Related Experiment Videos
Substrate specificities of microbial transglutaminase for primary amines
T Ohtsuka1, A Sawa, R Kawabata
1Food Research and Development Laboratories, Ajinomoto Company, Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, 210-8681 Japan. tomoko_ootsuka@ajinomoto.com
Journal of Agricultural and Food Chemistry
|January 16, 2001
Summary
Transglutaminase (TGase) enzymes can incorporate diverse functional groups into proteins. This involves using specific primary amines as spacers to attach molecules like carboxyls and saccharides.
Area of Science:
- Biochemistry
- Enzymology
- Protein Chemistry
Background:
- Transglutaminase (TGase) catalyzes acyl transfer reactions, modifying proteins and peptides.
- TGase activity involves primary amines and glutamine (Gln) residues.
- Understanding TGase substrate specificity is key for protein functionalization.
Purpose of the Study:
- To investigate the substrate specificity of TGase for primary amines.
- To explore the incorporation of various functional groups into proteins and peptides using TGase.
Main Methods:
- Utilized microbial transglutaminase and guinea pig liver transglutaminase.
- Assessed the incorporation of primary amines into benzyloxycarbonyl-L-Gln-Gly (Z-Gln-Gly).
Main Results:
- Primary amines required more than four carbons without side chains for incorporation into Z-Gln-Gly.
- Demonstrated that TGase can incorporate diverse functional groups via suitable primary amine spacers.
Conclusions:
- TGase facilitates the covalent attachment of various functional groups to proteins.
- This enzymatic approach enables the modification of proteins with carboxyls, phosphates, and saccharides.