Key result
RNA-seq analysis reconstructs two pigeon gammacoronavirus genomes with unique organization supporting a novel species designation.
Why the study?
Far fewer gammacoronaviruses have been characterized compared to other coronavirus genera, leaving their diversity unclear, and pigeon gammacoronaviruses had only partial sequences determined.
Identifies pigeon gammacoronaviruses as a novel species within the subgenus Igacovirus, expanding knowledge of gammacoronavirus diversity.
Answers are grounded in this paper and cite their sources.
Reveals novel pigeon gammacoronavirus species; extends Igacovirus taxonomy but leaves open pathogenic and surveillance implications.
Most members of the genus Gammacoronavirus infect avian hosts, but far fewer viruses have been characterized than in the other coronavirus genera, leaving their diversity largely unclear. Pigeon gammacoronaviruses were previously detected by consensus PCR, but only partial sequences were determined. In this study, we comprehensively analyzed public RNA-seq datasets and reconstructed two nearly complete genomes of pigeon gammacoronaviruses. Molecular evolutionary analyses showed pigeon gammacoronaviruses belong to the subgenus Igacovirus , and their pairwise distances to the members of this subgenus meet the International Committee on Taxonomy of Viruses (ICTV) species demarcation criteria, supporting their designation as a novel species in this subgenus. Notably, although nucleotide sequences are highly conserved gammacoronaviruses, their 3′-genomic region exhibited differences in gene organization among pigeon coronavirus variants. These findings expand our knowledge of the diversity of gammacoronaviruses.
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Kobayashi et al. (2025) studied Pigeon gammacoronavirus (n=1,224). RNA-seq data analysis was evaluated on Reconstruction of nearly complete viral genomes. Analysis of public RNA-seq datasets reconstructed two nearly complete genomes of pigeon gammacoronaviruses, revealing a unique genome organization and supporting their designation as a novel species.
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