• Voprosy virusologii · Mar 2014

    [Taxonomy of previously unclassified Tamdy virus (TAMV) (Bunyaviridae, Nairovirus) isolated from the Hyalomma asiaticum asiaticum Schülce et Schlottke, 1929 (Ixodidae, Hyalomminae) in the Middle East and transcaucasia].

    • D K L'vov, S V Al'khovskiĭ, M Iu Shchelkanov, A M Shchetinin, V A Aristova, A K Gitel'man, P G Deriabin, and A G Botikov.
    • Vopr. Virusol. 2014 Mar 1; 59 (2): 15-22.

    AbstractComplete genome sequencing of three Tamdy (TAMV) virus strains was carried out. The prototype strain TAMV/LEIV-1308Uz was isolated for the very first time from the Hyalomma asiaticum asiaticum Schülce et Schlottke, 1929 (Ixodidae, Hyalomminae) collected in the August 1971 from sheep in the arid area near Namdybulak town (41 degrees 36' N, 64 degrees 39' E) in the Tamdinsky district of the Bukhara region (Uzbekistan). TAMV was revealed to be a prototype member of the new phylogenetic group within the limits of the Nairovirus. The TAMV homology for RdRp (L-segment) amino acid sequence is not less than 40% with Crimea-Congo hemorrhagic fever virus (CCHFV), Hazara virus (HAZV), and Dugbe virus (DUGV), which are also linked with Ixodidae ticks. The TAMV homologies with the Issyk-Kul virus (ISKV) and Caspiy virus (CASV) for RdRp are 37.6% and 37.7%, respectively. These data conformed to the low values of GnGc (M-segment) and nucleocapsid protein N (S-segment) homology. The TAMV homologies with the nairoviruses for GnGc is in average 25%; with the nairoviruses linked with Ixodidae ticks (CCHFV, DUGV, HAZV) - 33%; with Argasidae ticks (ISKV, CASV) - 28%. The TAMV/LEIV-1308Uz, LEIV-6158Ar, and LEIV-10226Az have high level of identity. The TAMV/LEIV-10226Az from Azerbaijan has 99% homology for both nucleotide and amino acid sequences of the prototype TAMV/LEIV-1308Uz RdRp. The TAMV/LEIV-6158Ar from Armenia is more divergent and has 94.2% and 96.3% homologies with the TAMV/LEIV-1308Uz, respectively. The homology between the TAMV/LEIV-1308Uz and TAMV/LEIV-10226Az for GnGc is 93%. The TAMV/LEIV-6158Ar has 90% homology for this protein with the TAMV/LEIV-1308Uz and 93% with the TAMV/LEIV-10226Az, respectively. Differences in nucleocapsid protein between three TAMV strains are 5-7%.

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