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EasyGrid: A versatile platform for automated cryo-EM sample preparation and quality control
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EasyGrid: A versatile platform for automated cryo-EM sample preparation and quality control
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Paper
EasyGrid: A versatile platform for automated cryo-EM sample preparation and quality control
2024
Overview
Imaging biological macromolecules in their native state with single-particle cryo-electron microscopy (cryo-EM) or in situ cryo-electron tomography (cryo-ET) requires optimized approaches for the preparation and vitrification of biological samples. Here, we describe EasyGrid, a versatile technology enabling systematic, tailored and advanced sample preparation for cellular and structural biology. This automated, standalone platform combines in-line plasma treatment, microfluidic dispensing, blot-less sample spreading, jet-based vitrification and on-the-fly grid quality control using light interferometry to streamline cryo-EM sample optimization. With EasyGrid, we optimized grid preparation for different purified macromolecular complexes and subsequently determined their structure with cryo- EM. We also demonstrated how the platform allows better vitrification of large, mammalian cells compared to standard plunge-freezing. Automated sample preparation with EasyGrid establishes an advanced, high-throughput platform for both single-particle cryo-EM and cellular cryo-ET sample preparation.Competing Interest StatementGergely Papp, Florent Cipriani - pending patent WO 2020/058140 Gergely Papp - European patent application 23 209 700.6
Publisher
Cold Spring Harbor Laboratory Press,Cold Spring Harbor Laboratory
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