Molecular cloning of an endoglucanase gene from an alkalophilic Bacillus sp. and its expression in Escherichia coli

Author:

Kim J M1,Kong I S1,Yu J H1

Affiliation:

1. Department of Food Engineering, Yonsei University, Seoul, Korea.

Abstract

One of the cellulase genes from alkalophilic Bacillus sp. strain N-4 was cloned in pBR322. A recombinant plasmid, pYBC107, expressing carboxymethyl cellulase (CMCase) was isolated, and the size of the cloned HindIII fragment was found to be 5.5 kilobases. The restriction map of pYBC107 showed a different pattern from those of pNKI and pNKII (N. Sashihara, T. Kudo, and K. Horikoshi, J. Bacteriol. 158:503-506, 1984). When the HindIII fragment from pYBC107 was subcloned into pYEJ001, there was a 3.8-fold increase in CMCase activity over that observed with pYBC107. Plasmid pYBC108 constructed by treatment of pYBC107 with HindIII and EcoRI expressed the CMCase activity, although to a limited extent. To verify the originality of cloned pYBC107 from Bacillus sp., we analyzed the restriction digest by Southern blotting.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference21 articles.

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