6JPD image
Entry Detail
PDB ID:
6JPD
Keywords:
Title:
Mouse receptor-interacting protein kinase 3 (RIP3) amyloid structure by solid-state NMR
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2019-03-26
Release Date:
2020-10-28
Method Details:
Experimental Method:
Conformers Calculated:
200
Conformers Submitted:
10
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Receptor-interacting serine/threonine-protein kinase 3
Chain IDs:A, B, C, D, E
Chain Length:84
Number of Molecules:5
Biological Source:Mus musculus
Ligand Molecules
Primary Citation
The amyloid structure of mouse RIPK3 (receptor interacting protein kinase 3) in cell necroptosis.
Nat Commun 12 1627 1627 (2021)
PMID: 33712586 DOI: 10.1038/s41467-021-21881-2

Abstact

RIPK3 amyloid complex plays crucial roles during TNF-induced necroptosis and in response to immune defense in both human and mouse. Here, we have structurally characterized mouse RIPK3 homogeneous self-assembly using solid-state NMR, revealing a well-ordered N-shaped amyloid core structure featured with 3 parallel in-register β-sheets. This structure differs from previously published human RIPK1/RIPK3 hetero-amyloid complex structure, which adopted a serpentine fold. Functional studies indicate both RIPK1-RIPK3 binding and RIPK3 amyloid formation are essential but not sufficient for TNF-induced necroptosis. The structural integrity of RIPK3 fibril with three β-strands is necessary for signaling. Molecular dynamics simulations with a mouse RIPK1/RIPK3 model indicate that the hetero-amyloid is less stable when adopting the RIPK3 fibril conformation, suggesting a structural transformation of RIPK3 from RIPK1-RIPK3 binding to RIPK3 amyloid formation. This structural transformation would provide the missing link connecting RIPK1-RIPK3 binding to RIPK3 homo-oligomer formation in the signal transduction.

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Primary Citation of related structures