7CPI

His-Mediated Reversible Self-assembly of Ferritin Nanocage with Zn binding

Summary for 7CPI

• Entry DOI: 10.2210/pdb7cpi/pdb
• Descriptor: Ferritin, FE (III) ION, ZINC ION, ... (4 entities in total)
• Functional Keywords: ferritin, assembly, zn binding, metal binding protein
• Biological source: Penaeus japonicus (Kuruma prawn)
• Total number of polymer chains: 6
• Total formula weight: 119538.30

Authors

Gu, C.,Zhang, T.,Zhao, G. (deposition date: 2020-08-07, release date: 2021-06-16, Last modification date: 2023-11-29)

Primary citation

Gu, C.,Zhang, T.,Lv, C.,Liu, Y.,Wang, Y.,Zhao, G.
His-Mediated Reversible Self-Assembly of Ferritin Nanocages through Two Different Switches for Encapsulation of Cargo Molecules.
Acs Nano, 2020

PubMed Abstract: Protein nanocages represent a class of nanovehicles for a variety of applications. However, precise manipulation of self-assembly behavior of these protein nanocages in response to multiple external stimuli for custom-tailored applications remains challenging. Herein, we established a simple but effective strategy for controlling protein nanocage self-assembly that combines a dual property of His motifs (their significantly pH-dependent protonation state and their capacity to coordinate with transition metals) with its high symmetry. With this strategy, we enabled two different ferritin nanocages to disassemble into protein tetramers under neutral solution by introducing His motifs at the 4-fold channel interfaces. Notably, these tetramers are able to self-assemble into ferritin-like protein nanocages in response to multiple external stimuli such as transition metal ions and pH, and , indicative of a reversible self-assembly process. Furthermore, such His-mediated reversible protein self-assembly has been explored for encapsulation of bioactive cargo molecules within these reconstituted protein nanocages with higher loading efficiency under milder conditions as compared to the reported acid denaturation encapsulation method for ferritin.

PubMed: 33197176
DOI: 10.1021/acsnano.0c06670

Experimental method

X-RAY DIFFRACTION (2.602 Å)