Structure of β-galactosidase gene from Streptococcus thermophilus SKD 1006 = Streptococcus thermophilus SKD 1006의 β-Galactosidase 유전자 구조

Abstract

The results can be concluded that the pSK 001 contains a gene for β-gal from Str. thermophilus SKD 1006, and expressed in E. coli JM 109. A 4.2 Kb of Hpa II-Hpa II fragment(lac Z of SKD 1006) of pSK 001 was subcloned into the corresponding site of pUC 19, and named pSK 002. A 1.2 Kb of Bgl II -Bgl II fragment of pSK 002 was ligated into the corresponding site of pUC 19, and named pSK 003. The nucleotide sequences of two portions(222bp close to 5' , 143 by close to 3' end) of Bgl II -Bgl II fragment of pSK 003 were determined by Sanger, Chen and Seeburg methods. The nucleotide sequences are identical to those of the gene for β-gal of Str. thermophilus A 054.