Principles and correction of 5'-splice site selection.

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Eukaryotic gene expression involves splicing, where introns are removed from pre-mRNA.
• Alternative splicing regulates gene expression by retaining different exons.
• Spliceosome assembly, a complex process, is crucial for accurate mRNA maturation.

Purpose of the Study:

• To review the early stage of spliceosome assembly, focusing on U1 snRNP's role in 5'-splice site (5'ss) selection.
• To discuss factors influencing 5'ss recognition by U1 snRNP.
• To highlight diseases and therapeutic strategies related to U1 snRNP 5'ss selectivity.

Main Methods:

• Review of existing literature on pre-mRNA splicing and spliceosome assembly.
• Analysis of sequence determinants and protein/RNA interactions affecting 5'ss selection.
• Discussion of disease mechanisms and therapeutic approaches involving U1 snRNP.

Main Results:

• U1 snRNP plays a critical role in defining the 5'ss during spliceosome assembly.
• Sequence composition, U1-specific proteins, and U1 snRNA interactions modulate 5'ss selection.
• Dysregulation of 5'ss selection is linked to various diseases.

Conclusions:

• Understanding U1 snRNP's 5'ss selectivity is key to comprehending gene regulation and disease.
• Antisense oligonucleotides and small-molecule splicing switches offer therapeutic potential for modulating splicing.