Kang Wook Lee, Ji Yeong Park, Jae-Yong Park, Jiyeon Chun, Jeong Hwan Kim
언어
영어(ENG)
URL
https://www.earticle.net/Article/A88446
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원문정보
초록
영어
α-Galactosidase gene (aga) from Leuconostoc mesenteroides SY1 was expressed in a heterologous host, Lactobacillus brevis 2.14 using an Escherichia coli-Leuconostoc shuttle vector, pSJE. pSJEaga (pSJE carrying aga) was introduced into Lactobacillus brevis 2.14 by electroporation and transformation efficiency was 1.1×103 per μg DNA. L. brevis transformants (TFs) showed higher α-galactosidase (α-Gal) activities than cells containing pSJE. Transcription levels of aga in L. brevis 2.14 grown on different carbon sources (1%, w/v) were examined by slot blot analysis. Aga transcript levels and α-Gal activities were higher in cells grown on melibiose, raffinose, and galactose than cells on glucose, sucrose, and fructose. Western blot result showed that L. brevis 2.14 harboring pSJEaga produced much more α-Gal when grown on melibiose than on glucose.
목차
Abstract Introduction Materials and Methods Bacterial strains and culture conditions DNA isolation and manipulation Electroporation Slot blot analysis α-Gal activity assay Western blot Results and Discussion References