Related Experiment Video
Updated: Apr 28, 2026

Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
Structure and property modification of an oligochitosan-glycosylated and crosslinked soybean protein generated by
1College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
Abstract:
The impacts of oligochitosan glycosylation and crosslinking on the structure and properties of a soybean protein were investigated. The reaction was carried out by transglutaminase with 10 kU kg(-1) protein at pH 7.5 and 37°C for 3h, under a protein content of 40 gl(-1) and a molar ratio of acyl donor to oligochitosan acceptor of 1:3. The modified protein contained glucosamine at a concentration of 12.1 g kg(-1) protein. Electrophoresis and infrared spectroscopy analysis confirmed the modified protein to be crosslinked and glycosylated. Circular dichroism analysis showed the modified protein possessed a decreased α-helix and β-structure. The modified protein exhibited lower surface hydrophobicity and emulsifying activity but higher emulsion stability than the soybean protein, it also had better water and oil binding capacity (12.2g and 3.5 ml g(-1) protein, respectively), and could form a thicker protein outer layer in the oil droplets in emulsion. Transglutaminase-induced oligochitosan glycosylation and crosslinking is thus able to modify soybean proteins.
Related Concept Videos
Oligosaccharide Assembly
Multiple sugar molecules that may or may...
Protein Glycosylation
Glycosylation occurs in...
Proteoglycans
Protein and Protein Structure
A protein's shape is critical to its function. For example, an enzyme...
Protein Modifications in the RER
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...

