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Parallel steady state studies on a milliliter scale accelerate fed‐batch bioprocess design for recombinant protein production with Escherichia coli
Author(s) -
Schmideder Andreas,
Cremer Johannes H.,
WeusterBotz Dirk
Publication year - 2016
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1002/btpr.2360
Subject(s) - bioprocess , bioreactor , escherichia coli , lac operon , batch processing , recombinant dna , liter , scale up , batch reactor , yield (engineering) , process optimization , chemistry , process engineering , computer science , biology , biochemistry , materials science , chemical engineering , engineering , catalysis , physics , organic chemistry , classical mechanics , metallurgy , gene , programming language , endocrinology
In general, fed‐batch processes are applied for recombinant protein production with Escherichia coli ( E. coli ). However, state of the art methods for identifying suitable reaction conditions suffer from severe drawbacks, i.e. direct transfer of process information from parallel batch studies is often defective and sequential fed‐batch studies are time‐consuming and cost‐intensive. In this study, continuously operated stirred‐tank reactors on a milliliter scale were applied to identify suitable reaction conditions for fed‐batch processes. Isopropyl β‐ d ‐1‐thiogalactopyranoside (IPTG) induction strategies were varied in parallel‐operated stirred‐tank bioreactors to study the effects on the continuous production of the recombinant protein photoactivatable mCherry (PAmCherry) with E. coli . Best‐performing induction strategies were transferred from the continuous processes on a milliliter scale to liter scale fed‐batch processes. Inducing recombinant protein expression by dynamically increasing the IPTG concentration to 100 µM led to an increase in the product concentration of 21% (8.4 g L −1 ) compared to an implemented high‐performance production process with the most frequently applied induction strategy by a single addition of 1000 µM IPGT. Thus, identifying feasible reaction conditions for fed‐batch processes in parallel continuous studies on a milliliter scale was shown to be a powerful, novel method to accelerate bioprocess design in a cost‐reducing manner. © 2016 American Institute of Chemical Engineers Biotechnol. Prog ., 32:1426–1435, 2016