Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis
- Autores
- Nikel, P.I.; Pettinari, M.J.; Galvagno, M.A.; Méndez, B.S.
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We assessed the effects of different arcA mutations on poly(3- hydroxybutyrate) (PHB) synthesis in recombinant Escherichia coli strains carrying the pha synthesis genes from Azotobacter sp. strain FA8. The arcA mutations used were an internal deletion and the arcA2 allele, a leaky mutation for some of the characteristics of the Arc phenotype which confers high respiratory capacity. PHB synthesis was not detected in the wild-type strain in shaken flask cultures under low-oxygen conditions, while ArcA mutants gave rise to polymer accumulation of up to 24% of their cell dry weight. When grown under microaerobic conditions in a bioreactor, the arcA deletion mutant reached a PHB content of 27% ± 2%. Under the same conditions, higher biomass and PHB concentrations were observed for the strain bearing the arcA2 allele, resulting in a PHB content of 35% ± 3%. This strain grew in a simple medium at a specific growth rate of 0.69 ± 0.07 h-1, whereas the deletion mutant needed several nutritional additives and snowed a specific growth rate of 0.56 ± 0.06 h-1. The results presented here suggest that arcA mutations could play a role in heterologous PHB synthesis in microaerobiosis. Copyright © 2006, American Society for Microbiology. All Rights Reserved.
Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Galvagno, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Méndez, B.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. - Fuente
- Appl. Environ. Microbiol. 2006;72(4):2614-2620
- Materia
-
Biomass
Cell culture
Escherichia coli
Mutagenesis
Strain
Synthesis (chemical)
ArcA mutants
Leaky mutation
Microaerobiosis
Poly(3-hydroxybutyrate) synthesis
Organic polymers
poly(3 hydroxybutyric acid)
bacteriology
gene
mutagenicity
recombination
aerobic metabolism
allele
arcA gene
arcA2 gene
article
Azotobacter
Azotobacter FA8
bacterial gene
bacterial growth
bacterial strain
biomass
bioreactor
dry weight
Escherichia coli
gene deletion
gene mutation
nonhuman
pha gene
phenotype
synthesis
wild type
Aerobiosis
Bacterial Outer Membrane Proteins
Biomass
Culture Media
Escherichia coli
Escherichia coli Proteins
Gene Expression Regulation, Bacterial
Hydroxybutyrates
Mutation
Polyesters
Recombination, Genetic
Repressor Proteins
Arca
Azotobacter
Bacteria (microorganisms)
Escherichia coli - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/2.5/ar
- Repositorio
- Institución
- Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
- OAI Identificador
- paperaa:paper_00992240_v72_n4_p2614_Nikel
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Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosisNikel, P.I.Pettinari, M.J.Galvagno, M.A.Méndez, B.S.BiomassCell cultureEscherichia coliMutagenesisStrainSynthesis (chemical)ArcA mutantsLeaky mutationMicroaerobiosisPoly(3-hydroxybutyrate) synthesisOrganic polymerspoly(3 hydroxybutyric acid)bacteriologygenemutagenicityrecombinationaerobic metabolismallelearcA genearcA2 genearticleAzotobacterAzotobacter FA8bacterial genebacterial growthbacterial strainbiomassbioreactordry weightEscherichia coligene deletiongene mutationnonhumanpha genephenotypesynthesiswild typeAerobiosisBacterial Outer Membrane ProteinsBiomassCulture MediaEscherichia coliEscherichia coli ProteinsGene Expression Regulation, BacterialHydroxybutyratesMutationPolyestersRecombination, GeneticRepressor ProteinsArcaAzotobacterBacteria (microorganisms)Escherichia coliWe assessed the effects of different arcA mutations on poly(3- hydroxybutyrate) (PHB) synthesis in recombinant Escherichia coli strains carrying the pha synthesis genes from Azotobacter sp. strain FA8. The arcA mutations used were an internal deletion and the arcA2 allele, a leaky mutation for some of the characteristics of the Arc phenotype which confers high respiratory capacity. PHB synthesis was not detected in the wild-type strain in shaken flask cultures under low-oxygen conditions, while ArcA mutants gave rise to polymer accumulation of up to 24% of their cell dry weight. When grown under microaerobic conditions in a bioreactor, the arcA deletion mutant reached a PHB content of 27% ± 2%. Under the same conditions, higher biomass and PHB concentrations were observed for the strain bearing the arcA2 allele, resulting in a PHB content of 35% ± 3%. This strain grew in a simple medium at a specific growth rate of 0.69 ± 0.07 h-1, whereas the deletion mutant needed several nutritional additives and snowed a specific growth rate of 0.56 ± 0.06 h-1. The results presented here suggest that arcA mutations could play a role in heterologous PHB synthesis in microaerobiosis. Copyright © 2006, American Society for Microbiology. All Rights Reserved.Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Galvagno, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Méndez, B.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00992240_v72_n4_p2614_NikelAppl. Environ. Microbiol. 2006;72(4):2614-2620reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-04T09:48:47Zpaperaa:paper_00992240_v72_n4_p2614_NikelInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-04 09:48:48.712Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse |
dc.title.none.fl_str_mv |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
title |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
spellingShingle |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis Nikel, P.I. Biomass Cell culture Escherichia coli Mutagenesis Strain Synthesis (chemical) ArcA mutants Leaky mutation Microaerobiosis Poly(3-hydroxybutyrate) synthesis Organic polymers poly(3 hydroxybutyric acid) bacteriology gene mutagenicity recombination aerobic metabolism allele arcA gene arcA2 gene article Azotobacter Azotobacter FA8 bacterial gene bacterial growth bacterial strain biomass bioreactor dry weight Escherichia coli gene deletion gene mutation nonhuman pha gene phenotype synthesis wild type Aerobiosis Bacterial Outer Membrane Proteins Biomass Culture Media Escherichia coli Escherichia coli Proteins Gene Expression Regulation, Bacterial Hydroxybutyrates Mutation Polyesters Recombination, Genetic Repressor Proteins Arca Azotobacter Bacteria (microorganisms) Escherichia coli |
title_short |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
title_full |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
title_fullStr |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
title_full_unstemmed |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
title_sort |
Poly(3-hydroxybutyrate) synthesis by recombinant Escherichia coli arcA mutants in microaerobiosis |
dc.creator.none.fl_str_mv |
Nikel, P.I. Pettinari, M.J. Galvagno, M.A. Méndez, B.S. |
author |
Nikel, P.I. |
author_facet |
Nikel, P.I. Pettinari, M.J. Galvagno, M.A. Méndez, B.S. |
author_role |
author |
author2 |
Pettinari, M.J. Galvagno, M.A. Méndez, B.S. |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Biomass Cell culture Escherichia coli Mutagenesis Strain Synthesis (chemical) ArcA mutants Leaky mutation Microaerobiosis Poly(3-hydroxybutyrate) synthesis Organic polymers poly(3 hydroxybutyric acid) bacteriology gene mutagenicity recombination aerobic metabolism allele arcA gene arcA2 gene article Azotobacter Azotobacter FA8 bacterial gene bacterial growth bacterial strain biomass bioreactor dry weight Escherichia coli gene deletion gene mutation nonhuman pha gene phenotype synthesis wild type Aerobiosis Bacterial Outer Membrane Proteins Biomass Culture Media Escherichia coli Escherichia coli Proteins Gene Expression Regulation, Bacterial Hydroxybutyrates Mutation Polyesters Recombination, Genetic Repressor Proteins Arca Azotobacter Bacteria (microorganisms) Escherichia coli |
topic |
Biomass Cell culture Escherichia coli Mutagenesis Strain Synthesis (chemical) ArcA mutants Leaky mutation Microaerobiosis Poly(3-hydroxybutyrate) synthesis Organic polymers poly(3 hydroxybutyric acid) bacteriology gene mutagenicity recombination aerobic metabolism allele arcA gene arcA2 gene article Azotobacter Azotobacter FA8 bacterial gene bacterial growth bacterial strain biomass bioreactor dry weight Escherichia coli gene deletion gene mutation nonhuman pha gene phenotype synthesis wild type Aerobiosis Bacterial Outer Membrane Proteins Biomass Culture Media Escherichia coli Escherichia coli Proteins Gene Expression Regulation, Bacterial Hydroxybutyrates Mutation Polyesters Recombination, Genetic Repressor Proteins Arca Azotobacter Bacteria (microorganisms) Escherichia coli |
dc.description.none.fl_txt_mv |
We assessed the effects of different arcA mutations on poly(3- hydroxybutyrate) (PHB) synthesis in recombinant Escherichia coli strains carrying the pha synthesis genes from Azotobacter sp. strain FA8. The arcA mutations used were an internal deletion and the arcA2 allele, a leaky mutation for some of the characteristics of the Arc phenotype which confers high respiratory capacity. PHB synthesis was not detected in the wild-type strain in shaken flask cultures under low-oxygen conditions, while ArcA mutants gave rise to polymer accumulation of up to 24% of their cell dry weight. When grown under microaerobic conditions in a bioreactor, the arcA deletion mutant reached a PHB content of 27% ± 2%. Under the same conditions, higher biomass and PHB concentrations were observed for the strain bearing the arcA2 allele, resulting in a PHB content of 35% ± 3%. This strain grew in a simple medium at a specific growth rate of 0.69 ± 0.07 h-1, whereas the deletion mutant needed several nutritional additives and snowed a specific growth rate of 0.56 ± 0.06 h-1. The results presented here suggest that arcA mutations could play a role in heterologous PHB synthesis in microaerobiosis. Copyright © 2006, American Society for Microbiology. All Rights Reserved. Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Galvagno, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Méndez, B.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
description |
We assessed the effects of different arcA mutations on poly(3- hydroxybutyrate) (PHB) synthesis in recombinant Escherichia coli strains carrying the pha synthesis genes from Azotobacter sp. strain FA8. The arcA mutations used were an internal deletion and the arcA2 allele, a leaky mutation for some of the characteristics of the Arc phenotype which confers high respiratory capacity. PHB synthesis was not detected in the wild-type strain in shaken flask cultures under low-oxygen conditions, while ArcA mutants gave rise to polymer accumulation of up to 24% of their cell dry weight. When grown under microaerobic conditions in a bioreactor, the arcA deletion mutant reached a PHB content of 27% ± 2%. Under the same conditions, higher biomass and PHB concentrations were observed for the strain bearing the arcA2 allele, resulting in a PHB content of 35% ± 3%. This strain grew in a simple medium at a specific growth rate of 0.69 ± 0.07 h-1, whereas the deletion mutant needed several nutritional additives and snowed a specific growth rate of 0.56 ± 0.06 h-1. The results presented here suggest that arcA mutations could play a role in heterologous PHB synthesis in microaerobiosis. Copyright © 2006, American Society for Microbiology. All Rights Reserved. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/20.500.12110/paper_00992240_v72_n4_p2614_Nikel |
url |
http://hdl.handle.net/20.500.12110/paper_00992240_v72_n4_p2614_Nikel |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/2.5/ar |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
Appl. Environ. Microbiol. 2006;72(4):2614-2620 reponame:Biblioteca Digital (UBA-FCEN) instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales instacron:UBA-FCEN |
reponame_str |
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collection |
Biblioteca Digital (UBA-FCEN) |
instname_str |
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales |
instacron_str |
UBA-FCEN |
institution |
UBA-FCEN |
repository.name.fl_str_mv |
Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales |
repository.mail.fl_str_mv |
ana@bl.fcen.uba.ar |
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