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Updated: Jun 2, 2026

Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 11, 2013
Physical and genomic characteristics identify chicken proventricular necrosis virus (R11/3 virus) as a novel
James S Guy1, A Melissa A West, Frederick J Fuller
1Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA. jim_guy@ncsu.edu
Abstract:
Chicken proventricular necrosis virus (CPNV), isolate R11/3, previously was isolated from transmissible viral proventriculitis-affected chickens and was determined to be the likely etiology of this disease. CPNV was identified as a birnavirus on the basis of virion size and morphology (icosahedral, approximately 75 nm in diameter, nonenveloped); buoyant density in cesium chloride (1.32 g/ml); a genome comprising bisegmented, double-stranded RNA (approximately 3.8 and 3.4 kilobase pairs); and nucleotide sequence analyses. Nucleotide sequencing of CPNV RNA, segment B, identified a single large open reading frame that encodes a 903-amino acid protein. The 903-amino acid protein was identified as the putative VP1, the viral RNA-dependent RNA polymerase (RdRp), on the basis of sequence homologies with other birnavirus VP1 proteins. The CPNV VP1 possessed the unique permuted RdRp sequence motif arrangement characteristic of birnaviruses; however, phylogenetic analyses based on VP1 demonstrated that CPNV is deeply divergent from other birnaviruses.
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