Nucleotide sequence of beet cryptic virus 3 dsRNA2 which encodes a putative RNA-dependent RNA polymerase.

The nucleotide sequence of a DNA copy of beet cryptic virus 3 double-stranded RNA2 was determined, and one strand was found to contain a single long open reading frame of 1431 nucleotides which encoded a putative polypeptide containing 478 amino acid residues with an M(r) of 54.9K. This polypeptide contained conserved amino acid sequence motifs found in the genes that encode putative RNA-dependent RNA polymerases of other RNA viruses.