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Related Experiment Video

Updated: Jul 22, 2026

Capillary Electrophoresis to Monitor Peptide Grafting onto Chitosan Films in Real Time

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Published on: October 26, 2016

Pilot-Scale Production of Chito-Oligosaccharides Using an Innovative Recombinant Chitosanase Preparation Approach.

Chih-Yu Cheng¹, Chia-Huang Tsai¹, Pei-Jyun Liou¹

¹Department of Marine Biotechnology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan.

|January 22, 2021

Summary

This study presents an economical method for producing recombinant chitosanase from E. coli, yielding purified enzyme for chitosan hydrolysis. The optimized process enables cost-effective production of tailored chito-oligosaccharides.

Keywords:

chito-oligosaccharides chitosanase recombinant protein selective precipitation

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Area of Science:

Biotechnology
Enzymology
Biochemistry

Background:

Pilot-scale production of chito-oligosaccharides requires cost-effective recombinant chitosanase.
Current methods for recombinant chitosanase preparation can be inefficient and costly.

Purpose of the Study:

To develop an efficient and economical method for preparing recombinant Bacillus chitosanase from Escherichia coli.
To optimize conditions for cell culture, disruption, selective precipitation, and purification of the enzyme.

Main Methods:

Optimized bacterial cell culture with Isopropyl β-d-1-thiogalactopyranoside (IPTG) induction.
Cell disruption via sonication followed by selective precipitation to remove impurities.
Examination of factors including pH, ionic concentration, and cell density for optimal purification.
Purification of recombinant chitosanase and subsequent hydrolysis of chitosan.

Main Results:

Optimal purification conditions identified as pH 4.5, 300 mM sodium dihydrogen phosphate, and cell density below 10^11 cells/mL.
Recombinant chitosanase purified to >70% homogeneity with 90% activity recovery and 106 mg/L yield.
Hydrolysis of 5% chitosan yielded products with molar masses of 833 ± 222 g/mol (chito-dimer to tetramer).

Conclusions:

An economical and eco-friendly method for recombinant chitosanase preparation was established.
The optimized process facilitates scale-up for producing tailored chito-oligosaccharides.
This advancement supports the future industrial application of chitosan hydrolysis.