Nucleic Acids Research, 1984, Vol. 12, No. 8 3427-3434
© 1984
MOLECULAR BIOLOGY |
Nucleotide sequence of cucumber pale fruit viroid: homology to hop stunt viroid
Department of Botany, Faculty of Agriculture, Hokkaido University Sapporo 060. Japan *Department of Biophysics and Biochemistry, Faculty of Science, University of Tokyo Hongo, Tokyo 113, Japan
Received March 13, 1984. Accepted March 30, 1984.
Double stranded cDNA of cucumber pale fruit viroid (CPFV) has been cloned by the method of Okayama and Berg (Mol.Cell.Biol.2,161170 (1982)) and the complete nucleotide sequence was established. The covalently closed circular molecules of single-stranded CPFV RNA consists of 303 nucleotides. The nucleotide sequence of CPFV was compared with the previously established sequence of hop stunt viroid (HSV), which consists of 297 nucleotides (Ohno et al. Nucleic Acid Res.11,61856197 (1983)). CPFV differs from HSV in the nucleotide sequence at 16 positions which include 8 exchanges, 7 insertions and 1 deletion. Both viroids share about 95% sequence homology. Considering the pathogenic properties of both viroids together, it is concluded that CPFV is a cucumber isolate of HSV.