期刊
PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
卷 50, 期 4, 页码 620-628出版社
WILEY
DOI: 10.1002/prot.10298
关键词
cellulose-binding domain; solubilization; fusion protein; Clostridium cellulovorans; cellulosome; cellulase
Clostridium cellulovorans produces a cellulase complex (cellulosome) as well as noncellulosomal cellulases. In this study, we determined a factor that affected the solubility of the cellulosomal cellulase EngB and the noncellulosomal EngD when they were expressed in Escherichia coli. The catalytic domains of EngB and EngD formed inclusion bodies when expressed in E. coli. On the other hand, both catalytic domains containing the C-terminal cellulose-binding domain (CBD) of EngD were expressed in soluble form. Fusion with the CBD of EngD also helped increased the solubility of cellulosomal cellulase EngL upon expression in E. coli. These results indicate that the CBD of EngD plays an important role in the soluble expression of the catalytic domains of EngB, EngL, and EngD. The possible mechanisms of solubilization by fusion of the catalytic domain with the CBD from EngD are discussed. (C) 2003 Wiley-Liss, Inc.
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