Kaino Tomohiro, Tateiwa Tetsuya, Mizukami-Murata Satomi, Shima Jun, Takagi Hiroshi
Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
Appl Environ Microbiol. 2008 Sep;74(18):5845-9. doi: 10.1128/AEM.00998-08. Epub 2008 Jul 18.
We constructed self-cloning diploid baker's yeast strains by disrupting PUT1, encoding proline oxidase, and replacing the wild-type PRO1, encoding gamma-glutamyl kinase, with a pro1(D154N) or pro1(I150T) allele. The resultant strains accumulated intracellular proline and retained higher-level fermentation abilities in the frozen doughs than the wild-type strain. These results suggest that proline-accumulating baker's yeast is suitable for frozen-dough baking.
我们通过破坏编码脯氨酸氧化酶的PUT1,并将编码γ-谷氨酰激酶的野生型PRO1替换为pro1(D154N)或pro1(I150T)等位基因,构建了自克隆二倍体面包酵母菌株。所得菌株积累细胞内脯氨酸,并且在冷冻面团中比野生型菌株保留更高水平的发酵能力。这些结果表明,积累脯氨酸的面包酵母适用于冷冻面团烘焙。