8IB0 image
Entry Detail
PDB ID:
8IB0
Keywords:
Title:
The amyloid structure of mouse RIPK1 RHIM-containing domain by solid-state NMR
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-02-09
Release Date:
2023-03-22
Method Details:
Experimental Method:
Conformers Calculated:
196
Conformers Submitted:
10
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Receptor-interacting serine/threonine-protein kinase 1
Chain IDs:A, B, C, D, E
Chain Length:24
Number of Molecules:5
Biological Source:Mus musculus
Ligand Molecules
Primary Citation
The structure of mouse RIPK1 RHIM-containing domain as a homo-amyloid and in RIPK1/RIPK3 complex.
Nat Commun 15 6975 6975 (2024)
PMID: 39143113 DOI: 10.1038/s41467-024-51303-y

Abstact

Receptor-interacting protein kinase 1 (RIPK1) is a therapeutic target in treating neurodegenerative diseases and cancers. RIPK1 has three distinct functional domains, with the center domain containing a receptor-interacting protein homotypic interaction motif (RHIM), which mediates amyloid formation. The functional amyloid formed by RIPK1 and/or RIPK3 is a crucial intermediate in regulating cell necroptosis. In this study, the amyloid structure of mouse RIPK1, formed by an 82-residue sequence centered at RHIM, is presented. It reveals the "N"-shaped folding of the protein subunit in the fibril with four β-strands. The folding pattern is shared by several amyloid structures formed by proteins with RHIM, with the central β-strand formed by the most conserved tetrad sequence I/VQI/VG. However, the solid-state NMR results indicate a structural difference between mouse RIPK1 and mouse RIPK3. A change in the structural rigidity is also suggested by the observation of weakened signals for mouse RIPK3 upon mixing with RIPK1 to form the RIPK1/RIPK3 complex fibrils. Our results provide vital information to understand the interactions between different proteins with RHIM, which will help us further comprehend the regulation mechanism in cell necroptosis.

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Primary Citation of related structures