Related Experiment Video
Updated: Sep 18, 2025
10:23
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
Published on: December 13, 2016
10.1K
Iron mineral formation using chiton-derived ferritins.
Shenghao Du1, Juanli Liao1, Dawei Sun1
1Jiangsu Province Engineering Research Center for Marine Bio-resources Sustainable Utilization, College of Oceanography, Hohai University, Nanjing 210024, China.
Summary
Chiton teeth contain iron oxide minerals, and ferritin proteins from their hemolymph facilitate iron biomineralization. These findings enhance understanding of how chitons form their exceptionally hard teeth.
Area of Science:
- Biomineralization research
- Materials science
- Marine biology
Background:
- Chiton teeth are among the hardest known biomaterials.
- These teeth are composed of iron oxide minerals.
- The role of ferritin in chiton tooth iron biomineralization is not well understood.
Purpose of the Study:
- To investigate the role of ferritin in iron biomineralization in chiton teeth.
- To determine if ferritins isolated from chiton hemolymph are involved in tooth formation.
Main Methods:
- Ferritin isolation from chiton hemolymph.
- Transcriptome and proteome analysis to identify ferritins in hemolymph and radulae.
- In vitro and ex vivo assays to assess ferritin's iron-binding and mineral-promoting capabilities.
Main Results:
- Ferritins from chiton hemolymph are also present in chiton radulae.
- These ferritins bind iron ions and promote iron-based mineral formation in vitro.
- Ex vivo experiments show chiton ferritins facilitate iron oxide biomineralization in radular scaffolds, though crystal structure differs from native magnetite.
Conclusions:
- Ferritins play a conserved, universal role in chiton tooth formation.
- Findings advance molecular understanding of iron biomineralization in chitons.
- Provides insights for designing synthetic iron-based nanomaterials.
Related Concept Videos
01:28The Early Endosome: Endocytosis of Transferrin
3.5K
Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
3.5K
03:45Formation of Complex Ions
24.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.0K
01:30Ferrocement
346
Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
346
00:56Extraction: Advanced Methods
550
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
550
01:19The Structure of Intermediate Filaments
4.2K
The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm). These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate...
Intermediate...
4.2K
01:19Complexation Equilibria: The Chelate Effect
683
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
683