Detection and phylogenetic analysis of group 1 coronaviruses in South American bats - PubMed (original) (raw)

Detection and phylogenetic analysis of group 1 coronaviruses in South American bats

Christine V F Carrington et al. Emerg Infect Dis. 2008 Dec.

Abstract

Bat coronaviruses (Bt-CoVs) are thought to be the precursors of severe acute respiratory syndrome coronavirus. We detected Bt-CoVs in 2 bat species from Trinidad. Phylogenetic analysis of the RNA-dependent RNA polymerase gene and helicase confirmed them as group 1 coronaviruses.

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Figures

Figure 1

Figure 1

Maximum likelihood trees of coronaviruses based on A) 780-bp fragment of the RNA-dependent RNA polymerase gene and B) 1,797 bp of the helicase (HEL) domain of open reading frame 1b. Trees were inferred under the General Time Reversible (GTR + Γ4 + I) model by using PAUP* version 4.0b (Sinauer Associates, Inc., Sunderland, MA, USA). Bootstrap support values >90% are indicated. Previously defined phylogenetic groups and a putative novel group (10) are delineated by the bars on the right. The numbering of these groups is as described in the eighth report of the International Committee on Taxonomy of Viruses with the alternative grouping proposed by Tang et al_._ (4) in brackets. Trinidadian bat coronavirus sequences are highlighted in red. GenBank accession numbers are noted in parentheses. Scale bars indicate number of nucleotide substitutions per site.

Figure 2

Figure 2

Maximum likelihood tree of coronaviruses based on 378-bp fragment of the RNA-dependent RNA polymerase gene. The tree was inferred under the General Time Reversible (GTR + Γ4 + I) by using PAUP* version 4.0b (Sinauer Associates, Inc., Sunderland, MA, USA). Trinidadian bat coronavirus (Bt-CoV) sequences are highlighted in red and North American Bt-CoV in blue. Previously defined phylogenetic groups and a putative novel group (10) are delineated by the bars on the right. The numbering of these groups is as described in the eighth report of the International Committee on Taxonomy of Viruses with the alternative grouping proposed by Tang et al_._ (4) in brackets. Bootstrap support values for groups 1a, 1b, 2a–c, 3, and the lineage containing Trinidadian Bt-CoVs are shown. GenBank accession numbers are noted in parentheses. Scale bar indicates number of nucleotide substitutions per site.

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