6I3N

Helical MyD88 death domain filament


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

MyD88 Death-Domain Oligomerization Determines Myddosome Architecture: Implications for Toll-like Receptor Signaling.

Moncrieffe, M.C.Bollschweiler, D.Li, B.Penczek, P.A.Hopkins, L.Bryant, C.E.Klenerman, D.Gay, N.J.

(2020) Structure 28: 281-289.e3

  • DOI: https://doi.org/10.1016/j.str.2020.01.003
  • Primary Citation of Related Structures:  
    6I3N

  • PubMed Abstract: 

    Toll-like receptors (TLRs) are pivotal in triggering the innate immune response to pathogen infection. Ligand binding induces receptor dimerization which facilitates the recruitment of other post-receptor signal transducers into a complex signalosome, the Myddosome. Central to this process is Myeloid differentiation primary response 88 (MyD88), which is required by almost all TLRs, and signaling is thought to proceed via the stepwise, sequential assembly of individual components. Here, we show that the death domains of human MyD88 spontaneously and reversibly associate to form helical filaments in vitro. A 3.1-Å cryoelectron microscopy structure reveals that the architecture of the filament is identical to that of the 6:4 MyD88-IRAK4-IRAK2 hetero-oligomeric Myddosome. Additionally, the death domain of IRAK4 interacts with the filaments to reconstitute the non-stoichiometric 6:4 MyD88-IRAK4 complex. Together, these data suggest that intracellularly, the MyD88 scaffold may be pre-formed and poised for recruitment of IRAKs on receptor activation and TIR engagement.


  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK. Electronic address: mcm35@cam.ac.uk.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Myeloid differentiation primary response protein MyD88162Homo sapiensMutation(s): 0 
Gene Names: MYD88
UniProt & NIH Common Fund Data Resources
Find proteins for Q99836 (Homo sapiens)
Explore Q99836 
Go to UniProtKB:  Q99836
PHAROS:  Q99836
GTEx:  ENSG00000172936 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99836
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.0
MODEL REFINEMENTPHENIX1.14

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-11-20
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Other
  • Version 1.2: 2020-02-19
    Changes: Database references
  • Version 1.3: 2020-03-11
    Changes: Database references
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references, Refinement description