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Machine learning using intrinsic genomic signatures for rapid classification of novel pathogens: COVID-19 case study
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Machine learning using intrinsic genomic signatures for rapid classification of novel pathogens: COVID-19 case study
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Journal Article
Machine learning using intrinsic genomic signatures for rapid classification of novel pathogens: COVID-19 case study
2020
Overview
The 2019 novel coronavirus (renamed SARS-CoV-2, and generally referred to as the COVID-19 virus) has spread to 184 countries with over 1.5 million confirmed cases. Such major viral outbreaks demand early elucidation of taxonomic classification and origin of the virus genomic sequence, for strategic planning, containment, and treatment. This paper identifies an intrinsic COVID-19 virus genomic signature and uses it together with a machine learning-based alignment-free approach for an ultra-fast, scalable, and highly accurate classification of whole COVID-19 virus genomes. The proposed method combines supervised machine learning with digital signal processing (MLDSP) for genome analyses, augmented by a decision tree approach to the machine learning component, and a Spearman's rank correlation coefficient analysis for result validation. These tools are used to analyze a large dataset of over 5000 unique viral genomic sequences, totalling 61.8 million bp, including the 29 COVID-19 virus sequences available on January 27, 2020. Our results support a hypothesis of a bat origin and classify the COVID-19 virus as Sarbecovirus, within Betacoronavirus. Our method achieves 100% accurate classification of the COVID-19 virus sequences, and discovers the most relevant relationships among over 5000 viral genomes within a few minutes, ab initio, using raw DNA sequence data alone, and without any specialized biological knowledge, training, gene or genome annotations. This suggests that, for novel viral and pathogen genome sequences, this alignment-free whole-genome machine-learning approach can provide a reliable real-time option for taxonomic classification.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Betacoronavirus - classification
/ Biology
/ Computer and Information Sciences
/ Coronavirus Infections - epidemiology
/ Coronavirus Infections - virology
/ COVID-19
/ DNA
/ Genes
/ Genomes
/ Genomics
/ Humans
/ Learning
/ Mammals
/ Medicine and Health Sciences
/ Mutation
/ Pneumonia, Viral - epidemiology
/ Proteins
/ Rankings
/ Research and Analysis Methods
/ Severe acute respiratory syndrome coronavirus 2
/ Strategic planning (Business)
/ Taxonomy
/ Viruses
/ Zoonoses
