The regulation and function of post-transcriptional RNA splicing

Area of Science:

• Molecular Biology
• Gene Expression Regulation
• RNA Processing

Background:

• Eukaryotic RNA transcripts require extensive processing, including splicing, to become functional messenger RNAs.
• Splicing is a critical, highly regulated step occurring both co-transcriptionally and post-transcriptionally.
• Recent findings show significant intron retention post-transcription, with removal largely occurring while transcripts associate with chromatin.

Purpose of the Study:

• To review current methodologies for detecting post-transcriptional splicing.
• To discuss the mechanisms controlling the timing of post-transcriptional splicing.
• To examine the impact of temporal splicing regulation on gene expression in health and disease.

Main Methods:

• Review of current methodologies for detecting post-transcriptional splicing.
• Analysis of mechanisms controlling splicing timing.
• Examination of temporal regulation's effects on gene expression.

Main Results:

• Up to 40% of mammalian introns are retained after transcription termination.
• Intron removal largely occurs while transcripts remain chromatin-associated.
• Post-transcriptional splicing acts as a key regulatory layer in development, stress response, and disease.

Conclusions:

• Post-transcriptional splicing dynamically regulates protein production via delayed splicing, nuclear export, or retention/degradation.
• Temporal control of splicing is essential for orchestrating gene expression programs.
• Understanding post-transcriptional splicing is vital for comprehending cellular processes and disease pathogenesis.