New mannoprotein with full solubility in wine and its...

C - Chemistry – Metallurgy – 07 – K

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Details

C07K 14/39 (2006.01) C12H 1/00 (2006.01) C12P 21/00 (2006.01)

Patent

CA 2589901

The present invention describes a novel mannoprotein obtainable by a process comprising: a) subjecting a suspension of yeast cells to enzymatic hydrolysis whereby said yeast cells are degraded and mannoprotein and other yeast components are solubilised and released from the degraded yeast cells; b) recovering the solubilised mannoprotein, and optionally c) treating the recovered mannoprotein with a basic solution at a pH of at least 9. The novel mannoprotein is very soluble in wine and can be very effective in stabilising wine against tartrate precipitation or protein haze formation.

La présente invention se rapporte à une nouvelle mannoprotéine, qui peut être produite à l'aide d'un procédé consistant : a) à procéder à l'hydrolyse enzymatique d'une suspension de cellules de levure, ce qui permet de dégrader ces dernières et de solubiliser la mannoprotéine et les autres composants de la levure et de les libérer des cellules de levure dégradées ; b) à récupérer la mannoprotéine solubilisée ; et éventuellement c) à traiter la mannoprotéine récupérée avec une solution basique présentant un pH d'au moins 9. La nouvelle mannoprotéine est très soluble dans le vin, et peut stabiliser très efficacement ce dernier pour éviter toute précipitation de tartrate ou formation de trouble protéique.

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