cressdnaviricota cressdnaviricota 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. 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. nevertheless, all cressdnaviruses for which structural information is available appear to contain the jelly-roll fold. cressdnaviricota virions of maize streak virus virus classification (unranked): virus realm: monodnaviria kingdom: shotokuvirae phylum: cressdnaviricota classes see text taxonomy the following classes are recognized: arfiviricetes repensiviricetes