Novel sucrose unassimilating flocculent yeast

Patent metadata

Field	Value
Publication number	US-2016108438-A1
Application number	US-201414888603-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	May 9, 2013
Publication date	Apr 21, 2016
Grant date	—

Abstract

An object of the present invention is to provide a sucrose unassimilating yeast which has a flocculation ability and has much of a proven performance of food production. The present invention pertains to a yeast strain expressed by accession number: NITE BP-1587.

First claim

1 . A yeast strain expressed by accession number: NITE BP-1587.

2 . A yeast strain expressed by accession number: NITE BP-1588.

3 . (canceled)

4 . The yeast strain according to claim 1 , wherein the yeast is employed for a method of producing sugar and ethanol comprising a step of fermenting sugar liquid derived from a plant with yeast.

5 . The yeast strain according to claim 2 , wherein the yeast is employed for a method of producing sugar and ethanol comprising a step of fermenting sugar liquid derived from a plant with yeast.

6 . The yeast strain according to claim 1 , wherein the yeast is employed for a method of producing sugar and ethanol comprising steps of:
removing non-sugar components contained in sugar liquid derived from a plant to clarify the sugar liquid; and adding yeast to the clarified sugar liquid to carry out ethanol fermentation at a given temperature under an anaerobic condition for an appropriate length of time.

7 . The yeast strain according to claim 2 , wherein the yeast is employed for a method of producing sugar and ethanol comprising steps of:
removing non-sugar components contained in sugar liquid derived from a plant to clarify the sugar liquid; and adding yeast to the clarified sugar liquid to carry out ethanol fermentation at a given temperature under an anaerobic condition for an appropriate length of time.

8 . A method of producing sugar and ethanol comprising a step of fermenting sugar liquid derived from a plant with the yeast strain according to claim 1 .

9 . A method of producing sugar and ethanol comprising a step of fermenting sugar liquid derived from a plant with the yeast strain according to claim 2 .

10 . A method of producing sugar and ethanol comprising steps of:
removing non-sugar components contained in sugar liquid derived from a plant to clarify the sugar liquid; and adding the yeast strain according to claim 1 to the clarified sugar liquid to carry out ethanol fermentation at a given temperature under an anaerobic condition for an appropriate length of time.

11 . A method of producing sugar and ethanol comprising steps of:
removing non-sugar components contained in sugar liquid derived from a plant to clarify the sugar liquid; and adding the yeast strain according to claim 2 to the clarified sugar liquid to carry out ethanol fermentation at a given temperature under an anaerobic condition for an appropriate length of time.

12 . A yeast strain obtained by a breeding method comprising:
subjecting a yeast strain expressed by accession number NBRC 10055 and a yeast strain expressed by accession number NITE BP-1589 to spore isolation to acquire an isolated spore showing type a or type α as a mating type; mating the isolated spore of NBRC 10055 and the isolated spore of NITE BP-1589 which have different mating types to create a mated strain; carrying out, as for the created mated strain, tetrad dissection to acquire an isolated spore; and screening the obtained isolated spore to select a strain having a character of a sucrose unassimilating property and flocculation.

13 . A yeast strain obtained by diploidizing the yeast strain according to claim 12 .

14 . A method of breeding yeast strain comprising:
subjecting a yeast strain expressed by accession number NBRC 10055 and a yeast strain expressed by accession number NITE BP-1589 to spore isolation to acquire an isolated spore showing type a or type α as a mating type; mating the isolated spore of NBRC 10055 and the isolated spore of NITE BP-1589 which have different mating types to create a mated strain; carrying out, as for the created mated strain, tetrad dissection to acquire an isolated spore; and screening the obtained isolated spore to select a strain having characters of a sucrose unassimilating property and flocculation.

15 . A method of breeding yeast strain according to claim 14 , further comprising:
diploidizing the obtained yeast strain.

Assignees

• Asahi Group Holdings Ltd

Inventors

• Masuda Takayuki
• Kato Taku

Classifications

• C12N3/00

  Spore forming or isolating processes · CPC title

• C12N1/18

  Baker's yeast; Brewer's yeast · CPC title

• C13B30/06

  by centrifugal force · CPC title

• C12P7/06 Primary

  Ethanol, i.e. non-beverage · CPC title

• C12R1/865

  Chemistry & Metallurgy · mapped topic