title: Improving the prediction of protein secondary structure in three and eight classes using recurrent neural networks and profiles.
abstract: Secondary structure predictions are increasingly becoming the workhorse for several methods aiming at predicting protein structure and function. Here we use ensembles of bidirectional recurrent neural network architectures, PSI-BLAST-derived profiles, and a large nonredundant training set to derive two new predictors: (a) the second version of the SSpro program for secondary structure classification into three categories and (b) the first version of the SSpro8 program for secondary structure classification into the eight classes produced by the DSSP program. We describe the results of three different test sets on which SSpro achieved a sustained performance of about 78% correct prediction. We report confusion matrices, compare PSI-BLAST to BLAST-derived profiles, and assess the corresponding performance improvements. SSpro and SSpro8 are implemented as web servers, available together with other structural feature predictors at: http://promoter.ics.uci.edu/BRNN-PRED/.
authors.affiliation: Department of Information and Computer Science, Institute for Genomics and Bioinformatics, University of California, Irvine, Irvine, California 92697-3425, USA.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Pollastri
authors.forename: Darisz
authors.initials: D
authors.lastname: Przybylski
authors.forename: Burkhard
authors.initials: B
authors.lastname: Rost
authors.forename: Pierre
authors.initials: P
authors.lastname: Baldi
mesh_terms: D000465:Algorithms; D000818:Animals; D030562:Databases, Protein; D020407:Internet; D016571:Neural Networks, Computer; D017433:Protein Structure, Secondary; D011506:Proteins / Q000737:chemistry* / Q000145:classification
chemical_list: D011506:Proteins