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Updated: Dec 14, 2025

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

Published on: June 24, 2021

Extending rnaSPAdes functionality for hybrid transcriptome assembly.

Andrey D Prjibelski¹, Giuseppe D Puglia², Dmitry Antipov³

¹Center for Algorithmic Biotechnology, Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia. a.przhibelsky@spbu.ru.

BMC Bioinformatics

|July 25, 2020

Summary

This summary is machine-generated.

This study introduces a new method for de novo transcriptome assembly using both short and long RNA reads. The hybrid approach improves the reconstruction of full-length genes and alternative isoforms, enhancing transcriptomic analysis.

Keywords:

De novo assembly Hybrid assembly Iso-seq Oxford nanopores RNA-Seq Transcriptome assembly Transcriptomics

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Area of Science:

Genomics
Transcriptomics
Bioinformatics

Background:

De novo RNA-Seq assembly is crucial for transcriptomic analysis without a reference genome.
Short reads limit the reconstruction of complex genes and alternative isoforms.
Long RNA reads offer potential for improved assembly quality but lack established de novo pipelines.

Purpose of the Study:

To develop a novel method for high-quality de novo transcriptome assembly.
To leverage the strengths of both short and long RNA reads for improved transcript reconstruction.
To establish a de novo assembly pipeline for long RNA sequencing data.

Main Methods:

Developed a novel hybrid method combining short read accuracy with long read exon structure information.
Integrated existing hybridSPAdes approach into the rnaSPAdes pipeline.
Adapted the pipeline specifically for transcriptomic data analysis.

Main Results:

Demonstrated high-quality de novo transcriptome assemblies.
Hybrid assemblies incorporated accuracy of short reads and exon information from long reads.
Showcased improved reconstruction of full-length genes and alternative isoforms compared to short-read-only assemblies.

Conclusions:

The novel hybrid method significantly enhances de novo transcriptome assembly.
Utilizing both Illumina short reads and PacBio/ONT long reads yields superior results.
The developed rnaSPAdes pipeline provides a robust solution for analyzing transcriptomes with diverse read lengths.