Ultrafiltration of supercoiled plasmid DNA : modeling and application
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/15099 |
Resumo: | A mass transfer model is proposed for predicting sieving coefficients, Sobs, of supercoiled plasmid DNA (pDNA), in the presence of a salt, in membranes with narrow pores, i.e., pores smaller than the gyration radii of the plasmids to be considered for a certain application. The model assumes that permeation occurs due to plasmid suction at the membrane surface as a result of the convective flow, being the probability of permeation also dependent on the instantaneous molecular conformation of the plasmid, when getting close to the pore. Two different approaches are tested to model plasmid structure, that of a closed segmented chains (CSC) of double stranded DNA, and that of considering the superhelical chain as a freely jointed chains (FJC). Both approaches were used to estimate the radius of gyration, rg, of different plasmids by statistical simulation, and the obtained values were compared with experimental data available in the literature. A 6050 bp plasmid, pVAX1-LacZ, was used in the experimental work, in which filtration tests were performed using three different ultrafiltration membranes of known pore size, in a 10 ml stirred cell. At constant ionic strength, sieving coefficients were determined as a function of the permeate flux, Jv, at two different values of stirring speed, ω. The results are in very good agreement with the model predictions at the highest stirring speed and the observed deviations found at the lowest stirring speed were interpreted with the aid of the developed model by considering the possibility of plasmid adsorption. Then, it was investigated the effect of changing the ionic strength of the medium at constant Jv and ω. The obtained results clearly agree with the model predictions. |
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Ultrafiltration of supercoiled plasmid DNA : modeling and applicationUltrafiltrationPlasmid DNAMonte Carlo simulationsSieving coefficientsModelingScience & TechnologyA mass transfer model is proposed for predicting sieving coefficients, Sobs, of supercoiled plasmid DNA (pDNA), in the presence of a salt, in membranes with narrow pores, i.e., pores smaller than the gyration radii of the plasmids to be considered for a certain application. The model assumes that permeation occurs due to plasmid suction at the membrane surface as a result of the convective flow, being the probability of permeation also dependent on the instantaneous molecular conformation of the plasmid, when getting close to the pore. Two different approaches are tested to model plasmid structure, that of a closed segmented chains (CSC) of double stranded DNA, and that of considering the superhelical chain as a freely jointed chains (FJC). Both approaches were used to estimate the radius of gyration, rg, of different plasmids by statistical simulation, and the obtained values were compared with experimental data available in the literature. A 6050 bp plasmid, pVAX1-LacZ, was used in the experimental work, in which filtration tests were performed using three different ultrafiltration membranes of known pore size, in a 10 ml stirred cell. At constant ionic strength, sieving coefficients were determined as a function of the permeate flux, Jv, at two different values of stirring speed, ω. The results are in very good agreement with the model predictions at the highest stirring speed and the observed deviations found at the lowest stirring speed were interpreted with the aid of the developed model by considering the possibility of plasmid adsorption. Then, it was investigated the effect of changing the ionic strength of the medium at constant Jv and ω. The obtained results clearly agree with the model predictions.Fundação para a Ciência e a Tecnologia (FCT)ElsevierUniversidade do MinhoMorão, A.Nunes, J. C.Sousa, FaniAmorim, M. T. Pessoa deEscobar, I. C.Queiroz, J. A.2011-08-152011-08-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/15099eng0376-738810.1016/j.memsci.2011.05.017info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:48:10Zoai:repositorium.sdum.uminho.pt:1822/15099Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:46:21.138024Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
title |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
spellingShingle |
Ultrafiltration of supercoiled plasmid DNA : modeling and application Morão, A. Ultrafiltration Plasmid DNA Monte Carlo simulations Sieving coefficients Modeling Science & Technology |
title_short |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
title_full |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
title_fullStr |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
title_full_unstemmed |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
title_sort |
Ultrafiltration of supercoiled plasmid DNA : modeling and application |
author |
Morão, A. |
author_facet |
Morão, A. Nunes, J. C. Sousa, Fani Amorim, M. T. Pessoa de Escobar, I. C. Queiroz, J. A. |
author_role |
author |
author2 |
Nunes, J. C. Sousa, Fani Amorim, M. T. Pessoa de Escobar, I. C. Queiroz, J. A. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Morão, A. Nunes, J. C. Sousa, Fani Amorim, M. T. Pessoa de Escobar, I. C. Queiroz, J. A. |
dc.subject.por.fl_str_mv |
Ultrafiltration Plasmid DNA Monte Carlo simulations Sieving coefficients Modeling Science & Technology |
topic |
Ultrafiltration Plasmid DNA Monte Carlo simulations Sieving coefficients Modeling Science & Technology |
description |
A mass transfer model is proposed for predicting sieving coefficients, Sobs, of supercoiled plasmid DNA (pDNA), in the presence of a salt, in membranes with narrow pores, i.e., pores smaller than the gyration radii of the plasmids to be considered for a certain application. The model assumes that permeation occurs due to plasmid suction at the membrane surface as a result of the convective flow, being the probability of permeation also dependent on the instantaneous molecular conformation of the plasmid, when getting close to the pore. Two different approaches are tested to model plasmid structure, that of a closed segmented chains (CSC) of double stranded DNA, and that of considering the superhelical chain as a freely jointed chains (FJC). Both approaches were used to estimate the radius of gyration, rg, of different plasmids by statistical simulation, and the obtained values were compared with experimental data available in the literature. A 6050 bp plasmid, pVAX1-LacZ, was used in the experimental work, in which filtration tests were performed using three different ultrafiltration membranes of known pore size, in a 10 ml stirred cell. At constant ionic strength, sieving coefficients were determined as a function of the permeate flux, Jv, at two different values of stirring speed, ω. The results are in very good agreement with the model predictions at the highest stirring speed and the observed deviations found at the lowest stirring speed were interpreted with the aid of the developed model by considering the possibility of plasmid adsorption. Then, it was investigated the effect of changing the ionic strength of the medium at constant Jv and ω. The obtained results clearly agree with the model predictions. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-08-15 2011-08-15T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/15099 |
url |
http://hdl.handle.net/1822/15099 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0376-7388 10.1016/j.memsci.2011.05.017 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133032310898688 |