4L5T

Crystal structure of the tetrameric p202 HIN2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.405 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon-activable protein 202
A, B, C, D
203Mus musculusMutation(s): 0 
Gene Names: Ifi202 (Ifi202a, Ifi202b)
Find proteins for Q9R002 (Mus musculus)
Go to UniProtKB:  Q9R002
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.405 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 61.892α = 90.00
b = 71.860β = 102.38
c = 95.465γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description