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. 2022 May;167(5):1355-1359.
doi: 10.1007/s00705-022-05423-9. Epub 2022 Mar 21.

Identification and genomic characterization of a novel porcine CRESS DNA virus from a pig suffering from diarrhea in China

Tian-Ning Liu #  1 , Cong-Xi Liu #  1 , Jing-Ying Liao  1 , Wei-Jie Xiong  1 , Jun-Yong Xia  1 , Chao-Ting Xiao  2
Affiliations

Identification and genomic characterization of a novel porcine CRESS DNA virus from a pig suffering from diarrhea in China

Tian-Ning Liu et al. Arch Virol. 2022 May.

Abstract

The circular replication-associated protein (Rep)-encoding ssDNA (CRESS-DNA) viruses show high diversity and have a very wide range of hosts, including all three domains of cellular life. In the present study, a novel CRESS DNA virus, provisionally named "kirkovirus HNU-XX-2020" was discovered in a growing pig with watery diarrhea. The virus has a circular genome of 2961 nucleotides (nt) and three major putative open reading frames (ORFs), encoding a Rep protein (327 amino acids), a capsid protein (175 amino acids), and one protein (209 amino acids) of unknown function. The genome showed the highest sequence similarity (68.6% identity) to the genome of porcine circo-like virus 51 (JF713719), which was identified in pig faeces, and it showed very limited sequence similarity (less than 40% identity) to other virus genomes. Further phylogenetic analysis suggested that it could be a novel member in the proposed family "Kirkoviridae".

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