Principles and Correction of 5'-splice Site Selection
Overview
Affiliations
In Eukarya, immature mRNA transcripts (pre-mRNA) often contain coding sequences, or exons, interleaved by non-coding sequences, or introns. Introns are removed upon , and further regulation of the retained exons leads to alternatively spliced mRNA. The reaction requires the stepwise assembly of the spliceosome, a macromolecular machine composed of small nuclear ribonucleoproteins (snRNPs). This review focuses on the early stage of spliceosome assembly, when U1 snRNP defines each intron 5'-splice site (5'ss) in the pre-mRNA. We first introduce the splicing reaction and the impact of alternative splicing on gene expression regulation. Thereafter, we extensively discuss splicing descriptors that influence the 5'ss selection by U1 snRNP, such as sequence determinants, and interactions mediated by U1-specific proteins or U1 small nuclear RNA (U1 snRNA). We also include examples of diseases that affect the 5'ss selection by U1 snRNP, and discuss recent therapeutic advances that manipulate U1 snRNP 5'ss selectivity with antisense oligonucleotides and small-molecule splicing switches.
Hueso M, Mallen A, Navarro E Biomedicines. 2025; 12(12.
PMID: 39767610 PMC: 11672872. DOI: 10.3390/biomedicines12122703.
A sequential binding mechanism for 5' splice site recognition and modulation for the human U1 snRNP.
White D, Dunyak B, Vaillancourt F, Hoskins A Nat Commun. 2024; 15(1):8776.
PMID: 39389991 PMC: 11467380. DOI: 10.1038/s41467-024-53124-5.
Small molecules modulating RNA splicing: a review of targets and future perspectives.
Bouton L, Ecoutin A, Malard F, Campagne S RSC Med Chem. 2024; 15(4):1109-1126.
PMID: 38665842 PMC: 11042171. DOI: 10.1039/d3md00685a.
A Sequential Binding Mechanism for 5' Splice Site Recognition and Modulation for the Human U1 snRNP.
White D, Dunyak B, Vaillancourt F, Hoskins A bioRxiv. 2024; .
PMID: 38659798 PMC: 11042371. DOI: 10.1101/2024.04.18.590139.
Malard F, Wolter A, Marquevielle J, Morvan E, Ecoutin A, Rudisser S Nucleic Acids Res. 2024; 52(8):4124-4136.
PMID: 38554107 PMC: 11077090. DOI: 10.1093/nar/gkae201.