Alternate carbohydrate and nontraditional inducer leads to increased productivity of a collagen binding domain fusion protein via fed-batch fermentation
by Fruchtl, McKinzie S.; Sakon, Josh; Beitle, Jr, Robert R.
The production of collagen binding domain fusion proteins is of significant importance because of their potential as therapeutic biomaterials. It was previously reported that the expression of collagen-binding domain fusion proteins in Escherichia coil was higher when expressed using lactose as an inducer and chemically defined growth media on a shake flask scale. In an effort to further investigate factors that affect expression levels on a fed-batch scale, alternative induction techniques were tested in conjunction with fed-batch fermentation. In this paper, we discuss ten fed-batch fermentation experiments utilizing either glucose or glycerol feed and using lactose or isopropyl-beta-D-thiogalactopyranoside (IPTG) as an induction source. It was found that glycerol-fed fermentations induced with lactose allowed for greater expression of target protein, though lesser cell densities were achieved. (C) 2016 Elsevier B.V. All rights reserved.
- Journal
- Journal of Biotechnology
- Volume
- 226
- Year
- 2016
- Start Page
- 65
- ISBN/ISSN
- 1873-4863; 0168-1656
- DOI
- 10.1016/j.jbiotec.2016.03.016