期刊
BIOCHIMIE
卷 90, 期 5, 页码 830-834出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.biochi.2008.01.013
关键词
protein engineering; glucosyltransferases; domain swapping; glycosylation; enzyme kinetics
This study describes the characterisation of a chimeric mutant derived from two arabidopsis glucosyltransferases, 71C1 and 71C3. A chimera, N1C3, was constructed to contain the N-terminal domain of 71C1 and the C-terminal domain of 71C3. The chimera and the wild-type GTs displayed a similar K-m towards the acceptor scopoletin. However, N1C3 had a K-m near identical to 71C3 towards UDP-glucose, but was three-fold lower than that of 71C1. The results suggest that the acceptor and sugar donor are recognised independently by the N- and C-terminal domain of the GTs respectively, and provide a foundation for the future design of glucosyltransferase biocatalysts through assembling domains with different affinity towards the acceptor and donor. (C) 2008 Elsevier Masson SAS. All rights reserved.
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