title: Literature curation of protein interactions: measuring agreement across major public databases.
abstract: Literature curation of protein interaction data faces a number of challenges. Although curators increasingly adhere to standard data representations, the data that various databases actually record from the same published information may differ significantly. Some of the reasons underlying these differences are well known, but their global impact on the interactions collectively curated by major public databases has not been evaluated. Here we quantify the agreement between curated interactions from 15 471 publications shared across nine major public databases. Results show that on average, two databases fully agree on 42% of the interactions and 62% of the proteins curated from the same publication. Furthermore, a sizable fraction of the measured differences can be attributed to divergent assignments of organism or splice isoforms, different organism focus and alternative representations of multi-protein complexes. Our findings highlight the impact of divergent curation policies across databases, and should be relevant to both curators and data consumers interested in analyzing protein-interaction data generated by the scientific community. Database URL: http://wodaklab.org/iRefWeb.
authors.affiliation: Molecular Structure and Function Program, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, Canada.
authors.forename: Andrei L
authors.initials: AL
authors.lastname: Turinsky
authors.forename: Sabry
authors.initials: S
authors.lastname: Razick
authors.forename: Brian
authors.initials: B
authors.lastname: Turner
authors.forename: Ian M
authors.initials: IM
authors.lastname: Donaldson
authors.forename: Shoshana J
authors.initials: SJ
authors.lastname: Wodak
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D003628:Database Management Systems; D030562:Databases, Protein; D006801:Humans; D020407:Internet; D054730:Protein Interaction Domains and Motifs; D025941:Protein Interaction Mapping; D020033:Protein Isoforms; D011506:Proteins / Q000737:chemistry* / Q000378:metabolism*; D040901:Proteomics
chemical_list: D020033:Protein Isoforms; D011506:Proteins