Cloning and expression of the Bacillus amyloliquefaciens transglutaminase gene in E. coli using a bicistronic vector construction

Publication date: Available online 12 November 2019Source: Enzyme and Microbial TechnologyAuthor(s): Lovaine Silva Duarte, Laísa Quadros Barsé, Pedro Ferrari Dalberto, William Tadeu Santos da Silva, Rafael Costa Rodrigues, Pablo Machado, Luiz Augusto Basso, Cristiano Valim Bizarro, Marco Antônio Záchia AyubAbstractTransglutaminases (TGases) are a class of transferases widely used in the food and biotechnology industries. In this work, we describe the production of recombinant Bacillus amyloliquefaciens TGase in Escherichia coli, obtaining the protein in its soluble and active form. In order to reduce TGase activity inside host cells and consequently its toxicity, we constructed a bicistronic plasmid containing the B. amyloliquefaciens TGase gene fused to the inhibitory Streptomyces caniferus prodomain. To make the enzyme active and avoid the need of prodomain removal in vitro, we also cloned the 3C protease gene into the same plasmid. After a fast single-step purification protocol, we obtained a partially purified recombinant TGase with 37 mU/mg protein activity, that crosslinked bovine serum albumin (BSA). This is the first report on the expression of B. amyloliquefaciens TGase in E. coli in its mature and active form.Graphical abstract
Source: Enzyme and Microbial Technology - Category: Biotechnology Source Type: research