Small non-coding RNA within the endogenous spliceosome and alternative splicing regulation

Area of Science:

• Molecular Biology
• RNA Biology
• Gene Regulation

Background:

• Splicing and alternative splicing (AS) are crucial for gene expression, with defects linked to diseases like cancer.
• While splicing mechanisms are understood, AS regulation requires further elucidation.
• Small non-coding RNAs (sncRNAs) like microRNAs and small nucleolar RNAs are known regulators of gene expression.

Purpose of the Study:

• To highlight the novel roles of sncRNAs found within the endogenous spliceosome.
• To explore the potential of spliceosomal sncRNAs in regulating alternative splicing and gene expression.
• To review examples of sncRNAs involved in AS regulation, gene expression, and AS quality control.

Main Methods:

• Review of existing literature on spliceosomal sncRNAs.
• Analysis of non-canonical complex assembly and base-pairing interactions of sncRNAs within the spliceosome.
• Examination of documented functions of sncRNAs in AS regulation, gene expression, and quality control.

Main Results:

• Spliceosomal sncRNAs can assemble in non-canonical complexes.
• These sncRNAs may target different RNAs through alternative base-pairing mechanisms.
• Examples demonstrate spliceosomal sncRNAs regulating AS, gene expression, and AS quality control.

Conclusions:

• Spliceosomal sncRNAs possess novel functions beyond their canonical roles.
• These sncRNAs represent a new layer of regulation for alternative splicing and gene expression.
• Further research into spliceosomal sncRNAs could uncover new therapeutic targets for diseases involving splicing defects.