Characterization of a novel papillomavirus identified from a whale (Delphinapterus leucas) pharyngeal metagenomic library

• Published in: Virology Journal
• Main Authors: Xiang Lu, Rong Zhu, Ziyuan Dai
• Format: Article in Journal/Newspaper
• Language: English
• Published: BMC 2023
• Subjects: Whale; Virome; Papillomavirus; Gene recombination; Infectious and parasitic diseases; RC109-216; Delphinapterus leucas
• Online Access: https://doi.org/10.1186/s12985-023-02009-y; https://doaj.org/article/2e25b4d7f7864afeb1b9aec924961eb7

Abstract Here, using viral metagenomic method, a novel whale papillomavirus (temporarily named wPV, GenBank accession number OP856597) was discovered in a whale (Delphinapterus leucas) pharyngeal metagenomic library. The complete genome size of wPV is 7179 bp, with GC content of 54.4% and a nucleotide composition of 23.4% A, 22.3% T, 28.4% G, and 25.9% C. The viral genome has a typical papillomavirus organization pattern, and five ORFs were predicted, including two late genes encoding L1 and L2, and three early genes encoding E1, E2, and E6. Pairwise sequence comparison and phylogenetic analysis based on the L1 gene sequence indicated that wPV may be a novel species within genus Dyodeltapapillomavirus. In addition, the E2 region of wPV was predicted to have a potential recombination event. The discovery of this novel papillomavirus increases our understanding of the viral ecology of marine mammals, providing insights into possible future infectious diseases.