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Processing of linear longer-than-unit-length potato spindle tuber viroid RNAs into infectious monomeric circular molecules by a G-specific endoribonuclease
- Source :
- Virology. 190:746-753
- Publication Year :
- 1992
- Publisher :
- Elsevier BV, 1992.
-
Abstract
- Different cDNA constructs were used for the in vitro synthesis of RNA transcripts that contain a complete monomeric unit of the potato spindle tuber viroid (PSTVd) plus an additional repeat of a part of the circular RNA genome. These permutated linear longer-than-unit-length PSTVd RNAs were incubated with the G-specific endoribonuclease RNase T1 which generated monomeric circular PSTVd RNA molecules that were infectious when mechanically inoculated to tomato plants. Besides the correct monomeric PSTVd RNA, smaller and larger circular RNAs were also formed during the reaction. The comparison of different transcripts revealed that correct in vitro processing of PSTVd RNA can proceed at alternative sites indicating that circularization is driven by RNA structure and not governed by a particular sequence. Based on these data, we propose a novel model for the processing of multimeric replicative viroid RNA intermediates through RNA cleavage and ligation catalyzed by a host endoribonuclease.
- Subjects :
- Base Sequence
biology
RNase P
Viroid
Molecular Sequence Data
Endoribonuclease
Ribonuclease T1
food and beverages
RNA
RNA, Circular
biology.organism_classification
Molecular biology
Viroids
Plant Viruses
Biochemistry
Circular RNA
Virology
Endoribonucleases
RNA, Viral
Electrophoresis, Gel, Two-Dimensional
RNA Cleavage
Potato spindle tuber viroid
Plasmids
Subjects
Details
- ISSN :
- 00426822
- Volume :
- 190
- Database :
- OpenAIRE
- Journal :
- Virology
- Accession number :
- edsair.doi.dedup.....6c19c5d2a670b2a44b799360e55ebf4d