Normal, novel or none: versatile regulation from alternative splicing.

Area of Science:

• Molecular Biology
• Genetics
• Plant Science

Background:

• Pre-mRNA splicing is crucial for gene expression regulation, catalyzed by the spliceosome.
• In Arabidopsis, over 61% of transcripts undergo alternative splicing (AS), creating proteome diversity.
• AS events increase under adverse stimuli, enhancing plant stress tolerance.

Purpose of the Study:

• To comprehensively review advances in understanding alternative splicing (AS) in Arabidopsis.
• To highlight the biological functions and mechanisms of AS events and their regulators.
• To provide prospects for future research on AS in crops.

Main Methods:

• Literature review of functional characterization of AS variants and splicing regulators.
• Analysis of recent advances in understanding AS mechanisms in response to stimuli.
• Synthesis of current knowledge on AS in Arabidopsis for crop applications.

Main Results:

• Alternative splicing generates diverse transcripts, including those encoding novel proteins or targeted for nonsense-mediated decay (NMD).
• Splicing factors and regulators play key roles in modulating AS events at the posttranscriptional level.
• AS is a significant contributor to transcriptome and proteome diversity in plants, particularly under stress conditions.

Conclusions:

• Alternative splicing is a fundamental mechanism for generating molecular diversity and adapting to environmental stress in plants.
• Understanding AS and its regulators in Arabidopsis provides insights applicable to improving crop resilience and yield.
• Further research on AS mechanisms and regulators holds promise for agricultural biotechnology.