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. 1996 Dec;70(12):9013–9017. doi: 10.1128/jvi.70.12.9013-9017.1996

The 5' ends of Thogoto virus (Orthomyxoviridae) mRNAs are homogeneous in both length and sequence.

C Albo 1, J Martín 1, A Portela 1
PMCID: PMC191002  PMID: 8971034

Abstract

Thogoto (THO) virus is a tick-borne member of the Orthomyxoviridae whose genome consists of six segments of linear, negative sense, single-stranded RNA. To gain insight into the mechanism by which viral mRNA transcripts are initiated, poly(A)+ RNA isolated from THO virus-infected cells was characterized by (i) primer extension experiments, (ii) immunoprecipitation studies with an anticap monoclonal antibody, (iii) direct sequencing analysis of the isolated RNA, and (iv) cloning and sequencing of individual mRNA molecules. The results indicated that THO virus mRNAs are capped and homogeneous in both length and sequence at their 5' end. These findings contrast with the situation found in all other segmented, negative sense or ambisense, single-stranded RNA viruses so far analyzed in which the 5' ends of viral mRNAs are heterogeneous in length and sequence. These results are discussed in terms of the mechanism used by THO virus to initiate mRNA synthesis.

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Selected References

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