Self-cleavage of plus and minus RNA transcripts of avocado sunblotch viroid

Author(s): Hutchins CJ, Rathjen PD, Forster AC, Symons RH


Self-cleavage of both plus and minus RNA transcripts of the 247-residue avocado sunblotch viroid (ASBV), prepared from tandem dimeric cDNA clones, occurs specifically at two sites in each transcript to give monomeric plus and minus species. The cleavage reaction occurs both during transcription and on incubation of purified transcripts at pH 8 and 37 degrees C in the presence of magnesium ions to give a 3'-terminal 2',3'-cyclic phosphate and a 5'-terminal hydroxyl group. Although the self-cleavage occurs at different sites in the ASBV molecule for the plus and minus species, very similar secondary structures with high sequence homology can be drawn at each site. The results are considered to provide further evidence that ASBV is replicated in vivo by a rolling circle mechanism involving non-enzymic cleavage of high molecular weight RNA precursors of ASBV.

Similar Articles

Potato spindle tuber "virus"

Author(s): Diener TO

Inhibition of potato spindle tuber viroid (PSTVd) infection with DNA oligonucleotides

Author(s): Matousek J, Trnena L, Arnold L, Dedic P, Rakousky S, et al.

Behavior of a hammerhead ribozyme in aqueous solution at medium to high temperatures

Author(s): El-Murr N, Maurel MC, Rihova M, Vergne J, Hervé G, et al.

The revised classification of eukaryotes

Author(s): Adl SM, Simpson AG, Lane CE, Lukes J, Bass D, et al.

Improving the coverage of the cyanobacterial phylum using diversity-driven genome sequencing

Author(s): Shih PM, Wu D, Latifi A, Axen SD, Fewer DP, et al.

Accurate strand-specific quantification of viral RNA

Author(s): Plaskon NE, Adelman ZN, Myles KM