An expanded evaluation of protein function prediction methods shows an improvement in accuracy

Jiang, Y., Oron, T. R., Clark, W. T., Bankapur, A. R., D'Andrea, D., Lepore, R., Funk, C. S., Kahanda, I., Verspoor, K. M., Ben-Hur, A., Koo da, C. E., Penfold-Brown, D., Shasha, D., Youngs, N., Bonneau, R., Lin, A., Sahraeian, S. M., Martelli, P. L., Profiti, G., Casadio, R., Cao, R., Zhong, Z., Cheng, J., Altenhoff, A., Skunca, N., Dessimoz, C., Dogan, T., Hakala, K., Kaewphan, S., Mehryary, F., Salakoski, T., Ginter, F., Fang, H., Smithers, B., Oates, M., Gough, J., Toronen, P., Koskinen, P., Holm, L., Chen, C. T., Hsu, W. L., Bryson, K., Cozzetto, D., Minneci, F., Jones, D. T., Chapman, S., Bkc, D., Khan, I. K., Kihara, D., Ofer, D., Rappoport, N., Stern, A., Cibrian-Uhalte, E., Denny, P., Foulger, R. E., Hieta, R., Legge, D., Lovering, R. C., Magrane, M., Melidoni, A. N., Mutowo-Meullenet, P., Pichler, K., Shypitsyna, A., Li, B., Zakeri, P., ElShal, S., Tranchevent, L. C., Das, S., Dawson, N. L., Lee, D., Lees, J. G., Sillitoe, I., Bhat, P., Nepusz, T., Romero, A. E., Sasidharan, R., Yang, H., Paccanaro, A., Gillis, J., Sedeno-Cortes, A. E., Pavlidis, P., Feng, S., Cejuela, J. M., Goldberg, T., Hamp, T., Richter, L., Salamov, A., Gabaldon, T., Marcet-Houben, M., Supek, F., Gong, Q., Ning, W., Zhou, Y., Tian, W., Falda, M., Fontana, P., Lavezzo, E., Toppo, S., Ferrari, C., Giollo, M. (2016) An expanded evaluation of protein function prediction methods shows an improvement in accuracy. Genome Biol, 17 (1). p. 184. ISSN 1474-760X (Electronic)1474-7596 (Linking)

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URL: http://www.ncbi.nlm.nih.gov/pubmed/27604469
DOI: 10.1186/s13059-016-1037-6

Abstract

BACKGROUND: A major bottleneck in our understanding of the molecular underpinnings of life is the assignment of function to proteins. While molecular experiments provide the most reliable annotation of proteins, their relatively low throughput and restricted purview have led to an increasing role for computational function prediction. However, assessing methods for protein function prediction and tracking progress in the field remain challenging. RESULTS: We conducted the second critical assessment of functional annotation (CAFA), a timed challenge to assess computational methods that automatically assign protein function. We evaluated 126 methods from 56 research groups for their ability to predict biological functions using Gene Ontology and gene-disease associations using Human Phenotype Ontology on a set of 3681 proteins from 18 species. CAFA2 featured expanded analysis compared with CAFA1, with regards to data set size, variety, and assessment metrics. To review progress in the field, the analysis compared the best methods from CAFA1 to those of CAFA2. CONCLUSIONS: The top-performing methods in CAFA2 outperformed those from CAFA1. This increased accuracy can be attributed to a combination of the growing number of experimental annotations and improved methods for function prediction. The assessment also revealed that the definition of top-performing algorithms is ontology specific, that different performance metrics can be used to probe the nature of accurate predictions, and the relative diversity of predictions in the biological process and human phenotype ontologies. While there was methodological improvement between CAFA1 and CAFA2, the interpretation of results and usefulness of individual methods remain context-dependent.

Item Type: Paper
Uncontrolled Keywords: Disease gene prioritization Protein function prediction
Subjects: bioinformatics
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein expression
CSHL Authors:
Communities: Banbury Center
CSHL labs > Gillis Lab
Depositing User: Matt Covey
Date Deposited: 22 Sep 2016 13:30
Last Modified: 27 Oct 2016 18:17
PMCID: PMC5015320
Related URLs:
URI: http://repository.cshl.edu/id/eprint/33543

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