Young ND, Zaitlin M. An analysis of tobacco mosaic virus replicative structures synthesized in vitro.
PLANT MOLECULAR BIOLOGY 1986;
6:455-465. [PMID:
24307422 DOI:
10.1007/bf00027137]
[Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/1985] [Revised: 03/12/1986] [Accepted: 03/18/1986] [Indexed: 06/02/2023]
Abstract
The RNA structures synthesized in vitro by a crude enzyme complex from tobacco mosaic virus (TMV)-infected leaves have been analyzed; the major viral-specific products were similar to TMV-replicative form (RF) and-replicative intermediate (RI) in electrophoretic behavior and ribonuclease sensitivity. Synthesis of these RF-like and RI-like structures neither required nor responded to added viral RNA, but did require all four ribonucleotide triphosphates. Enriched radiolabeled RF-like and RI-like RNA fractions were isolated from non-denaturing agarose gels by electroelution and hybridized to a collection of TMV sequences cloned into bacteriophage M13. Enriched RF-RNA hybridized to sequences of both plus and minus polarity, while enriched RI-RNA hybridized only to inserts of minus polarity, indicating only plus strand synthesis in this fraction. Most of the label incorporated into the plus strand of the enriched RF-RNA was found near the 3'-end of this strand, while most of the label incorporated into enriched RI-RNA was found several hundred bases from the 5'-end of the plus strand.
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