Improved Secretory Production of the Sweet-Tasting Protein, Brazzein, in Kluyveromyces lactis
- Authors
- Yun, Cho-Rong; Kong, Ji-Na; Chung, Ju-Hee; Kim, Myung-Chul; Kong, Kwang-Hoon
- Issue Date
- Aug-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- brazzein; Kluyveromyces lactis; disulfide bond; KlERO1; KlPDI; secretory expression; sweet protein
- Citation
- JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, v.64, no.32, pp 6312 - 6316
- Pages
- 5
- Journal Title
- JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
- Volume
- 64
- Number
- 32
- Start Page
- 6312
- End Page
- 6316
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6634
- DOI
- 10.1021/acs.jafc.6b02446
- ISSN
- 0021-8561
1520-5118
- Abstract
- Brazzein is an intensely sweet protein with high stability over a wide range of pH values and temperatures, due to its four disulfide bridges. Recombinant brazzein production through secretory expression in Kluyveromyces lactis is reported, but is inefficient due to incorrect disulfide formation, which is crucial for achieving the final protein structure and stability. Protein disulfide bond formation requires protein disulfide isomerase (PDI) and Erolp. Here, we overexpressed KIPDI in K. lactis or treated the cells with dithiothreitol to overexpress KIEROI and improve brazzein secretion. KIPDI and KIERO1 overexpression independently increased brazzein secretion in K. lactis by 1.7-2.2- and 1.3-1.6-fold, respectively. Simultaneous overexpression of KlPDI and KlERO1 accelerated des-pE1M-brazzein secretion by approximately 2.6-fold compared to the previous system. Moreover, intracellular misfolded/unfolded recombinant des-pE1M-brazzein was significantly decreased. In conclusion, increased KlPDI and KIEROI expression favors brazzein secretion, suggesting that correct protein folding may be crucial to brazzein secretion in K. lactis.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.