A new Aura virus isolate in Brazil shows segment duplication in the variable region of the nsP3 gene

Parasites & Vectors
Ana Luiza Pamplona MosimannClaudia Nunes Duarte Dos Santos

Abstract

A new isolate of Aura virus serendipitously discovered as a cell culture contaminant is reported in this manuscript. Aura virus belongs to the family Togaviridae and is classified in the genus Alphavirus. There are only two reports of Aura virus isolation from mosquitoes in the scientific literature, and the existence of a vertebrate host is still unknown. The discovery of this new isolate was based on transmission electron microscopy and nucleic acid amplification through a non-specific RT-PCR amplification protocol followed by sequencing. Genetic analysis has shown that the new virus shares a high degree of identity with the previously described isolate (GenBank: AF126284.1). A major difference was observed in the nsP3 gene in which a 234-nucleotide duplication has been identified. Furthermore, a pronounced difference was observed in cell cultures compared to the data available for the previously described isolate. Cell permissiveness and phenotypic characteristics in C6/36, Vero and BHK-21 cells were found to differ from previous reports. This may be due to the genetic differences that have been observed. The genetic and biological characteristics of the new Aura virus isolate are suggestive of viral adaptation to the cell s...Continue Reading

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Citations

Jun 13, 2020·PLoS Neglected Tropical Diseases·John Christian HustedtNeal Alexander
Jun 27, 2019·Emerging Microbes & Infections·Marcel Kruchelski TscháClaudia Nunes Duarte Dos Santos

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Datasets Mentioned

BETA
AF126284.1
MG761767

Methods Mentioned

BETA
flow cytometry
transmission electron microscopy
Fluorescence
co-immunoprecipitation
pull-down
PCR

Software Mentioned

phrap
consed
MrBayes
MEGA
Leica Application Suite Advanced Fluorescence
Basic Local Alignment Search Tool ( BLAST )
phred
BLAST

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