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Exploring Disordered Regions of Human Spliceosome Proteins
Bruno de Paula Oliveira Santos1, Krishnendu Bera2, Luca Grisanti2
1Department of Chemistry "Ugo Schiff" and Magnetic Resonance Center (CERM), University of Florence, via Luigi Sacconi, 6, 50019 Sesto Fiorentino (FI), Italy.
The Journal of Physical Chemistry Letters
|February 14, 2026
Summary
Intrinsically disordered regions (IDRs) in the spliceosome are crucial for RNA splicing regulation. These flexible protein regions are frequently altered in cancer, highlighting their role in disease.
Area of Science:
- Molecular Biology
- Bioinformatics
- Genomics
Background:
- The spliceosome, a complex machinery, removes introns from pre-mRNAs.
- Intrinsically disordered regions (IDRs) lack stable structures and are abundant in spliceosome proteins.
- IDRs' flexibility allows them to mediate protein-RNA interactions and regulate splicing.
Purpose of the Study:
- To conduct a comprehensive bioinformatics analysis of the human spliceosome proteome.
- To investigate the role and characteristics of intrinsically disordered regions (IDRs) in spliceosome function.
- To explore the implications of spliceosome IDRs in cancer development.
Main Methods:
- Bioinformatics analysis of the human spliceosome proteome.
- Assessment of protein disorder content and sequence composition.
- Analysis of evolutionary conservation and post-translational modifications (PTMs).
- Investigation of cancer-associated mutations within IDRs.
Main Results:
- Many human spliceosome proteins contain over 40% disordered residues.
- Spliceosome IDRs are characterized by charged and RS-like sequences, with conserved features across species.
- IDRs are frequently modified by phosphorylation and are mutation hotspots in cancer.
- These findings reveal a significant link between spliceosome IDRs and various cancers.
Conclusions:
- Intrinsically disordered regions (IDRs) play a pivotal role in spliceosome-mediated RNA splicing.
- The prevalence of IDRs and their alterations in cancer underscore their significance in disease pathogenesis.
- Further research into spliceosome IDRs could offer new therapeutic strategies for cancer.
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