7K26

Crystal structure of Human H-chain Ferritin variant infused with Sodium Acrylate

Summary for 7K26

• Entry DOI: 10.2210/pdb7k26/pdb
• Related: 6WYF 6WYG 6WYH
• Descriptor: Ferritin heavy chain, FE (III) ION, SODIUM ION, ... (5 entities in total)
• Functional Keywords: ferritin, polymer, hydrogel, polymer integrated crystals, crystal hydrogel hybrids, raft polymerization, oxidoreductase
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 12
• Total formula weight: 254681.26

Authors

Bailey, J.B.,Zhang, L. (deposition date: 2020-09-08, release date: 2020-11-11, Last modification date: 2023-10-18)

Primary citation

Han, K.,Bailey, J.B.,Zhang, L.,Tezcan, F.A.
Anisotropic Dynamics and Mechanics of Macromolecular Crystals Containing Lattice-Patterned Polymer Networks.
J.Am.Chem.Soc., 142:19402-19410, 2020

PubMed Abstract: The mechanical and functional properties of many crystalline materials depend on cooperative changes in lattice arrangements in response to external perturbations. However, the flexibility and adaptiveness of crystalline materials are limited. Additionally, the bottom-up, molecular-level design of crystals with desired dynamic and mechanical properties at the macroscopic level remains a considerable challenge. To address these challenges, we had previously integrated mesoporous, cubic ferritin crystals with hydrogel networks, resulting in hybrid materials (polymer-integrated crystals or PIX) which could undergo dramatic structural changes while maintaining crystalline periodicity and display efficient self-healing. The dynamics and mechanics of these ferritin-PIX were devoid of directionality, which is an important attribute of many molecular and macroscopic materials/devices. In this study, we report that such directionality can be achieved through the use of ferritin crystals with anisotropic symmetries (rhombohedral or trigonal), which enable the templated formation of patterned hydrogel networks in crystallo. The resulting PIX expand and contract anisotropically without losing crystallinity, undergo prompt bending motions in response to stimuli, and self-heal efficiently, capturing some of the essential features of sophisticated biological devices like skeletal muscles.

PubMed: 33124805
DOI: 10.1021/jacs.0c10065

Experimental method

X-RAY DIFFRACTION (2.7 Å)