y.S.Lu, A.Cridland, J.A.Sagulenko, V.Thygesen, S.J.Choubey, D.Hornung, V.Walz, T.Stacey, K.J.Wu, H.

(2013) Cell Rep 4: 327-339

  • DOI: 10.1016/j.celrep.2013.06.024
  • Primary Citation of Related Structures:  
    4L5Q, 4L5R, 4L5S, 4L5T

  • PubMed Abstract: 
  • Mouse p202 containing two hemopoietic expression, interferon inducibility, nuclear localization (HIN) domains antagonizes AIM2 inflammasome signaling and potentially modifies lupus susceptibility. We found that only HIN1 of p202 binds double-stranded ...

    Mouse p202 containing two hemopoietic expression, interferon inducibility, nuclear localization (HIN) domains antagonizes AIM2 inflammasome signaling and potentially modifies lupus susceptibility. We found that only HIN1 of p202 binds double-stranded DNA (dsDNA), while HIN2 forms a homotetramer. Crystal structures of HIN1 revealed that dsDNA is bound on face opposite the site used in AIM2 and IFI16. The structure of HIN2 revealed a dimer of dimers, the face analogous to the HIN1 dsDNA binding site being a dimerization interface. Electron microscopy imaging showed that HIN1 is flexibly linked to HIN2 in p202, and tetramerization provided enhanced avidity for dsDNA. Surprisingly, HIN2 of p202 interacts with the AIM HIN domain. We propose that this results in a spatial separation of the AIM2 pyrin domains, and indeed p202 prevented the dsDNA-dependent clustering of apoptosis-associated speck-like protein containing caspase recruitment domain (ASC) and AIM2 inflammasome activation. We hypothesize that while p202 was evolutionarily selected to limit AIM2-mediated inflammation in some mouse strains, the same mechanism contributes to increased interferon production and lupus susceptibility.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Interferon-activable protein 202ABCD203Mus musculusMutation(s): 4 
Gene Names: Ifi202Ifi202aIfi202b
Find proteins for Q9R002 (Mus musculus)
Explore Q9R002 
Go to UniProtKB:  Q9R002
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.892α = 90
b = 71.86β = 102.38
c = 95.465γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
DENZOdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2013-06-11 
  • Released Date: 2013-07-31 
  • Deposition Author(s): Yin, Q., Tian, Y., Wu, H.

Revision History 

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-08-21
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description