Title:Production of Recombinant Human Hybrid Ferritin with Heavy Chain
and Light Chain in Escherichia coli and its Characterization
Volume: 24
Issue: 2
Author(s): Xiaotong Song, Yongxiang Zheng, Yongdong Liu, Huan Meng, Rong Yu and Chun Zhang*
Affiliation:
- Department of Biopharmaceutics, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry,
Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial
Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
Keywords:
Recombinant human hybrid ferritin, E. coli co-expression, human ferritin, heavy chain light chain, size exclusion chromatography, mass spectrometry.
Abstract:
Background: Natural human ferritin generally contains 24 subunits with different ratios
of heavy chain to light chain, and the ratio of both subunits varies depending on tissue distribution
and pathological conditions. However, the production of recombinant hybrid ferritin with both subunits
is more challenging.
Objective: This study aimed to prepare the recombinant hybrid ferritin for prokaryotic expression
and characterize its structure and physicochemical properties.
Methods: A prokaryotic expression vector of pACYCDuet-1 harboring the two individual genes of
human ferritin heavy chain and light chain (FTH/FTL-pACYCDuet-1) was constructed and transfected
into Escherichia coli bacteria. Then the genes were co-induced by IPTG to express.
Results: The ferritin was purified by hydrophobic interaction chromatography combining size exclusion
chromatography and verified by mass spectrometry and characterized by spectral and morphological
analysis.
Conclusion: FTH and FTL subunits were successfully co-assembled into a hybrid ferritin nanoparticle
(rhFTH/L). The structure of rhFTH/L was demonstrated highly ordered and fairly compact. Besides,
the hybrid rhFTH/L nanoparticle was shown more sensitive to thermal stress and reduced stability
when compared with that of both individual rhFTH and rhFTL.