Genome-Wide Identification of RNA Editing Sites Affecting Muscle Development in Yak

Area of Science:

• Molecular Biology
• Genomics
• Developmental Biology

Background:

• Skeletal muscle development is complex, involving multiple genes and post-transcriptional regulation.
• RNA editing diversifies the transcriptome and proteome by altering RNA nucleotides.
• RNA editing in yak skeletal muscle remains poorly understood.

Purpose of the Study:

• To conduct a genome-wide identification of RNA editing sites in yak skeletal muscle.
• To investigate RNA editing differences between embryonic (ES) and adult (AS) stages.
• To explore the role of RNA editing in yak skeletal muscle development and myogenesis.

Main Methods:

• Whole-genome RNA-editing identification in yak skeletal muscle at ES and AS.
• Annotation of identified RNA editing sites.
• KEGG (Kyoto Encyclopedia of Genes and Genomes) enrichment analysis.

Main Results:

• Identified 11,168 unique RNA editing sites, with many in intergenic regions.
• Found 2,718 editing sites in coding regions, including 858 missense changes.
• Detected 322 editing sites in 3' UTRs potentially affecting miRNA targets.
• Discovered 838 differentially edited sites in 244 genes between ES and AS.
• KEGG analysis linked differentially edited genes to MAPK, AMPK, Wnt, and PI3K-Akt signaling pathways crucial for myogenesis.

Conclusions:

• This study provides the first genome-wide characterization of RNA editing in yak skeletal muscle.
• RNA editing influences yak skeletal muscle development and myogenesis through differential gene regulation.
• Findings enhance understanding of post-transcriptional mechanisms in vertebrate muscle development.