GFF3sort: a novel tool to sort GFF3 files for tabix indexing.

Area of Science:

• Bioinformatics
• Computational Biology
• Genomics

Background:

• Traditional GFF3 to JSON conversion for JBrowse is time-consuming.
• JBrowse now supports rendering sorted GFF3 files indexed by tabix, offering a more convenient alternative.
• Existing GFF3 sorting tools have limitations leading to inaccurate JBrowse rendering.

Purpose of the Study:

• To develop a novel script for sorting GFF3 files suitable for tabix indexing and JBrowse visualization.
• To address the limitations of current GFF3 sorting tools and ensure accurate JBrowse rendering.

Main Methods:

• Developed GFF3sort, a script specifically for sorting GFF3 files for tabix indexing.
• Implemented handling of features with identical chromosome and start positions, preserving original order or using parent-child topology sorting.
• Tested GFF3sort on datasets from seven species.

Main Results:

• GFF3sort successfully sorts GFF3 files, ensuring accurate JBrowse rendering.
• The script efficiently handles complex sorting scenarios, including features with identical start positions.
• Comparative analysis showed GFF3sort provides accurate results with acceptable efficiency.

Conclusions:

• GFF3sort is a novel and effective tool for sorting GFF3 files for tabix indexing.
• This tool is expected to enhance genome annotation data processing and visualization workflows in JBrowse.