RNA-directed RNA polymerase involved in viral RNA replication. Protease: Thiol protease that cleaves the polyprotein. ATP + H2O = ADP + H(+) + phosphate a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate + RNA(n+1) Binds 1 Fe(2+) ion per subunit. Specific enzymatic cleavages by the viral protease yield mature proteins. Belongs to the potexviruses/carlaviruses RNA replication protein family.