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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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 |
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