Ontology highlight
ABSTRACT: Motivation
N-linked glycosylation occurs predominantly at the N-X-T/S motif, where X is any amino acid except proline. Not all N-X-T/S sequons are glycosylated, and a number of web servers for predicting N-linked glycan occupancy using sequence and/or residue pattern information have been developed. None of the currently available servers, however, utilizes protein structural information for the prediction of N-glycan occupancy.Results
Here, we describe a novel classifier algorithm, NGlycPred, for the prediction of glycan occupancy at the N-X-T/S sequons. The algorithm utilizes both structural as well as residue pattern information and was trained on a set of glycosylated protein structures using the Random Forest algorithm. The best predictor achieved a balanced accuracy of 0.687 under 10-fold cross-validation on a curated dataset of 479 N-X-T/S sequons and outperformed sequence-based predictors when evaluated on the same dataset. The incorporation of structural information, including local contact order, surface accessibility/composition and secondary structure thus improves the prediction accuracy of glycan occupancy at the N-X-T/S consensus sequon.Availability and implementation
NGlycPred is freely available to non-commercial users as a web-based server at http://exon.niaid.nih.gov/nglycpred/.
SUBMITTER: Chuang GY
PROVIDER: S-EPMC3426846 | biostudies-literature | 2012 Sep
REPOSITORIES: biostudies-literature
Chuang Gwo-Yu GY Boyington Jeffrey C JC Joyce M Gordon MG Zhu Jiang J Nabel Gary J GJ Kwong Peter D PD Georgiev Ivelin I
Bioinformatics (Oxford, England) 20120710 17
<h4>Motivation</h4>N-linked glycosylation occurs predominantly at the N-X-T/S motif, where X is any amino acid except proline. Not all N-X-T/S sequons are glycosylated, and a number of web servers for predicting N-linked glycan occupancy using sequence and/or residue pattern information have been developed. None of the currently available servers, however, utilizes protein structural information for the prediction of N-glycan occupancy.<h4>Results</h4>Here, we describe a novel classifier algorit ...[more]