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Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus

Agarose gel electrophoresis, circular dichroism and differential scanning calorimetry showed that single-stranded RNA from satellite tobacco mosaic virus transforms from a conformationally ‘closed state’ at 4°C to a more conformationally ‘open state’ at 65°C. The transition is reversible and shows n...

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Autores principales: Kuznetsov, Yuri G., Dowell, Jeffrey J., Gavira, José A., Ng, Joseph D., McPherson, Alexander
Formato: Texto
Lenguaje:English
Publicado: Oxford University Press 2010
Materias:
RNA
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3001053/
https://www.ncbi.nlm.nih.gov/pubmed/20693537
http://dx.doi.org/10.1093/nar/gkq662
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author Kuznetsov, Yuri G.
Dowell, Jeffrey J.
Gavira, José A.
Ng, Joseph D.
McPherson, Alexander
author_facet Kuznetsov, Yuri G.
Dowell, Jeffrey J.
Gavira, José A.
Ng, Joseph D.
McPherson, Alexander
author_sort Kuznetsov, Yuri G.
collection PubMed
description Agarose gel electrophoresis, circular dichroism and differential scanning calorimetry showed that single-stranded RNA from satellite tobacco mosaic virus transforms from a conformationally ‘closed state’ at 4°C to a more conformationally ‘open state’ at 65°C. The transition is reversible and shows no hysteresis. Atomic force microscopy (AFM) allowed visualization of the two states and indicated that the conformationally ‘closed state’ probably corresponds to the native encapsidated conformation, and that the ‘open state’ represents a conformation, characterized as short, thick chains of domains, as a consequence of the loss of tertiary interactions. Heating from 75°C to 85°C in the presence of EDTA was necessary to further unravel the ‘open’ conformation RNA into extended chains of lengths >280 nm. Virus exposed to low concentrations of phenol at 65°C, extruded RNA as distinctive ‘pigtails’ in a synchronous fashion, and these ‘pigtails’ then elongated, as the RNA was further discharged by the particles. Moderate concentrations of phenol at 65°C produced complete disruption of virions and only remains of decomposed particles and disordered RNA were evident. AFM images of RNA emerging from disrupted virions appear most consistent with linear arrangements of structural domains.
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spelling pubmed-30010532010-12-13 Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus Kuznetsov, Yuri G. Dowell, Jeffrey J. Gavira, José A. Ng, Joseph D. McPherson, Alexander Nucleic Acids Res RNA Agarose gel electrophoresis, circular dichroism and differential scanning calorimetry showed that single-stranded RNA from satellite tobacco mosaic virus transforms from a conformationally ‘closed state’ at 4°C to a more conformationally ‘open state’ at 65°C. The transition is reversible and shows no hysteresis. Atomic force microscopy (AFM) allowed visualization of the two states and indicated that the conformationally ‘closed state’ probably corresponds to the native encapsidated conformation, and that the ‘open state’ represents a conformation, characterized as short, thick chains of domains, as a consequence of the loss of tertiary interactions. Heating from 75°C to 85°C in the presence of EDTA was necessary to further unravel the ‘open’ conformation RNA into extended chains of lengths >280 nm. Virus exposed to low concentrations of phenol at 65°C, extruded RNA as distinctive ‘pigtails’ in a synchronous fashion, and these ‘pigtails’ then elongated, as the RNA was further discharged by the particles. Moderate concentrations of phenol at 65°C produced complete disruption of virions and only remains of decomposed particles and disordered RNA were evident. AFM images of RNA emerging from disrupted virions appear most consistent with linear arrangements of structural domains. Oxford University Press 2010-12 2010-08-06 /pmc/articles/PMC3001053/ /pubmed/20693537 http://dx.doi.org/10.1093/nar/gkq662 Text en © The Author(s) 2010. Published by Oxford University Press. http://creativecommons.org/licenses/by-nc/2.5 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle RNA
Kuznetsov, Yuri G.
Dowell, Jeffrey J.
Gavira, José A.
Ng, Joseph D.
McPherson, Alexander
Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title_full Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title_fullStr Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title_full_unstemmed Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title_short Biophysical and atomic force microscopy characterization of the RNA from satellite tobacco mosaic virus
title_sort biophysical and atomic force microscopy characterization of the rna from satellite tobacco mosaic virus
topic RNA
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3001053/
https://www.ncbi.nlm.nih.gov/pubmed/20693537
http://dx.doi.org/10.1093/nar/gkq662
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