See text Cressdnaviricota is a phylum of viruses with small, circular single-stranded DNA genomes and encoding rolling circle replication-initiation proteins with the N-terminal HUH endonuclease and C-terminal superfamily 3 helicase domains.

[1][2] While the replication-associated proteins are homologous among viruses within the phylum, the capsid proteins are very diverse and have presumably been acquired from RNA viruses on multiple independent occasions.

[3][4][5][6] Nevertheless, all cressdnaviruses for which structural information is available appear to contain the jelly-roll fold.

[5][6] The following classes are recognized:

This virus-related article is a stub.