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| | PROFILE Entry: QDOC50520 |
 | | The profile PS50521 corresponds to the segment of 100 - 150 aa of RdRp, which contains three motifs putatively forming the catalytic center. |
 | | Viruses whose RNA-directed RNA polymerases are described by the profile PS50521 are (see [2,3]): - All positive-strand RNA viruses with no DNA stage: Arteriviridae, Bromoviridae, Caliciviridae, Comoviridae, Coronaviridae, Flaviviridae, Leviviridae, Luteoviridae, Picornaviridae, Potyviridae, Togaviridae, Tombusviridae, Capilloviruses, Carlaviruses, Potexviruses, Tobamoviruses, Tobraviruses, Trichoviruses, Tymoviruses, Hepatitis E-like viruses, Allexivirus, Sobemovirus. |
 | | There are two families of RNA-containing bacteriophages: Leviviridae (positive ssRNA phages) and Cystoviridae (dsRNA phages). |
| www.isrec.isb-sib.ch /cgi-bin/get_qdoc?QDOC50520 (601 words) |
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