Prokaryotic Expression, Purification, and Antibacterial Activity of the Hepcidin Peptide of Crescent Sweetlips ( Plectorhinchus cinctus )

The hepcidin peptide of crescent sweetlips ( Plectorhinchus cinctus ) is a cysteine-rich, cationic antimicrobial peptide that plays a crucial role in the innate immune system’s defense against invading microbes. The aim of this study was to identify the optimal parameters for prokaryotic expression...

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Bibliographic Details
Published in:Current Issues in Molecular Biology
Main Authors: Peixin Wang, Zhongjing Lin, Shaoling Lin, Baodong Zheng, Yi Zhang, Jiamiao Hu
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2023
Subjects:
crescent sweetlips
hepcidin
soluble expression
optimization
antibacterial activity
Biology (General)
QH301-705.5
Arctic
Online Access:https://doi.org/10.3390/cimb45090456
https://doaj.org/article/04385ed56a2647d18e9d3a06a1cf9eed
Description
Summary:The hepcidin peptide of crescent sweetlips ( Plectorhinchus cinctus ) is a cysteine-rich, cationic antimicrobial peptide that plays a crucial role in the innate immune system’s defense against invading microbes. The aim of this study was to identify the optimal parameters for prokaryotic expression and purification of this hepcidin peptide and characterize its antibacterial activity. The recombinant hepcidin peptides were expressed in Escherichia coli strain Arctic Express (DE3), with culture and induction conditions optimized using response surface methodology (RSM). The obtained hepcidin peptides were then purified before tag cleavage, and their antibacterial activity was determined. The obtained results revealed that induction temperature had the most significant impact on the production of soluble recombinant peptides. The optimum induction conditions were determined to be an isopropylthio-β-galactoside (IPTG) concentration of 0.21 mmol/L, induction temperature of 18.81 °C, and an induction time of 16.01 h. Subsequently, the recombinant hepcidin peptide was successfully purified using Ni-IDA affinity chromatography followed by SUMO protease cleavage. The obtained hepcidin peptide (without His-SUMO tag) demonstrated strong antimicrobial activity in vitro against V. parahaemolyticus , E. coli , and S. aureus . The results showed prokaryotic ( E. coli ) expression is a feasible way to produce the hepcidin peptide of crescent sweetlips in a cost-effective way, which has great potential to be used as an antimicrobial agent in aquaculture.

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