7OBT image
Deposition Date 2021-04-23
Release Date 2022-05-04
Last Version Date 2024-11-13
Entry Detail
PDB ID:
7OBT
Keywords:
SIGNALING PROTEIN
Title:
Crystal structure of 14-3-3 sigma in complex with RIPK2 phosphopeptide and stabilizer Fusicoccin-A
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.30 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
C 2 2 21
7OBT validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:14-3-3 protein sigma
Gene (Uniprot):SFN
Chain IDs:A
Chain Length:253
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P31947 Pfam ID:PF00244
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Receptor-interacting serine/threonine-protein kinase 2
Gene (Uniprot):RIPK2
Chain IDs:B
Chain Length:11
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O43353 EC:2.7.10.2
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CSO A CYS modified residue
SEP B SER modified residue
Ligand Molecules
CL
FSC
MG
Primary Citation
IFN alpha primes cancer cells for Fusicoccin-induced cell death via 14-3-3 PPI stabilization.
Cell Chem Biol ? ? ? (2023)
PMID: 37130519 DOI: 10.1016/j.chembiol.2023.04.005

Abstact

The natural product family of the fusicoccanes (FCs) has been shown to display anti-cancer activity, especially when combined with established therapeutic agents. FCs stabilize 14-3-3 protein-protein interactions (PPIs). Here, we tested combinations of a small library of FCs with interferon α (IFNα) on different cancer cell lines and report a proteomics approach to identify the specific 14-3-3 PPIs that are induced by IFNα and stabilized by FCs in OVCAR-3 cells. Among the identified 14-3-3 target proteins are THEMIS2, receptor interacting protein kinase 2 (RIPK2), EIF2AK2, and several members of the LDB1 complex. Biophysical and structural biology studies confirm these 14-3-3 PPIs as physical targets of FC stabilization, and transcriptome as well as pathway analyses suggest possible explanations for the observed synergistic effect of IFNα/FC treatment on cancer cells. This study elucidates the polypharmacological effects of FCs in cancer cells and identifies potential targets from the vast interactome of 14-3-3s for therapeutic intervention in oncology.

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Disease

Primary Citation of related structures
7OBT