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RNA/RNA interactions involved in the regulation of Benyviridae viral cicle

Abstract : Multipartite RNA virus condition to provide a complete set of genomic segments in each infected cell implies a high level of MOI that results in an unsustainable biological cost in terms of viral replication. In the proposed model, to minimize the cost of the genome integrity preservation, a network of RNA/RNA interactions determines the recognition and the mobilization of at least one of each genomic RNAs in a modular RNP complex. Such complex must be considered as the mobile infectious unit of the segmented genome during viral spread in the plant. The Aim of this thesis was to experimentally determine the existence of RNA/RNA interactions between BNYVV RNAs and their implication in the viral cycle. BNYVV genomic segments have been co-detected within isolated single cells from systemic tissues where they accumulate to reach set point genome formulas. In the model where vRNAs interact each other to form the minimal mobile infective unit, RNA1 and RNA2 interaction domain has been identified in silico and in vitro. The rationale of such an interaction has been provided in vivo using BNYVV and Beet soil-borne mosaic virus chimeras.
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Submitted on : Friday, February 1, 2019 - 11:55:00 AM
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Mattia Dall'Ara. RNA/RNA interactions involved in the regulation of Benyviridae viral cicle. Vegetal Biology. Université de Strasbourg; Università degli studi (Bologne, Italie), 2018. English. ⟨NNT : 2018STRAJ019⟩. ⟨tel-02003448⟩



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