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Clustering of Zika Viruses Originating from Different Geographical Regions using Computational Sequence Descriptors

Author(s):

Marjan Vračko*, Subhash C. Basak, Dwaipayan Sen and Ashesh Nandy   Pages 1 - 9 ( 9 )

Abstract:


In this report we consider a data set, which consists of 310 Zika virus genome sequences taken from different continents, Africa, Asia and South America. The sequences, which were compiled from GenBank, were derived from the host cells of different mammalian species (Simiiformes, Aedes opok, Aedes africanus, Aedes luteocephalus, Aedes dalzieli, Aedes aegypti, and Homo sapiens). For chemometrical treatment the sequences have been represented by sequence descriptors derived from their graphs or neighborhood matrices. The set was analyzed with three chemometrical methods: Mahalanobis distances, principal component analysis (PCA) and self organizing maps (SOM). A good separation of samples with respect to the region of origin was observed using these three methods.

• Background: Study of 310 Zika virus genome sequences from different continents.

• Objective: To characterize and compare Zika virus sequences from around the world using alignment-free sequence comparison and chemometrical methods.

• Method: Mahalanobis distance analysis, self organizing maps, principal components were used to carry out the chemometrical analyses of the Zika sequence data.

• Results: Genome sequences are clustered with respect to the region of origin (continent, country)

• Conclusion: Africa samples are well separated from Asian and South American ones.

Keywords:

Zika virus, Geographical distribution, Clustering, Self-organizing map, Principal component analysis

Affiliation:

National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Centre for Interdisciplinary Research and Education, Kolkata, Centre for Interdisciplinary Research and Education, Kolkata



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