A semiempirical model to control the production of a recombinant aldolase in high cell density cultures of Escherichia coli

被引：9
|
作者：
Ruiz, Jordi [1 ]
Gonzalez, Gloria [1 ]
de Mas, Caries [1 ]
Lopez-Santin, Josep [1 ]
机构：
[1] Univ Autonoma Barcelona, Dept Engn Quim, Escola Engn, Unitat Biocatalisi Aplicada Associada IIQA,CSIC, Bellaterra 08193, Spain
来源：
BIOCHEMICAL ENGINEERING JOURNAL | 2011年 / 55卷 / 02期
关键词：
Recombinant aldolase; Fed-batch; Escherichia coli; Mathematical modeling; Model-based control; Inducer-biomass ratio; FED-BATCH CULTURES; HIGH-LEVEL PRODUCTION; PROTEIN-PRODUCTION; ONLINE OPTIMIZATION; HETEROLOGOUS GENE; FEEDBACK-CONTROL; FOREIGN PROTEIN; KINETIC-MODEL; E; COLI; EXPRESSION;
D O I：
10.1016/j.bej.2011.03.001
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
A semi-empirical mathematical model for recombinant rhamnulose 1-phosphate aldolase (RhuA) production in high cell density cultures of Escherichia coli has been developed. An unstructured and non-segregated approach allowed to identify the inducer-biomass ratio (I/X) as the key parameter influencing initial specific production rate and specific growth rate reduction after induction. Biomass, substrate and RhuA concentration profiles have been properly fitted in fed-batch cultures induced by an IPTG pulse at different I/X ratio ranging from 0 to 3 mu mol IPTG.g-1 dry cell weight. The model has been validated firstly as able to predict recombinant aldolase and biomass production. In addition, since glucose accumulation in the induced period, which is an indicator of activity reduction by proteolysis, can be anticipated, the model has been used for control purposes with excellent results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：82 / 91
页数：10
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