Cloning and expression of aBacillussp. 79-23 cellulase gene

✍ Scribed by Kyung Hwa Jung; Yong Chin Chun; Jae-Chan Lee; Jeong Hyun Kim; Ki-Hong Yoon

• Publisher: Springer Netherlands
• Year: 1996
• Tongue: English
• Weight: 336 KB
• Volume: 18
• Category: Article
• ISSN: 0141-5492
• DOI: 10.1007/bf00129735

✦ Synopsis

A gene for encoding cellulase was cloned from Bacillus sp 79-23 into Escherichia coli and the nucleotide sequence was determined. The cellulase gene, designated as celS, was composed of 1,497 base pairs and the nucleotide sequence of the celS gene was highly homologous to those of other B. subtilis cellulase genes. The enzyme encoded by celS was highly active on carboxymethylcellulose but also exhibited activity towards avicel and p-nitrophenyl-13-D-cellobiopyranoside. When its native promoter was replaced with a strong B. subtilis promoter, the extracellular cellulase was produced up to 8.5 units per ml in B. subtilis DB 104.