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Updated: Jun 20, 2026
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Preparation and Delivery of Protein Microcrystals in Lipidic Cubic Phase for Serial Femtosecond Crystallography
Published on: September 20, 2016
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Processing of Freestanding Single Supercrystal Assembled by Atomically Precise Protein-Decorated Nanoparticles
Xin Huang1, Qingqiu Huang1, Shi Feng2
1Cornell High Energy Synchrotron Sources, Cornell University, Ithaca, New York 14853, United States.
Nano Letters
|April 21, 2025
Summary
Protein-decorated ferrihydrite nanoparticles self-assemble into ordered structures. These crystals exhibit tunable spacing and mechanical properties, offering insights for designing adaptive materials.
Area of Science:
- Materials Science
- Nanotechnology
- Biophysics
Background:
- Protein-decorated ferrihydrite nanoparticles (NPs) self-assemble into ordered structures.
- Ferritin-folded nanocages form face-centered cubic (fcc) structures.
- Nanoparticle assembly is influenced by external stimuli.
Purpose of the Study:
- To determine the atomic resolution structure of self-assembled ferrihydrite NPs.
- To characterize the size, shape, and distribution of NPs within assembled structures.
- To investigate the mechanical properties and response to stress of these ordered NP assemblies.
Main Methods:
- X-ray crystallography for atomic resolution structure determination.
- Cryo-electron microscopy (Cryo-EM) with 3D Ab-initio reconstruction for nanoscale imaging.
- In situ small-angle X-ray scattering (SAXS) for assembly dynamics.
- Mechanical compression tests to determine rigid modulus.
Main Results:
- Self-assembly into a face-centered cubic (fcc) structure at atomic resolution.
- Subnanoscale characterization of NP size, shape, and distribution.
- Large 3D spacing variation (314%) with preserved translational symmetry.
- Rigid modulus of 0.81 GPa, with stress-induced water release and biomolecule unfolding.
Conclusions:
- Protein-decorated ferrihydrite NPs form ordered structures with tunable spacing.
- These materials exhibit significant mechanical resilience and adaptive responses to stress.
- Insights gained can guide the design of molecules for enhanced NP assembly and adaptive materials engineering.
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