Splicing arrays reveal novel RBM10 targets, including SMN2 pre-mRNA

Area of Science:

• Molecular Biology
• Genetics
• RNA Biology

Background:

• RNA Binding Motif 10 (RBM10) is an RNA-binding protein crucial for post-transcriptional gene regulation.
• RBM10 plays a key role in stabilizing messenger RNA (mRNA) and regulating alternative splicing.
• Identifying novel targets of RBM10 is essential for understanding its comprehensive role in cellular processes.

Purpose of the Study:

• To identify novel pre-mRNA targets regulated by RBM10.
• To investigate the impact of RBM10 knockdown on alternative splicing patterns.
• To determine if RBM10 influences the splicing of SMN (survival of motor neuron) pre-mRNA.

Main Methods:

• Downregulation of RBM10 in human cell lines using small interfering RNAs (siRNAs).
• Monitoring alternative splicing events using a reverse transcription-polymerase chain reaction (RT-PCR) screening platform.
• Analyzing gene expression and pathway enrichment in response to RBM10 knockdown.

Main Results:

• RBM10 knockdown altered splicing in 10-20% of pre-mRNAs, with many novel targets identified.
• RAS signaling pathway was significantly affected by RBM10 knockdown.
• RBM10 knockdown promoted the preferential expression of full-length SMN2 transcripts, including at the protein level.

Conclusions:

• This research expands the known repertoire of RBM10-regulated pre-mRNA targets.
• RBM10 is identified as a novel regulator of SMN2 alternative splicing.
• The findings highlight RBM10's critical role in SMN2 expression, relevant to spinal muscular atrophy.