7AAL image
Entry Detail
PDB ID:
7AAL
Title:
Crystal structure of the F-BAR domain of PSTIPIP1, G258A mutant
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2020-09-04
Release Date:
2022-02-23
Method Details:
Experimental Method:
Resolution:
1.97 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Proline-serine-threonine phosphatase-interacting protein 1
Mutations:G258A
Chain IDs:A, B
Chain Length:292
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
PSTPIP1-LYP phosphatase interaction: structural basis and implications for autoinflammatory disorders.
Cell.Mol.Life Sci. 79 131 131 (2022)
PMID: 35152348 DOI: 10.1007/s00018-022-04173-w

Abstact

Mutations in the adaptor protein PSTPIP1 cause a spectrum of autoinflammatory diseases, including PAPA and PAMI; however, the mechanism underlying these diseases remains unknown. Most of these mutations lie in PSTPIP1 F-BAR domain, which binds to LYP, a protein tyrosine phosphatase associated with arthritis and lupus. To shed light on the mechanism by which these mutations generate autoinflammatory disorders, we solved the structure of the F-BAR domain of PSTPIP1 alone and bound to the C-terminal homology segment of LYP, revealing a novel mechanism of recognition of Pro-rich motifs by proteins in which a single LYP molecule binds to the PSTPIP1 F-BAR dimer. The residues R228, D246, E250, and E257 of PSTPIP1 that are mutated in immunological diseases directly interact with LYP. These findings link the disruption of the PSTPIP1/LYP interaction to these diseases, and support a critical role for LYP phosphatase in their pathogenesis.

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Primary Citation of related structures