title: Phosphorus limitation strategy to increase propionic acid flux towards 3-hydroxyvaleric acid monomers in Cupriavidus necator.
abstract: Properties of polyhydroxybutyrate-co-hydroxyvalerate (P(3HB-co-3HV)) depend on their 3HV content. 3HV can be produced by Cupriavidus necator from propionic acid. Few studies explored carbon distribution and dynamics of 3HV and 3HB monomers production, and none of them have been done with phosphorus as limiting nutrient. In this study, fed-batch cultures of C. necator with propionic acid, as sole carbon source or mixed with butyric acid, were performed. Phosphorus deficiency allowed sustaining 3HV production rate and decreasing 3HB production rate, leading to an instant production of up to 100% of 3HV. When a residual growth is sustained by a phosphorus feeding, the maximum 3HV percentage produced from propionic acid is limited to 33% (Mole.Mole(-1)). The association of a second carbon source like butyric acid lead to higher conversion of propionic acid into 3HV. This study showed the importance of the limiting nutrient and of the culture strategy to get the appropriate product.
authors.affiliation: Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France; VEOLIA Environnement, Centre de Recherche sur l'Eau, Chemin de la Digue, BP 76, F-78603 Maisons-Laffitte Cedex, France. Electronic address: estelle.grousseau@insa-toulouse.fr.
authors.forename: Estelle
authors.initials: E
authors.lastname: Grousseau
authors.affiliation: Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France; VEOLIA Environnement, Centre de Recherche sur l'Eau, Chemin de la Digue, BP 76, F-78603 Maisons-Laffitte Cedex, France. Electronic address: blanchet.elise@gmail.com.
authors.forename: Elise
authors.initials: E
authors.lastname: Blanchet
authors.affiliation: VEOLIA Environnement, Centre de Recherche sur l'Eau, Chemin de la Digue, BP 76, F-78603 Maisons-Laffitte Cedex, France. Electronic address: stephane.deleris@veoliaeau.fr.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Déléris
authors.affiliation: VEOLIA Environnement, Centre de Recherche sur l'Eau, Chemin de la Digue, BP 76, F-78603 Maisons-Laffitte Cedex, France. Electronic address: Maria.ALBUQUERQUE@veolia.com.
authors.forename: Maria G E
authors.initials: MG
authors.lastname: Albuquerque
authors.affiliation: Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France. Electronic address: etienne.paul@insa-toulouse.fr.
authors.forename: Etienne
authors.initials: E
authors.lastname: Paul
authors.affiliation: Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France. Electronic address: uribelarrea@insa-toulouse.fr.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Uribelarrea
mesh_terms: D020155:3-Hydroxybutyric Acid / Q000378:metabolism; D061249:Batch Cell Culture Techniques; D020148:Butyric Acid / Q000378:metabolism; D002244:Carbon / Q000494:pharmacology; D003198:Computer Simulation; D020118:Cupriavidus necator / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D005232:Fatty Acids, Volatile / Q000378:metabolism; D053858:Metabolic Networks and Pathways / Q000187:drug effects; D009584:Nitrogen / Q000494:pharmacology; D010100:Oxygen / Q000494:pharmacology; D010421:Pentanoic Acids / Q000378:metabolism*; D010758:Phosphorus / Q000494:pharmacology*; D011422:Propionates / Q000378:metabolism*
chemical_list: D005232:Fatty Acids, Volatile; D010421:Pentanoic Acids; D011422:Propionates; C013056:beta-hydroxyvaleric acid; D020148:Butyric Acid; D010758:Phosphorus; D002244:Carbon; C029658:propionic acid; D009584:Nitrogen; D010100:Oxygen; D020155:3-Hydroxybutyric Acid
keywords: Cupriavidus necator; Phosphorus limitation; Polyhydroxybutyrate-co-hydroxyvalerate P(3HB-co-3HV); Propionic acid; Volatile fatty acids (VFA)