NUCLEOTIDE-SEQUENCE OF THE GENE FOR AN ALKALINE ENDOGLUCANASE FROM AN ALKALOPHILIC BACILLUS AND ITS EXPRESSION IN ESCHERICHIA-COLI AND BACILLUS-SUBTILIS

作者：SUMITOMO N; OZAKI K; KAWAI S; ITO S

来源：Bioscience Biotechnology and Biochemistry, 1992, 56(6): 872-877.

The gene for an alkaline endoglucanase from the alkalophilic Bacillus sp. KSM-64 was cloned into the HindIII site of pBR322 and expressed in Escherichia coli HB101. The nucleotide sequence of a 4.1-kb region of the HindIII insert had two open reading frames, ORF-1 and ORF-2. The protein deduced from ORF-1 was composed of 244 amino acids with an M(r) of 27,865. Subcloning analysis proved that the alkaline endoglucanase was encoded by ORF-2 (822 amino acids with an M(r) of 91,040). Upstream from ORF-2, there were three consensus like sequences of the sigma A-type promoter of Bacillus subtilis, a putative Shine-Dalgarno sequence (AGGAGGT), and a catabolite repression operator-like sequence (TGTAAGC-GGTTAACC). The HindIII insert was subcloned into a shuttle vector, pHY300PLK, and the encoded alkaline endoglucanase gene was highly expressed both in E. coli and B. subtilis. One of the three promoter-like sequences in ORF-2 could be suitable for high levels of enzyme expression in both host organisms.

• 出版日期1992-6