title: Effects of aeration on the synthesis of poly(3-hydroxybutyrate) from glycerol and glucose in recombinant Escherichia coli.
abstract: Bioreactor cultures of Escherichia coli recombinants carrying phaBAC and phaP of Azotobacter sp. FA8 grown on glycerol under low-agitation conditions accumulated more poly(3-hydroxybutyrate) (PHB) and ethanol than at high agitation, while in glucose cultures, low agitation led to a decrease in PHB formation. Cells produced smaller amounts of acids from glycerol than from glucose. Glycerol batch cultures stirred at 125 rpm accumulated, in 24 h, 30.1% (wt/wt) PHB with a relative molecular mass of 1.9 MDa, close to that of PHB obtained using glucose.
authors.affiliation: Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, Av. Intendente Güiraldes 2160, C1428EGA Buenos Aires, Argentina.
authors.forename: Alejandra
authors.initials: A
authors.lastname: de Almeida
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Giordano
authors.forename: Pablo I
authors.initials: PI
authors.lastname: Nikel
authors.forename: M Julia
authors.initials: MJ
authors.lastname: Pettinari
mesh_terms: D000332:Aerobiosis; D001395:Azotobacter / Q000235:genetics; D019149:Bioreactors; D002264:Carboxylic Acids / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005947:Glucose / Q000378:metabolism*; D005990:Glycerol / Q000378:metabolism*; D006885:Hydroxybutyrates / Q000737:chemistry / Q000378:metabolism*; D008970:Molecular Weight; D011091:Polyesters / Q000737:chemistry / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics; D000094122:Polyhydroxybutyrates
chemical_list: D002264:Carboxylic Acids; D000431:Ethanol; D005947:Glucose; D005990:Glycerol; D006885:Hydroxybutyrates; D011091:Polyesters; D011994:Recombinant Proteins; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates