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Arch Virol. 1999;144(4):797-803.

In vitro evidence for RNA binding properties of the coat protein of prunus necrotic ringspot ilarvirus and their comparison to related and unrelated viruses.

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Departamento de Mejora y Patología Vegetal, CEBAS (CSIC), Murcia, Spain.


The RNA binding properties of the prunus necrotic ringspot virus (PNRSV) coat protein (CP) were demonstrated by northwestern and dot-blot analyses. The capability to bind PNRSV RNA 4 was compared with viruses representing three different interactions prevailing in the assembly and architecture of virions. The results showed that cucumber mosaic virus (CMV) and PNRSV CPs, which stabilise their virions mainly through RNA-protein interactions bound PNRSV RNA 4 even at very high salt concentrations. The CP of cherry leaf roll nepovirus, whose virions are predominantly stabilised by protein-protein interactions did not bind even at the lowest salt concentration tested. Finally the CP of carnation mottle carmovirus, that has an intermediate position in which both RNA-protein and protein-protein interactions are equally important showed a salt-dependent RNA binding.

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