Download MendeleyPathogenic mutations of human phosphorylation sites affect protein-protein interactions.
Rrustemi, T., Meyer, K., Roske, Y., Uyar, B., Akalin, A., Imami, K., Ishihama, Y., Daumke, O., Selbach, M.(2024) Nat Commun 15: 3146-3146
- PubMed: 38605029
- DOI: https://doi.org/10.1038/s41467-024-46794-8
- Primary Citation of Related Structures:
8Q1S - PubMed Abstract:
Despite their lack of a defined 3D structure, intrinsically disordered regions (IDRs) of proteins play important biological roles. Many IDRs contain short linear motifs (SLiMs) that mediate protein-protein interactions (PPIs), which can be regulated by post-translational modifications like phosphorylation. 20% of pathogenic missense mutations are found in IDRs, and understanding how such mutations affect PPIs is essential for unraveling disease mechanisms. Here, we employ peptide-based interaction proteomics to investigate 36 disease-associated mutations affecting phosphorylation sites. Our results unveil significant differences in interactomes between phosphorylated and non-phosphorylated peptides, often due to disrupted phosphorylation-dependent SLiMs. We focused on a mutation of a serine phosphorylation site in the transcription factor GATAD1, which causes dilated cardiomyopathy. We find that this phosphorylation site mediates interaction with 14-3-3 family proteins. Follow-up experiments reveal the structural basis of this interaction and suggest that 14-3-3 binding affects GATAD1 nucleocytoplasmic transport by masking a nuclear localisation signal. Our results demonstrate that pathogenic mutations of human phosphorylation sites can significantly impact protein-protein interactions, offering insights into potential molecular mechanisms underlying pathogenesis.
Organizational Affiliation:
Max Delbrück Center (MDC), Robert-Rössle-Str. 10, 13125, Berlin, Germany.
