Expression of chondroitin-4-O-sulfotransferase in Escherichia coli and Pichia pastoris

Expression of chondroitin-4-O-sulfotransferase in Escherichia coli and Pichia pastoris Chondroitin sulfates are linear sulfated polysaccharides called glycosaminoglycans. They are important nutraceutical and pharmaceutical products that are biosynthesized through the action of chondroitin sulfotransferases on either an unsulfated chondroitin or a dermatan polysaccharide precursor. While the enzymes involved in the biosynthesis of chondroitin sulfates are well known, the cloning end expression of these membrane-bound Golgi enzymes continue to pose challenges. The major chondroitin-4-sulfotransferase, Homo sapiens C4ST-1, had been previously cloned and expressed from mammalian CHO, COS-7, and HEK 293 cells, and its activity was shown to require glycosylation. In the current study, a C4ST-1 construct was designed and expressed in both Escherichia coli and Pichia pastoris in its non-glycosylated and glycosylated forms. Both constructs showed similar activity albeit different kinetic parameters when acting on a microbially prepared unsulfated chondroitin substrate. Moreover, the glycosylated form of C4ST-1 showed lower stability than the non-glycosylated form. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Microbiology and Biotechnology Springer Journals

Expression of chondroitin-4-O-sulfotransferase in Escherichia coli and Pichia pastoris

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Life Sciences; Microbiology; Microbial Genetics and Genomics; Biotechnology
ISSN
0175-7598
eISSN
1432-0614
D.O.I.
10.1007/s00253-017-8411-5
Publisher site
See Article on Publisher Site

Abstract

Chondroitin sulfates are linear sulfated polysaccharides called glycosaminoglycans. They are important nutraceutical and pharmaceutical products that are biosynthesized through the action of chondroitin sulfotransferases on either an unsulfated chondroitin or a dermatan polysaccharide precursor. While the enzymes involved in the biosynthesis of chondroitin sulfates are well known, the cloning end expression of these membrane-bound Golgi enzymes continue to pose challenges. The major chondroitin-4-sulfotransferase, Homo sapiens C4ST-1, had been previously cloned and expressed from mammalian CHO, COS-7, and HEK 293 cells, and its activity was shown to require glycosylation. In the current study, a C4ST-1 construct was designed and expressed in both Escherichia coli and Pichia pastoris in its non-glycosylated and glycosylated forms. Both constructs showed similar activity albeit different kinetic parameters when acting on a microbially prepared unsulfated chondroitin substrate. Moreover, the glycosylated form of C4ST-1 showed lower stability than the non-glycosylated form.

Journal

Applied Microbiology and BiotechnologySpringer Journals

Published: Jul 31, 2017

References

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