8F28

Lysozyme Structures from Single-Entity Crystallization Method NanoAC

8F28 の概要

• エントリーDOI: 10.2210/pdb8f28/pdb
• 分子名称: Lysozyme C, ACETATE ION, SODIUM ION, ... (5 entities in total)
• 機能のキーワード: act binding, hydrolase
• 由来する生物種: Gallus gallus (chicken)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 14602.19

構造登録者

Yang, R.,Sankaran, B.,Ogbonna, E.,Wang, G. (登録日: 2022-11-07, 公開日: 2023-07-05, 最終更新日: 2023-10-25)

主引用文献

Yang, R.,Kvetny, M.,Brown, W.,Ogbonna, E.N.,Wang, G.
A Single-Entity Method for Actively Controlled Nucleation and High-Quality Protein Crystal Synthesis.
Anal.Chem., 95:9462-9470, 2023

PubMed Abstract: Lack of controls and understanding in nucleation, which proceeds crystal growth and other phase transitions, has been a bottleneck challenge in chemistry, materials, biology, and other fields. The exemplary needs for better methods for biomacromolecule crystallization include (1) synthesizing crystals for high-resolution structure determinations in fundamental research and (2) tuning the crystal habit and thus the corresponding properties in materials and pharmaceutical applications. Herein, a deterministic method is established capable of sustaining the nucleation and growth of a single crystal using the protein lysozyme as a prototype. The supersaturation is localized at the interface between a sample and a precipitant solution, spatially confined by the tip of a single nanopipette. The exchange of matter between the two solutions determines the supersaturation, which is controlled by electrokinetic ion transport driven by an external potential waveform. Nucleation and subsequent crystal growth disrupt the ionic current limited by the nanotip and are detected. The nucleation and growth of individual single crystals are measured in real time. Electroanalytical and optical signatures are elucidated as feedbacks with which active controls in crystal quality and method consistency are achieved: five out of five crystals diffract at a true atomic resolution of up to 1.2 Å. As controls, those synthesized under less optimized conditions diffract poorly. The crystal habits during the growth process are tuned successfully by adjusting the flux. The universal mechanism of nano-transport kinetics, together with the correlations of the diffraction quality and crystal habit with the crystallization control parameters, lay the foundation for the generalization to other materials systems.

PubMed: 37243709
DOI: 10.1021/acs.analchem.3c00175

実験手法

X-RAY DIFFRACTION (1.2 Å)