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Title: CryoProtect: A Web Server for Classifying Antifreeze Proteins from Nonantifreeze Proteins
Authors: Reny Pratiwi
Aijaz Ahmad Malik
Nalini Schaduangrat
Virapong Prachayasittikul
Jarl E.S. Wikberg
Chanin Nantasenamat
Watshara Shoombuatong
Mahidol University
Setia Budi University
Uppsala Biomedicinska Centrum
Keywords: Chemistry
Issue Date: 1-Jan-2017
Citation: Journal of Chemistry. Vol.2017, (2017)
Abstract: © 2017 Reny Pratiwi et al. Antifreeze protein (AFP) is an ice-binding protein that protects organisms from freezing in extremely cold environments. AFPs are found across a diverse range of species and, therefore, significantly differ in their structures. As there are no consensus sequences available for determining the ice-binding domain of AFPs, thus the prediction and characterization of AFPs from their sequence is a challenging task. This study addresses this issue by predicting AFPs directly from sequence on a large set of 478 AFPs and 9,139 non-AFPs using machine learning (e.g., random forest) as a function of interpretable features (e.g., amino acid composition, dipeptide composition, and physicochemical properties). Furthermore, AFPs were characterized using propensity scores and important physicochemical properties via statistical and principal component analysis. The predictive model afforded high performance with an accuracy of 88.28% and results revealed that AFPs are likely to be composed of hydrophobic amino acids as well as amino acids with hydroxyl and sulfhydryl side chains. The predictive model is provided as a free publicly available web server called CryoProtect for classifying query protein sequence as being either AFP or non-AFP. The data set and source code are for reproducing the results which are provided on GitHub.
ISSN: 20909071
Appears in Collections:Scopus 2016-2017

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