Yeast and method of producing l-lactic acid

Abstract

A yeast having a human- or frog-origin gene encoding L-lactate dehydrogenase transferred thereinto. By producing lactic acid by using the above-described gene and a method of producing lactic acid with the use of the enzyme, it is possible to efficiently produce lactic acid which is widely usable. As a result, lactic acid can be provided at a lower cost.

Description

Production method of yeast and L-lactic acid technical field The present invention relates to a method for producing L-lactic acid. In addition, the present invention also relates to yeast into which a gene encoding L-lactate dehydrogenase has been introduced. The present invention also relates to a method for producing L-lactic acid comprising culturing a yeast into which a gene encoding L-lactate dehydrogenase has been introduced. Background technique Recently, the effective use of resources and the reuse of resources have attracted the attention of the society, especially focusing on polymers made of plants. Among them, the superior properties of polylactic acid as a plant-based polymer are becoming clear. Lactic acid, which is a raw material of polylactic acid, has been conventionally produced by cultivating microorganisms collectively called lactic acid bacteria. Lactic acid bacteria are represented by Lactobacillus and Lactococcus. Although these lactic acid bac...

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Problems solved by technology

However, if the gene possessed by the yeast is mutated, the fermentation time becomes longer and the consumption rate of sugar decreases, etc. (see Patent Document 3 and Patent Document 6)

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