2N1F

Structure and assembly of the mouse ASC filament by combined NMR spectroscopy and cryo-electron microscopy


Experimental Data Snapshot

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure and assembly of the mouse ASC inflammasome by combined NMR spectroscopy and cryo-electron microscopy.

Sborgi, L.Ravotti, F.Dandey, V.P.Dick, M.S.Mazur, A.Reckel, S.Chami, M.Scherer, S.Huber, M.Bockmann, A.Egelman, E.H.Stahlberg, H.Broz, P.Meier, B.H.Hiller, S.

(2015) Proc Natl Acad Sci U S A 112: 13237-13242

  • DOI: 10.1073/pnas.1507579112
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Inflammasomes are multiprotein complexes that control the innate immune response by activating caspase-1, thus promoting the secretion of cytokines in response to invading pathogens and endogenous triggers. Assembly of inflammasomes is induced by act ...

    Inflammasomes are multiprotein complexes that control the innate immune response by activating caspase-1, thus promoting the secretion of cytokines in response to invading pathogens and endogenous triggers. Assembly of inflammasomes is induced by activation of a receptor protein. Many inflammasome receptors require the adapter protein ASC [apoptosis-associated speck-like protein containing a caspase-recruitment domain (CARD)], which consists of two domains, the N-terminal pyrin domain (PYD) and the C-terminal CARD. Upon activation, ASC forms large oligomeric filaments, which facilitate procaspase-1 recruitment. Here, we characterize the structure and filament formation of mouse ASC in vitro at atomic resolution. Information from cryo-electron microscopy and solid-state NMR spectroscopy is combined in a single structure calculation to obtain the atomic-resolution structure of the ASC filament. Perturbations of NMR resonances upon filament formation monitor the specific binding interfaces of ASC-PYD association. Importantly, NMR experiments show the rigidity of the PYD forming the core of the filament as well as the high mobility of the CARD relative to this core. The findings are validated by structure-based mutagenesis experiments in cultured macrophages. The 3D structure of the mouse ASC-PYD filament is highly similar to the recently determined human ASC-PYD filament, suggesting evolutionary conservation of ASC-dependent inflammasome mechanisms.


    Organizational Affiliation

    Biozentrum, University of Basel, 4056 Basel, Switzerland; petr.broz@unibas.ch beme@ethz.ch sebastian.hiller@unibas.ch.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Apoptosis-associated speck-like protein
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O
89Mus musculusMutation(s): 0 
Gene Names: PycardAsc
Find proteins for Q9EPB4 (Mus musculus)
Go to UniProtKB:  Q9EPB4
Experimental Data & Validation

Experimental Data

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2N1F Olderado
  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
  • OLDERADO: 2N1F Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-14
    Type: Initial release
  • Version 1.1: 2015-10-28
    Changes: Database references
  • Version 1.2: 2015-11-11
    Changes: Database references
  • Version 1.3: 2018-07-18
    Changes: Author supporting evidence, Data collection