title: Predict Gram-Positive and Gram-Negative Subcellular Localization via Incorporating Evolutionary Information and Physicochemical Features Into Chou's General PseAAC.
abstract: In this study, we used structural and evolutionary based features to represent the sequences of gram-positive and gram-negative subcellular localizations. To do this, we proposed a normalization method to construct a normalize Position Specific Scoring Matrix (PSSM) using the information from original PSSM. To investigate the effectiveness of the proposed method we compute feature vectors from normalize PSSM and by applying support vector machine (SVM) and naïve Bayes classifier, respectively, we compared achieved results with the previously reported results. We also computed features from original PSSM and normalized PSSM and compared their results. The archived results show enhancement in gram-positive and gram-negative subcellular localizations. Evaluating localization for each feature, our results indicate that employing SVM and concatenating features (amino acid composition feature, Dubchak feature (physicochemical-based features), normalized PSSM based auto-covariance feature and normalized PSSM based bigram feature) have higher accuracy while employing naïve Bayes classifier with normalized PSSM based auto-covariance feature proves to have high sensitivity for both benchmarks. Our reported results in terms of overall locative accuracy is 84.8% and overall absolute accuracy is 85.16% for gram-positive dataset; and, for gram-negative dataset, overall locative accuracy is 85.4% and overall absolute accuracy is 86.3%.
authors.forename: Ronesh
authors.initials: R
authors.lastname: Sharma
authors.forename: Abdollah
authors.initials: A
authors.lastname: Dehzangi
authors.forename: James
authors.initials: J
authors.lastname: Lyons
authors.forename: Kuldip
authors.initials: K
authors.lastname: Paliwal
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Tsunoda
authors.forename: Alok
authors.initials: A
authors.lastname: Sharma
mesh_terms: D001499:Bayes Theorem; D006090:Gram-Negative Bacteria / Q000737:chemistry / Q000166:cytology / Q000302:isolation & purification*; D006094:Gram-Positive Bacteria / Q000737:chemistry / Q000166:cytology / Q000302:isolation & purification*; D042541:Intracellular Space / Q000737:chemistry*; D015233:Models, Statistical; D060388:Support Vector Machine