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Sequence determination and analysis of the full-length genome of colorado tick fever virus, the type species of genus Coltivirus (Family Reoviridae).

Biochemical and Biophysical Research Communications

Genome, Viral, Animals, DNA Primers, Cricetinae, genetics, Colorado tick fever virus, Cell Line, Base Sequence

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      Abstract

      The Colorado tick fever virus (CTFV) is the type species of genus Coltivirus, family Reoviridae. Its genome consisting of 12 segments of dsRNA was completely sequenced. It was found to be 29,174 nucleotides long (the longest of all Reoviridae genomes characterized to date). Conserved sequences at the 5' end (SACUUUUGY) and at the 3' end (WUGCAGUS) of the 12 segments were identified. The analysis of the putative proteins deduced from the nucleotide sequences permitted to identify functional motifs. In particular, the VP1 was identified unambiguously as the viral RNA dependent RNA pylmerase (RDRP) (VP1pol), with a GDD located at a similar position to Reoviridae RDRPs. In other genes, RGD cell-binding, NTPAse, single strand binding protein and kinase motifs were identified. Comparison with Reoviridae proteins showed significant similarities to RDRPs (CTFV-VP1) and sigma C protein of orthoreovirus (CTFV-VP6). Similarities to nonviral enzymatic proteins, such as methyltransferases, NTPAses, RNA replication factors, were also identified. Copyright 2000 Academic Press.

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      Journal
      10.1006/bbrc.2000.3057
      10891382

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