Evaluation and application of RNA-Seq by MinION

Area of Science:

• Genomics
• Molecular Biology
• Bioinformatics

Background:

• Traditional RNA-Sequencing (RNA-Seq) analyzes mRNA fragments, complicating full transcript reconstruction.
• Existing methods face limitations in identifying complex splicing events and allele-specific transcription.

Purpose of the Study:

• To evaluate Nanopore MinION for full-length cDNA sequencing and its applications.
• To assess the utility of long-read RNA-Seq for transcriptomic analysis.

Main Methods:

• Utilized Nanopore MinION for full-length cDNA sequencing (MinION RNA-Seq).
• Applied MinION RNA-Seq to analyze splicing patterns, fusion genes, and single nucleotide polymorphisms (SNPs).
• Constructed a full-length cDNA catalog from seven major organs.

Main Results:

• Achieved practically useful RNA-Seq analysis despite 92.3% sequencing accuracy.
• Identified complex splicing patterns and combinations of full-length cDNAs with precise expression levels.
• Characterized fusion gene transcripts in cancer cells and phased SNPs for allele-specific transcription analysis.
• Demonstrated the feasibility of single-cell RNA-Seq using MinION.

Conclusions:

• Nanopore MinION RNA-Seq offers a complementary approach to traditional RNA-Seq for comprehensive transcriptomic studies.
• Full-length cDNA sequencing provides novel insights into transcript structure, allele-specific events, and gene fusions.
• MinION RNA-Seq is a versatile tool for various genomic applications, including single-cell analysis.