Utilize este identificador para referenciar este registo: http://hdl.handle.net/10451/10722
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degois.publication.firstPagee81450por
degois.publication.titlePLoS ONEpor
dc.contributor.authorFreire, João Miguel-
dc.contributor.authorVeiga, Ana Salomé-
dc.contributor.authorConceição, Thaís M.-
dc.contributor.authorKowalczyk, Wioleta-
dc.contributor.authorMohana-Borges, Ronaldo-
dc.contributor.authorAndreu, David-
dc.contributor.authorSantos, Nuno C.-
dc.contributor.authorPoian, Andrea T. da-
dc.contributor.authorCastanho, Miguel A. R. B.-
dc.date.accessioned2014-03-11T12:12:17Z-
dc.date.available2014-03-11T12:12:17Z-
dc.date.issued2013-
dc.identifier.citationPLOS One December 2013, Volume 8, Issue 12, e81450eng
dc.identifier.issn1932-6203-
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0081450-
dc.identifier.urihttp://hdl.handle.net/10451/10722-
dc.description© 2013 Freire et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.eng
dc.description.abstractSupercharged proteins are a recently identified class of proteins that have the ability to efficiently deliver functional macromolecules into mammalian cells. They were first developed as bioengineering products, but were later found in the human proteome. In this work, we show that this class of proteins with unusually high net positive charge is frequently found among viral structural proteins, more specifically among capsid proteins. In particular, the capsid proteins of viruses from the Flaviviridae family have all a very high net charge to molecular weight ratio (> +1.07/kDa), thus qualifying as supercharged proteins. This ubiquity raises the hypothesis that supercharged viral capsid proteins may have biological roles that arise from an intrinsic ability to penetrate cells. Dengue virus capsid protein was selected for a detailed experimental analysis. We showed that this protein is able to deliver functional nucleic acids into mammalian cells. The same result was obtained with two isolated domains of this protein, one of them being able to translocate lipid bilayers independently of endocytic routes. Nucleic acids such as siRNA and plasmids were delivered fully functional into cells. The results raise the possibility that the ability to penetrate cells is part of the native biological functions of some viral capsid proteins.eng
dc.description.sponsorshipThis work was supported by Fundação para a Ciência e Tecnologia – Ministério da Educação e Ciência (FCT-MEC, Portugal) [PTDC/QUI-BIQ/112929/2009], by the European Union [projects FP7-PEOPLE IRSES (MEMPEPACROSS) and FP7-HEALTH-F3-2008-223414 (LEISHDRUG)], by the Spanish Ministry of Economy and Competitiveness (SAF2011-24899), the Generalitat de Catalunya (2009 SGR 492), by the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnoloógico (CNPq), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), and the National Institute of Science and Technology in Dengue (INCT-Dengue). JMF also acknowledges FCT-MEC for Ph.D. fellowship SFRH/BD/70423/2010.eng
dc.language.isoengpor
dc.publisherPLOS - Public Library of Scienceeng
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/247513-
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/223414-
dc.rightsopenAccesspor
dc.titleIntracellular nucleic acid delivery by the supercharged dengue virus capsid proteineng
dc.typearticlepor
dc.peerreviewedyespor
degois.publication.volume8por
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