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Updated: Aug 5, 2026
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
Published on: December 13, 2016
Engineering ferritin nanocages for Cd2 + adsorption with magnetic recyclability
Geng Cao1, YiShen Cheng2, Jiachen Zang2
1Key Laboratory of Food Nutrition and Health of Liaoning Province, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China; SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
Engineered ferritin with introduced cysteine residues effectively removes cadmium (Cd²⁺) by creating a thiol-enriched environment. This recyclable nanobiomaterial maintains structural integrity and facilitates magnetic recovery for heavy metal remediation.
Area of Science:
- Biomaterials science
- Nanotechnology
- Environmental science
Background:
- Ferritin's cage-like structure makes it a promising nanoplatform.
- Metal-induced protein aggregation is a challenge for ferritin applications.
- Developing efficient heavy metal adsorbents is crucial for environmental protection.
Purpose of the Study:
- To engineer oyster ferritin for enhanced cadmium (Cd²⁺) adsorption.
- To improve ferritin's structural stability and dispersibility in the presence of Cd²⁺.
- To develop a recyclable ferritin-based system for heavy metal removal.
Main Methods:
- Rational introduction of cysteine residues into oyster ferritin.
- Biochemical characterization (folding, ferroxidase activity, structure).
- Spectroscopic analyses (XPS, ITC), DLS, and TEM for structural and binding studies.
- Adsorption experiments and magnetic separation strategy using Ni-functionalized Fe₃O₄@SiO₂ beads.
Main Results:
- Engineered ferritin (GKFN4C) showed correct folding, preserved activity, and maintained nanocage structure.
- Mutant ferritin exhibited enhanced structural stability and dispersion under high Cd²⁺ conditions.
- Cd²⁺ binding involved coordination interactions, with cysteine enhancing Cd²⁺ enrichment.
- Achieved 90.7% Cd²⁺ removal efficiency and 82.6% protein recovery via magnetic separation.
Conclusions:
- Engineered ferritin serves as an effective and recyclable nanobiomaterial for Cd²⁺ removal.
- Cysteine introduction enhances Cd²⁺ adsorption and protein stability.
- The magnetic separation strategy improves practical applicability for heavy metal remediation.
