RNA-Dependent RNA Polymerase

**Definition:** An enzyme that catalyses RNA-template-directed extension of the 3'- end of an RNA strand by one nucleotide at a time, and can initiate a chain de novo. (Enzyme Nomenclature, 1992, p293)

**Tree numbers:** - D08.811.913.696.445.735.780

**Synonyms:** - RNA Replicase - Nucleoside-Triphosphate:RNA Nucleotidyltransferase (RNA-directed) - RNA-Directed RNA Polymerase - RNA-Dependent RNA Replicase