Phylogenetic-based propagation of functional annotations within the Gene Ontology consortium

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ID: 301075
2011
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Abstract
The goal of the Gene Ontology (GO) project is to provide a uniform way to describe the functions of gene products from organisms across all kingdoms of life and thereby enable analysis of genomic data. Protein annotations are either based on experiments or predicted from protein sequences. Since most sequences have not been experimentally characterized, most available annotations need to be based on predictions. To make as accurate inferences as possible, the GO Consortium's Reference Genome Project is using an explicit evolutionary framework to infer annotations of proteins from a broad set of genomes from experimental annotations in a semi-automated manner. Most components in the pipeline, such as selection of sequences, building multiple sequence alignments and phylogenetic trees, retrieving experimental annotations and depositing inferred annotations, are fully automated. However, the most crucial step in our pipeline relies on software-assisted curation by an expert biologist. This curation tool, Phylogenetic Annotation and INference Tool (PAINT) helps curators to infer annotations among members of a protein family. PAINT allows curators to make precise assertions as to when functions were gained and lost during evolution and record the evidence (e.g. experimentally supported GO annotations and phylogenetic information including orthology) for those assertions. In this article, we describe how we use PAINT to infer protein function in a phylogenetic context with emphasis on its strengths, limitations and guidelines. We also discuss specific examples showing how PAINT annotations compare with those generated by other highly used homology-based methods.
Reference Key
openalex_W2171815113 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Pascale Gaudet, Michael Livstone, Suzanna Lewis, Paul D. Thomas
Journal Briefings in bioinformatics
Year 2011
DOI
10.1093/bib/bbr042
URL
https://academic.oup.com/bib/article-pdf/12/5/449/755482/bbr042.pdf
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