método para obtenção de 1-questose

abstract the present invention discloses an industrial scale method to obtain 1-kestose by the use of a recombinant fructosyltransferase (ftf), isolated from festuca arundinacea, expressed constitutively in a non-saccharolytic yeast. in this invention, the recombinant ftf type sucrose:sucrose 1-fruc...

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Hauptverfasser: DUNIESKY MARTINEZ GARCIA, LÁZARO HERNANDEZ GARCIA, ENRIQUE ROSENDO PEREZ CRUZ, ALINA SOBRINO LEGÓN, RICARDO RAMIRES IBANEZ, GUMERSINDO FEIJOO COSTA, LUIS ENRIQUE TRUJILLO TOLEDO, JUAN MANUEL LEMA RODICIO, CARMEN MENENDEZ RODRIGUEZ
Format: Patent
Sprache:por
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Zusammenfassung:abstract the present invention discloses an industrial scale method to obtain 1-kestose by the use of a recombinant fructosyltransferase (ftf), isolated from festuca arundinacea, expressed constitutively in a non-saccharolytic yeast. in this invention, the recombinant ftf type sucrose:sucrose 1-fructosyltransferase (1-sstrec) is produced constitutively, stable and at high yield, both in the culture supernatant and in intact cells of the host pichia pastoris. hence, the invention additionally provides a method for 1-sst production at industrial scale. the recombinant enzyme is then used for mass production of short-chain fructooligosaccharides (fos), specifically 1-kestose, from sucrose. the method of the present invention establishes conditions that allow conversion rates where the synthesized fos constitute above 55% (w/w) of the total sugars in the reaction mixture and the 1-kestose content reaches values higher than 90% (w/w) of the total fos fraction. tradução do resumo resumo patente de invenção: "método para obtenção de 1-questose". a presente invenção divulga um método de obtenção de 1-questose, em escala industrial, mediante o uso de uma fructosiltransferase recombinante (ftf), isolada de festuca arundinacea, expressa constitutivamente em uma levedura hospedeira não sacarolítica. na invenção, a ftf recombinante tipo sacarose:sacarose 1-fructosiltransferase (1-sstrec) é produzida de forma constitutiva, estável e em níveis elevados, tanto no sobrenadante quanto no sedimento celular da cultura de uma cepa de pichia pastoris. portanto, a invenção também oferece um método para a obtenção de 1-sst em escala industrial. a enzima recombinante resultante é então empregada para a produção enzimática em massa de fruto-oligossacarídeos (fos), especificamente 1-questose, a partir de sacarose. o método da invenção permite conversões em fos superiores a 55%, com a 1-questose estando representada em mais de 90%. The present invention discloses an industrial scale method to obtain 1-kestose by the use of a recombinant fructosyltransferase (FTF), isolated from Festuca arundinacea, expressed constitutively in a non-saccharolytic yeast. In this invention, the recombinant FTF type sucrose:sucrose 1-fructosyltransferase (1-SSTrec) is produced constitutively, stable and at high yield, both in the culture supernatant and in intact cells of the host Pichia pastoris. Hence, the invention additionally provides a method for 1-SST production at industrial scale. The recombinan