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<dc:title xml:lang="en">Reverse genetic studies of Benyvirus Polymyxa betae molecular interaction : role of the RNA4-encoded protein in virus transmission</dc:title>
<dcterms:alternative xml:lang="fr">Étude des interactions Benyvirus-Polymyxa betae par génétique inverse,rôle de la protéine codée par l'ARN4 dans la transmission</dcterms:alternative>
<dc:subject xml:lang="fr">Benyvirus</dc:subject>
<dc:subject xml:lang="fr"> transmission</dc:subject>
<dc:subject xml:lang="fr"> Polumyxa betae</dc:subject>
<dc:subject xml:lang="fr"> trans-replication</dc:subject>
<dc:subject xml:lang="fr"> betterave sucrée</dc:subject>
<dc:subject xml:lang="fr"> BNYVV</dc:subject>
<dc:subject xml:lang="fr"> BSBMV</dc:subject>
<dc:subject xml:lang="en">Benyvirus ; transmission ; Polumyxa betae ; trans-replication ; sugar beet ; BNYVV ; BSBMV</dc:subject>
<dc:subject xsi:type="dcterms:DDC">572.8</dc:subject>
<dc:subject xsi:type="dcterms:DDC">579.2</dc:subject>
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<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="05012403X">Virologie agricole</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les virus Beet soil-borne mosaic virus (BSBMV) et Beet necrotic yellow vein virus (BNYVV, agent de la Rhizomanie) font partie du genre Benyvirus. Des clones d'ADNc infectieux de BSBMV ont été obtenus et ont permis d'entreprendre l'étude des interactions moléculaires entre plante et Benyvirus sur les bases des différences biologiques des deux virus. Les transcrits infectieux de BSBMV peuvent substituer ceux du BNYVV et ainsi produire des recombinants chimériques.La transmission par Polymyxa betae est liée à la présence de l'ARN4 et un ARN4 de 1730 nts de BSBMV, non encore décrit, a été caractérisé. Nous avons démontré que cet ARN4 pouvait remplacer celui du BNYVV lors de la transmission et que seule l'expression de la protéine p32 suffit à la transmission du virus. La mutagenèse de la protéine p32 étiquetée a été réalisée et a permis de rechercher les domaines essentiels à ses fonctions.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Beet soil-borne mosaic virus (BSBMV) and Beet necrotic yellow vein virus (BNYVV, responsible for Rhizomania disease) belong to the Benyvirus genus. BSBMV full-length cDNA clones were produced to investigate molecular interactions between plant and benyviruses exploiting BSBMV/BNYVV biological and molecular divergences. BSBMV Full-length infectious cDNA clones can substitute BNYVV RNA-1 or -2 to produce chimeric viral progenies. Virus transmission by Polymyxa betae is directly linked to the viral RNA4 and a 1,730 nts long BSBMV RNA4, not previously described, has been molecularly characterized. We demonstrated that BSBMV RNA4 could substitute BNYVV RNA4 for an efficient transmission. Replicon mediated expression of the BSBMV p32 protein complemented RNA4 defective strain demonstrating for the first time that the p32 protein but not full-length RNA4 is essential for Benyvirus transmission. Mutagenesis or Flag or GFP-tagged p32 has been to investigate the domains of BSBMV p32 protein essential for its properties.</dcterms:abstract>
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<dcterms:spatial xml:lang="fr">France</dcterms:spatial>
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<tef:nom>Université de Strasbourg</tef:nom>
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<tef:nom>D'Alonzo</tef:nom>
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<tef:thesis.degree.discipline xml:lang="fr">Aspects moléculaires et cellulaires de la biologie</tef:thesis.degree.discipline>
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<tef:nom>Université de Strasbourg</tef:nom>
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<tef:nom>Gilmer</tef:nom>
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<tef:nom>Rubies Autonell</tef:nom>
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