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A potentially novel overlapping gene in the genomes of Israeli acute paralysis virus and its relatives

Niv Sabath email, Nicholas Price email and Dan Graur email

Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA

author email corresponding author email

Virology Journal 2009, 6:144doi:10.1186/1743-422X-6-144

Published: 17 September 2009

Abstract

The Israeli acute paralysis virus (IAPV) is a honeybee-infecting virus that was found to be associated with colony collapse disorder. The IAPV genome contains two genes encoding a structural and a nonstructural polyprotein. We applied a recently developed method for the estimation of selection in overlapping genes to detect purifying selection and, hence, functionality. We provide evolutionary evidence for the existence of a functional overlapping gene, which is translated in the +1 reading frame of the structural polyprotein gene. Conserved orthologs of this putative gene, which we provisionally call pog (predicted overlapping gene), were also found in the genomes of a monophyletic clade of dicistroviruses that includes IAPV, acute bee paralysis virus, Kashmir bee virus, and Solenopsis invicta (red imported fire ant) virus 1.


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