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Updated: Feb 20, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis

An Integrated Approach for Microprotein Identification and Sequence Analysis

Published on: July 12, 2022

BLASTO: a tool for searching orthologous groups.

Yi Zhou¹, Laura F Landweber

¹Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.

Nucleic Acids Research

|May 8, 2007

Summary

BLASTO is a new tool that searches orthologous groups, not single sequences. This improves functional prediction and phylogenetic inference by filtering redundancy and paralogs.

Area of Science:

Bioinformatics
Computational Biology
Genomics

Background:

Traditional BLAST searches identify homologous sequences but can be confounded by redundancy and paralogs.
Orthologous groups represent conserved genes across species, offering a more robust unit for comparative analysis.
Existing tools often focus on single sequence comparisons, limiting comprehensive orthology-based studies.

Purpose of the Study:

To introduce BLAST on Orthologous groups (BLASTO), a modified BLAST tool designed for searching and analyzing orthologous group data.
To enhance functional prediction and phylogenetic inference by treating orthologous groups as units rather than individual sequences.
To provide a unified platform integrating multiple ortholog databases for evolutionary and functional studies.

Main Methods:

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BLASTO treats each orthologous group as a single search unit, outputting ranked lists of groups.
It filters out redundant sequences and potential paralogs within orthologous groups.
A significance score is computed for each orthologous group based on individual BLAST hits and optionally weighted by the number of taxa.

Main Results:

BLASTO improves sequence comparison by focusing on orthologous groups, enhancing functional prediction and phylogenetic inference.
The tool allows users to control species diversity in orthologous group searches through optional weighting.
It integrates data from major multispecies ortholog databases, including NCBI COG, KOG, OrthoMCL, MultiParanoid, and TIGR Eukaryotic Gene Orthologues.

Conclusions:

BLASTO offers a novel approach to orthology searching, improving the accuracy of functional and evolutionary analyses.
The tool facilitates the integration of diverse orthology information for comprehensive biological studies.
BLASTO provides a valuable online platform for researchers studying gene function and evolution across species.