Skala W, Goettig P, Brandstetter H. Do-it-yourself histidine-tagged bovine enterokinase: a handy member of the protein engineer's toolbox.
J Biotechnol 2013;
168:421-5. [PMID:
24184090 PMCID:
PMC3863954 DOI:
10.1016/j.jbiotec.2013.10.022]
[Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 10/08/2013] [Accepted: 10/14/2013] [Indexed: 11/21/2022]
Abstract
Enterokinase, a two-chain duodenal serine protease, activates trypsinogen by removing its N-terminal propeptide. Due to a clean cut after the non-primed site recognition sequence, the enterokinase light chain is frequently employed in biotechnology to separate N-terminal affinity tags from target proteins with authentic N-termini. In order to obtain large quantities of this protease, we adapted an in vitro folding protocol for a pentahistidine-tagged triple mutant of the bovine enterokinase light chain. The purified, highly active enzyme successfully processed recombinant target proteins, while the pentahistidine-tag facilitated post-cleavage removal. Hence, we conclude that producing enterokinase in one's own laboratory is an efficient alternative to the commercial enzyme.
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