1. Generation and characterization of caprine chymosin in corn seed.
- Author
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Liu WG, Wang YP, Zhang ZJ, Wang M, Lv QX, Liu HW, Meng LC, and Lu M
- Subjects
- Agrobacterium tumefaciens genetics, Agrobacterium tumefaciens metabolism, Animals, Chymosin genetics, Chymosin isolation & purification, Chymosin pharmacology, Cloning, Molecular, Enzyme Assays, Flocculation drug effects, Food Technology, Gene Expression, Genetic Vectors metabolism, Globulins genetics, Globulins metabolism, Goats, Kinetics, Milk chemistry, Milk drug effects, Plant Proteins genetics, Plant Proteins metabolism, Promoter Regions, Genetic, Recombinant Proteins biosynthesis, Recombinant Proteins genetics, Recombinant Proteins isolation & purification, Recombinant Proteins pharmacology, Seeds enzymology, Transformation, Genetic, Zea mays enzymology, Chymosin biosynthesis, Genetic Vectors chemistry, Plants, Genetically Modified, Seeds genetics, Zea mays genetics
- Abstract
Chymosin is widely used in the dairy industry, and much is produced through recombinant DNA in organisms such as bacteria and tobacco. In this study, we used a new transgenic method to express caprine chymosin in corn seeds with lower cost and better storage capability. The recombinant chymosin protein was successfully expressed at an average level of 0.37 mg/g dry weight, which is 0.27% of the total soluble protein in the corn seed. Prochymosin can be activated to produce a chymosin protein with the ability to induce clotting in milk, similar to the commercial protein. The activity of the purified recombinant chymosin was as high as 178.5 U/mg. These results indicate that we have successfully established a technology for generating corn seed-derived caprine chymosin for potential use in the dairy industry., (Copyright © 2017 Elsevier Inc. All rights reserved.)
- Published
- 2017
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