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Bacillus sonorensis KCTC13918로부터 새로운 laccase유전자 ( soncotA )의 클로닝과 대장균에서의 발현
최신건(Shin-Geon Choi),윤현종(Hyeonjong Yoon) 강원대학교 산업기술연구소 2017 産業技術硏究 Vol.37 No.1
A new putative laccase gene (soncotA) which show 78% homology with that from Bacillus licheniformis (liccotA) was isolated from draft genome sequence of Bacillus sonorensis KCTC 13918. A 1,545 bp of PCR product corresponding 514 amino acids was cloned into NdeI-NotI site of pET21c and expressed as soluble form in E. coli. About 59 kDa size of recombinant laccase was purified into homogenity by Ni-NTA column and laccase activity was confirmed by zymography. The enzymatic properties of recombinant laccase were characterized. The specific activity of B. sonorensis laccase was 0.033 fold lower than that of Bacillus licheniformis laccase. The finding of new laccase gene broadened the enzymatic diversity of Bacillus species laccases.