Review: Specificity determinants of the plant splicing code

Area of Science:

• Molecular Biology
• Genetics
• Plant Science

Background:

• Alternative splicing (AS) enhances transcriptome complexity and gene expression reprogramming in response to environmental signals.
• Technological advancements allow for high-throughput, accurate analysis of transcriptome-wide AS patterns.
• Established methods in plants enable profiling of splicing regulatory protein interactions with pre-mRNAs.

Purpose of the Study:

• To review current knowledge on alternative splicing regulation in plants.
• To discuss the roles of cis-regulatory elements and trans-acting splicing regulators.
• To explore how precision and specificity in AS are achieved despite simple binding motifs and redundant functions.

Main Methods:

• Transcriptome-wide analysis of alternative splicing patterns.
• Profiling of in vivo interactions between splicing regulatory proteins and pre-mRNAs.
• Functional studies of individual alternative splicing events.

Main Results:

• Identification of critical components of the plant splicing code, including cis-elements and trans-acting factors.
• Understanding the concerted action of these components in splice site selection.
• Characterization of dynamic and complex AS outputs generated by the spliceosome.

Conclusions:

• Alternative splicing regulation in plants involves intricate networks of cis-elements and trans-acting regulators.
• Despite simple target motifs and redundant functions, precise and specific AS is achievable.
• This review synthesizes current understanding and highlights future research directions in plant AS.