For Permissions, please e-mail: firstname.lastname@example.org, Fast detection of differential chromatin domains with SCIDDO, pdm_utils: a SEA-PHAGES MySQL phage database management toolkit, Casboundary: Automated definition of integral Cas cassettes, An iterative approach to detect pleiotropy and perform mendelian randomization analysis using GWAS summary statistics, Deep feature extraction of single-cell transcriptomes by generative adversarial network, https://doi.org/10.1093/bioinformatics/btv472, Receive exclusive offers and updates from Oxford Academic, Board Certified or Board Eligible AP/CP Full-Time or Part-Time Pathologist, Chief of ID, VA Ann Arbor Healthcare System. Let Ωk=(Σk)−1denote the inverse covariance matrix (also called precision matrix), which indicates the residue or column interaction (or co-evolution) pattern in this protein family. Evaluating DCA-based method performances for RNA contact prediction by a well-curated data set. Residue EC analysis is a pure sequence-based, unsupervised method that predicts contacts by detecting coevolved residues from the multiple sequence alignment (MSA) of a single protein family. Thanks to high-throughput sequencing and better statistical and optimization techniques, evolutionary coupling (EC) analysis for contact prediction has made good progress, which makes de novo prediction of some large proteins possible (Hopf et al., 2012; Marks et al., 2011; Nugent and Jones, 2012; Skwark et al., 2013). protein-interaction partners". Non-evolutionary information such as residue contact potential described in (Tan et al., 2006). See paper (Wang and Xu, 2013) for more details. Our joint EC analysis predicts contacts in a target family by analyzing residue co-evolution information in a set of related protein families which may share similar contact maps. Please enable it to take advantage of the complete set of features! Gaussian Direct Coupling Analysis for protein contacts predicion. A simple majority voting scheme performs worse than the single-family EC methods. That is, if these two column pairs are highly conserved, Ωj1,j3k1and Ωj2,j4k2 shall also be highly correlated. Experiments show that the combination of joint EC analysis with supervised machine learning can significantly improve contact prediction, and that our method even outperforms single-family EC analysis on protein families with a large number of sequence homologs. (, Weigt Protein complexes: structure prediction challenges for the 21st century. (, Jones Both evolutionary coupling (EC) analysis and supervised machine learning methods have been developed, making use of different information sources. Supplementary information:Supplementary data are available at Bioinformatics online. Structure-based enzyme engineering improves donor-substrate recognition of Arabidopsis thaliana glycosyltransferases. We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. C. T.A. Accurate prediction of peptide binding sites on protein surfaces. This improved … S. Our method outperforms the others on these datasets in terms of both medium- and long-range accuracy. J. We trained and selected the model parameters of our Random Forests model by 5-fold cross validation. Existing contact prediction methods belong to roughly two categories: (i) EC analysis methods, such as (Burger and van Nimwegen, 2010; Di Lena et al., 2011; Marks et al., 2011), that make use of multiple sequence alignment; and (ii) supervised machine learning methods, such as SVMSEQ (Wu and Zhang, 2008), NNcon (Tegge et al., 2009), SVMcon (Cheng and Baldi, 2007), CMAPpro (Di Lena et al., 2012), that predict contacts from a variety of information including mutual information and sequence profiles. We show that deep learning, even trained by only intra-protein contact maps, works … We use Random Forests, a popular supervised learning method, to predict the probability of two residues forming a contact from a variety of protein features. In this article, we present a new method CoinDCA (coestimation of inverse matrices for direct-coupling analysis) for contact prediction that conducts joint multifamily EC analysis through group graphical lasso (GGL) (Danaher et al., 2014), which is an extension of the graphical lasso formulation employed by PSICOV (Jones et al., 2012). The code is written in Julia and requires julia version When neither auxiliary families nor supervised learning is used, CoinDCA is exactly the same as PSICOV. (, Hopf In this case, i.e. The Σkcalculated by (1) is an empirical covariance matrix, which can be treated as an estimation of the true covariance matrix. J. This Gaussian assumption holds only when the family contains a large number of sequence homologs. et al. In the protein community, it has emerged in the last decade the idea of exploiting the covariance of mutations within a family to predict the protein structure using the direct-coupling-analysis (DCA) method. P. That is, even a remotely-related protein family may provide information useful for contact prediction. Biomed Res Int.
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