Full-length isoform constructor (FLIC) - a tool for isoform discovery based on long reads

Area of Science:

• Transcriptomics
• Eukaryotic gene expression
• Bioinformatics

Background:

• High-throughput sequencing reveals complex eukaryotic transcriptomes.
• Alternative splicing and transcription start/polyadenylation sites create transcript isoforms.
• Current tools struggle to infer full-length isoforms accurately.

Purpose of the Study:

• To develop a novel pipeline, FLIC (full-length isoform constructor), for robust full-length isoform reconstruction.
• To improve transcript characterization using long-read transcriptome data.
• To provide a valuable tool for analyzing non-model organisms or incomplete annotations.

Main Methods:

• FLIC utilizes long-read transcriptome data.
• Biological replicate concordance filters noise and artifacts.
• Peak calling precisely identifies transcription start and polyadenylation sites.
• Isoform reconstruction requires minimal reliance on existing annotations.

Main Results:

• FLIC accurately reconstructs known and novel isoforms from Arabidopsis thaliana data.
• FLIC outperforms existing tools, particularly without reference annotations.
• FLIC demonstrates equal accuracy to CAGE for transcription start site identification but is faster.

Conclusions:

• FLIC is a valuable tool for comprehensive transcript characterization.
• FLIC is particularly useful for non-model organisms and incomplete annotations.
• FLIC offers an accurate and efficient alternative for isoform analysis.