Members of the family Pospiviroidae have single-stranded circular RNA genomes that adopt a rod-like or a quasi-rod-like conformation. These genomes contain a central conserved region that is involved in replication in the nucleus through an asymmetric RNA–RNA rolling-circle mechanism. Members of the family Pospiviroidae lack the hammerhead ribozymes that are typical of viroids classified in the family Avsunviroidae . The family Pospiviroidae includes the genera Apscaviroid , Cocadviroid , Coleviroid , Hostuviroid and Pospiviroid , with &25 species. This is a summary of the ICTV Report on the family Pospiviroidae , which is available at ictv.global/report/pospiviroidae .
展开▼
