Related Experiment Video
Updated: Mar 24, 2026
10:23
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
Published on: December 13, 2016
10.5K
Salt-Dependent Aggregation and Assembly of E coli-Expressed Ferritin
Wei Sun1, Chengfeng Jiao1, Yue Xiao1
1Department of Molecular Biology, College of Basic Medicine, Jilin University, Changchun, China.
Summary
Recombinant ferritin protein aggregation depends on salt concentration. Low salt levels allow soluble ferritin release from E. coli, enabling nanoparticle assembly for novel vaccine delivery systems.
Area of Science:
- Biochemistry
- Materials Science
- Nanotechnology
Background:
- Ferritin is a ubiquitous iron-storage protein found in most organisms.
- Recent studies suggest ferritin's potential for nanoparticle assembly.
- Ferritin is being explored as a novel delivery vehicle for recombinant epitope vaccines.
Purpose of the Study:
- To investigate the ion sensitivity and salt-dependent aggregation of ferritin.
- To determine optimal conditions for releasing soluble ferritin from Escherichia coli.
- To establish a method for self-assembling ferritin nanoparticles for vaccine applications.
Main Methods:
- Investigating ferritin aggregation under varying sodium chloride (NaCl) concentrations.
- Analyzing the solubility of recombinant ferritin expressed in E. coli at different NaCl levels.
- Developing a self-assembly protocol for ferritin-based nanoparticles.
Main Results:
- Ferritin exhibits salt-dependent aggregation, being sensitive to NaCl concentrations.
- Recombinant ferritin can be obtained in a soluble form from E. coli at low NaCl concentrations (≤50 mmol/L).
- These findings provide a basis for self-assembling soluble ferritin or ferritin-fusion proteins into nanoparticles.
Conclusions:
- Ferritin is an ion-sensitive protein with aggregation properties influenced by salt concentration.
- Low NaCl concentrations are crucial for obtaining soluble ferritin from E. coli.
- This research facilitates the development of ferritin-based nanoparticles for vaccine delivery.
Related Concept Videos
01:28The Early Endosome: Endocytosis of Transferrin
5.1K
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...
5.1K
01:23Stringent Response in E. coli
463
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
463
02:41Protein Complex Assembly
17.1K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
17.1K
01:45Tail-anchoring of Proteins in the ER Membrane
4.0K
Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
4.0K
01:45Vesicular Tubular Clusters
3.3K
After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
With the help of motor proteins such...
With the help of motor proteins such...
3.3K