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Updated: Aug 16, 2026
Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography
Published on: March 30, 2022
Expression and purification of human antimicrobial peptide, dermcidin, in Escherichia coli
Ingrid Cipáková1, Juraj Gasperík, Eva Hostinová
1CPN spol. s r.o., 561 02 Dolní Dobrouc 401, Czech Republic. icipakova@yahoo.com
Abstract:
Human dermcidin, an anionic antimicrobial peptide expressed in the pons of the brain and the sweat glands, displays antimicrobial activity against pathogenic microorganisms such as Staphylococcus aureus and Candida albicans. Here, we describe the recombinant production of a 48 amino acid dermcidin variant with C-terminal homoserine lactone (DCD-1Hsl). Dermcidin coding sequence was cloned downstream of a 125 amino acid ketosteroid isomerase gene and upstream of a His6Tag sequence in pET-31b(+) vector and transformed into Escherichia coli. The fusion protein was expressed in the form of inclusion bodies, purified on His Bind Resin, and cleaved by CNBr to release recombinant DCD-1Hsl. Purification of rDCD-1Hsl was achieved by solid-phase extraction that yielded milligram amounts of peptide with more than 95% purity. Recombinant peptide showed antimicrobial activities against E. coli ML-35p, Salmonella typhimurium 5156, Listeria monocytogenes 264, S. aureus 29/58 (clinical isolate), and C. albicans K2 (clinical strain). The application of this expression/purification approach represents a fast and efficient method to prepare milligram quantities of dermcidin in its biologically active form.
Insights
Researchers developed a recombinant method to produce dermcidin (DCD-1Hsl), an antimicrobial peptide. This efficient process yields milligram quantities of biologically active DCD-1Hsl for potential therapeutic applications against various pathogens.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- Human dermcidin is an anionic antimicrobial peptide found in brain pons and sweat glands.
- It exhibits activity against pathogens like Staphylococcus aureus and Candida albicans.
Purpose of the Study:
- To describe the recombinant production of a 48 amino acid dermcidin variant with a C-terminal homoserine lactone (DCD-1Hsl).
- To establish an efficient method for preparing milligram quantities of biologically active dermcidin.
Main Methods:
- Dermcidin coding sequence was cloned into a pET-31b(+) vector with ketosteroid isomerase and His6Tag.
- Fusion protein expressed in Escherichia coli, purified using His Bind Resin, and cleaved by CNBr.
- Purification of recombinant DCD-1Hsl (rDCD-1Hsl) achieved via solid-phase extraction.
Main Results:
- Recombinant DCD-1Hsl was produced with >95% purity, yielding milligram amounts.
- Antimicrobial activity demonstrated against E. coli, Salmonella typhimurium, Listeria monocytogenes, S. aureus, and C. albicans.
- The expression and purification approach proved fast and efficient.
Conclusions:
- The described method enables the rapid and efficient preparation of milligram quantities of biologically active dermcidin.
- This recombinant production strategy holds promise for developing antimicrobial peptide-based therapeutics.
