SACCHAROMYCES CEREVISIAE MUTANT STRAIN, AND METHOD FOR PRODUCTION OF YEAST HAVING HIGH RNA CONTENT USING THE MUTANT STRAIN

摘要

According to the present invention, a Saccharomyces cerevisiae mutant strain, a Saccharomyces cerevisiae ABYC 1591 (FERM BP-10925) strain which are characterized by having an RNA content of 14% by weight or more based on the dry cell weight is provided. In addition, a method for producing a yeast of high RNA content characterized in that any one of the above Saccharomyces cerevisiae mutant strains is cultured, and thereby making the mutant strain accumulate, in the cells thereof, 14% by weight or more of RNA based on the dry cell weight; a culture of any one of the above Saccharomyces cerevisiae mutant strains; and a yeast extract prepared from the culture are provided. The Saccharomyces cerevisiae mutant strain of the present invention has a high RNA content as well as favorable growth properties.