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Article

TBEV Subtyping in Terms of Genetic Distance

1
Laboratory of Molecular Biology and Biochemistry, Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119048 Moscow, Russia
2
Department of Organization and Technology of Immunobiological Preparations, Institute for Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
3
Laboratory of Biology of Arboviruses, Chumakov Institute of Poliomyelitis and Viral Encephalitides (FSBSI “Chumakov FSC R&D IBP RAS), 108819 Moscow, Russia
4
Martsinovsky Institute of Medical Parasitology, Tropical and Vector Borne Diseases, Sechenov First Moscow State Medical University, 119435 Moscow, Russia
5
Department of Virology, Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
*
Author to whom correspondence should be addressed.
Viruses 2020, 12(11), 1240; https://doi.org/10.3390/v12111240
Received: 10 October 2020 / Revised: 24 October 2020 / Accepted: 29 October 2020 / Published: 31 October 2020
(This article belongs to the Special Issue Emerging Arboviruses)
Currently, the lowest formal taxon in virus classification is species; however, unofficial lower-level units are commonly used in everyday work. Tick-borne encephalitis virus (TBEV) is a species of mammalian tick-borne flaviviruses that may cause encephalitis. Many known representatives of TBEV are grouped into subtypes, mostly according to their phylogenetic relationship. However, the emergence of novel sequences could dissolve this phylogenetic grouping; in the absence of strict quantitative criterion, it may be hard to define the borders of the first TBEV taxonomic unit below the species level. In this study, the nucleotide/amino-acid space of all known TBEV sequences was analyzed. Amino-acid sequence p-distances could not reliably distinguish TBEV subtypes. Viruses that differed by less than 10% of nucleotides in the polyprotein-coding gene belonged to the same subtype. At the same time, more divergent viruses were representatives of different subtypes. According to this distance criterion, TBEV species may be divided into seven subtypes: TBEV-Eur, TBEV-Sib, TBEV-FE, TBEV-2871 (TBEV-Ob), TBEV-Him, TBEV-178-79 (TBEV-Bkl-1), and TBEV-886-84 (TBEV-Bkl-2). View Full-Text
Keywords: TBEV; taxonomy; subtypes; pairwise genetic distance TBEV; taxonomy; subtypes; pairwise genetic distance
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MDPI and ACS Style

Deviatkin, A.A.; Karganova, G.G.; Vakulenko, Y.A.; Lukashev, A.N. TBEV Subtyping in Terms of Genetic Distance. Viruses 2020, 12, 1240. https://doi.org/10.3390/v12111240

AMA Style

Deviatkin AA, Karganova GG, Vakulenko YA, Lukashev AN. TBEV Subtyping in Terms of Genetic Distance. Viruses. 2020; 12(11):1240. https://doi.org/10.3390/v12111240

Chicago/Turabian Style

Deviatkin, Andrei A., Galina G. Karganova, Yulia A. Vakulenko, and Alexander N. Lukashev. 2020. "TBEV Subtyping in Terms of Genetic Distance" Viruses 12, no. 11: 1240. https://doi.org/10.3390/v12111240

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