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Title: Measuring semantic similarities by combining gene ontology annotations and gene co-function networks

Journal Article · · BMC Bioinformatics
 [1];  [2];  [3];  [4];  [3];  [5]
  1. Harbin Institute of Technology, Harbin (China); Michigan State Univ., East Lansing, MI (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Carnegie Institution for Science, Stanford, CA (United States)
  4. Harbin Institute of Technology, Harbin (China)
  5. Michigan State University, East Lansing, MI (United States)

Background: Gene Ontology (GO) has been used widely to study functional relationships between genes. The current semantic similarity measures rely only on GO annotations and GO structure. This limits the power of GO-based similarity because of the limited proportion of genes that are annotated to GO in most organisms. Results: We introduce a novel approach called NETSIM (network-based similarity measure) that incorporates information from gene co-function networks in addition to using the GO structure and annotations. Using metabolic reaction maps of yeast, Arabidopsis, and human, we demonstrate that NETSIM can improve the accuracy of GO term similarities. We also demonstrate that NETSIM works well even for genomes with sparser gene annotation data. We applied NETSIM on large Arabidopsis gene families such as cytochrome P450 monooxygenases to group the members functionally and show that this grouping could facilitate functional characterization of genes in these families. Conclusions: Using NETSIM as an example, we demonstrated that the performance of a semantic similarity measure could be significantly improved after incorporating genome-specific information. NETSIM incorporates both GO annotations and gene co-function network data as a priori knowledge in the model. Therefore, functional similarities of GO terms that are not explicitly encoded in GO but are relevant in a taxon-specific manner become measurable when GO annotations are limited.

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-91ER20021
OSTI ID:
1194164
Journal Information:
BMC Bioinformatics, Vol. 16, Issue 1; ISSN 1471-2105
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Cited By (12)

An online tool for measuring and visualizing phenotype similarities using HPO journal August 2018
Erratum to: InteGO2: a web tool for measuring and visualizing gene semantic similarities using Gene Ontology journal March 2017
OAHG: an integrated resource for annotating human genes with multi-level ontologies journal October 2016
Constructing an integrated gene similarity network for the identification of disease genes conference December 2016
Improving the measurement of semantic similarity by combining gene ontology and co-functional network: a random walk based approach journal March 2018
Constructing Networks of Organelle Functional Modules in Arabidopsis journal August 2016
Exploring Approaches for Detecting Protein Functional Similarity within an Orthology-based Framework journal March 2017
Predicting disease-related genes using integrated biomedical networks journal January 2017
Investigations on factors influencing HPO-based semantic similarity calculation journal September 2017
Measuring disease similarity and predicting disease-related ncRNAs by a novel method journal December 2017
Constructing an integrated gene similarity network for the identification of disease genes journal September 2017
InteGO2: a web tool for measuring and visualizing gene semantic similarities using Gene Ontology journal August 2016

Figures / Tables (8)