Intronic RNA secondary structural information captured for the human MYC pre-mRNA

Area of Science:

• Molecular Biology
• RNA Biology
• Genomics

Background:

• Secondary structure probing of RNA often lacks intronic sequence coverage.
• Understanding pre-mRNA secondary structures is vital for gene regulation.
• The human MYC gene is a key oncogene with complex regulatory mechanisms.

Purpose of the Study:

• To develop a novel method for enhanced intronic read coverage in RNA secondary structure analysis.
• To investigate the secondary structure of human MYC pre-mRNA, particularly intronic regions.
• To identify potential therapeutic targets by understanding MYC RNA splicing regulation.

Main Methods:

• Development and application of the SIRP-seq (spliceosomal inhibition with RNA probing and sequencing) method.
• Chemical probing of HeLa cells using dimethyl sulfate in the presence of pladienolide B, a spliceosome inhibitor.
• Utilizing DMS-MaPseq and the DRACO program for reactivity profile analysis and secondary structure prediction.

Main Results:

• SIRP-seq successfully increased read coverage over intronic regions of MYC pre-mRNA.
• Distinct reactivity profiles and multiple secondary structural conformations of MYC RNA were deduced.
• The study provided sufficient data depth for analysis by the DRACO program.

Conclusions:

• SIRP-seq offers a new approach for intronic RNA secondary structure analysis.
• The findings provide specific structural insights into MYC RNA splicing regulation.
• The results highlight potential avenues for therapeutic targeting of MYC RNA.