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Related Experiment Videos

GObar: a gene ontology based analysis and visualization tool for gene sets.

Jason S M Lee1, Gurpreet Katari, Ravi Sachidanandam

  • 1Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA. jayboy78@gmail.com

BMC Bioinformatics
|July 27, 2005
PubMed
Summary

GObar is a new tool that helps researchers understand large gene sets from genomic analyses. It visualizes gene functions and pathways, improving biological interpretation and identifying significant features.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Genomic analyses generate large gene sets, making biological interpretation challenging.
  • Gene Ontology (GO) annotations aid function identification but can be misleading due to non-uniform gene distributions.
  • Existing methods may not accurately reflect the significance of functions within gene sets.

Purpose of the Study:

  • To develop a robust method for identifying significant functions and pathways in large gene sets.
  • To create a user-friendly, web-based tool for visualizing gene ontology (GO) data.
  • To provide a tool that accounts for the underlying distribution of genes across functions.

Main Methods:

  • Utilized the Gene Ontology hierarchy and annotations for functional enrichment analysis.

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  • Employed the hypergeometric distribution to compare gene list function distribution against the whole genome.
  • Developed GObar, a web-based visualizer implementing the described algorithm.

    • Main Results:

    • GObar accurately identifies significant functions and pathways by comparing gene list distributions to genome-wide distributions.
    • The tool supports gene list analysis for yeast, fly, mouse, and human genomes.
    • Demonstrated GObar's utility through analysis of a pre-mRNA splicing gene list.

    Conclusions:

    • GObar is a freely available web-based tool for analyzing and visualizing gene lists from genomic studies.
    • The tool enhances the biological interpretation of large gene sets.
    • GObar aids researchers in identifying key biological features and pathways.