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2016 ; 93
(ä): 84-91
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Integrated protein function prediction by mining function associations,
sequences, and protein-protein and gene-gene interaction networks
#MMPMID26370280
Cao R
; Cheng J
Methods
2016[Jan]; 93
(ä): 84-91
PMID26370280
show ga
MOTIVATIONS: Protein function prediction is an important and challenging problem
in bioinformatics and computational biology. Functionally relevant biological
information such as protein sequences, gene expression, and protein-protein
interactions has been used mostly separately for protein function prediction. One
of the major challenges is how to effectively integrate multiple sources of both
traditional and new information such as spatial gene-gene interaction networks
generated from chromosomal conformation data together to improve protein function
prediction. RESULTS: In this work, we developed three different probabilistic
scores (MIS, SEQ, and NET score) to combine protein sequence, function
associations, and protein-protein interaction and spatial gene-gene interaction
networks for protein function prediction. The MIS score is mainly generated from
homologous proteins found by PSI-BLAST search, and also association rules between
Gene Ontology terms, which are learned by mining the Swiss-Prot database. The SEQ
score is generated from protein sequences. The NET score is generated from
protein-protein interaction and spatial gene-gene interaction networks. These
three scores were combined in a new Statistical Multiple Integrative Scoring
System (SMISS) to predict protein function. We tested SMISS on the data set of
2011 Critical Assessment of Function Annotation (CAFA). The method performed
substantially better than three base-line methods and an advanced method based on
protein profile-sequence comparison, profile-profile comparison, and domain
co-occurrence networks according to the maximum F-measure.
|Data Mining/*methods
[MESH]
|Databases, Protein
[MESH]
|Gene Regulatory Networks/*genetics
[MESH]
|Protein Interaction Domains and Motifs/*genetics
[MESH]