8XV6 image
Entry Detail
PDB ID:
8XV6
Keywords:
Title:
Crystal structure of PHD domain of UHRF1 in complex with mStella peptide (residues 85-119)
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2024-01-14
Release Date:
2024-11-06
Method Details:
Experimental Method:
Resolution:
1.60 Å
R-Value Free:
0.16
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:E3 ubiquitin-protein ligase UHRF1
Chain IDs:A, C
Chain Length:75
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Developmental pluripotency-associated protein 3
Chain IDs:B, D
Chain Length:35
Number of Molecules:2
Biological Source:Mus musculus
Primary Citation
Defining ortholog-specific UHRF1 inhibition by STELLA for cancer therapy.
Nat Commun 16 474 474 (2025)
PMID: 39774694 DOI: 10.1038/s41467-024-55481-7

Abstact

UHRF1 maintains DNA methylation by recruiting DNA methyltransferases to chromatin. In mouse, these dynamics are potently antagonized by a natural UHRF1 inhibitory protein STELLA, while the comparable effects of its human ortholog are insufficiently characterized, especially in cancer cells. Herein, we demonstrate that human STELLA (hSTELLA) is inadequate, while mouse STELLA (mSTELLA) is fully proficient in inhibiting the abnormal DNA methylation and oncogenic functions of UHRF1 in human cancer cells. Structural studies reveal a region of low sequence homology between these STELLA orthologs that allows mSTELLA but not hSTELLA to bind tightly and cooperatively to the essential histone-binding, linked tandem Tudor domain and plant homeodomain (TTD-PHD) of UHRF1, thus mediating ortholog-specific UHRF1 inhibition. For translating these findings to cancer therapy, we use a lipid nanoparticle (LNP)-mediated mRNA delivery approach in which the short mSTELLA, but not hSTELLA regions are required to reverse cancer-specific DNA hypermethylation and impair colorectal cancer tumorigenicity.

Legend

Protein

Chemical

Disease

Primary Citation of related structures