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[Preprint]. 2023 Apr 26:2023.04.25.538338. [Version 1] doi: 10.1101/2023.04.25.538338

Structure determination of a DNA crystal by MicroED

Alison Haymaker, Andrey A Bardin, Tamir Gonen, Michael W Martynowycz, Brent L Nannenga
PMCID: PMC10168392  PMID: 37163108

SUMMARY

Microcrystal electron diffraction (MicroED) is a powerful tool for determining high-resolution structures of microcrystals from a diverse array of biomolecular, chemical, and material samples. In this study, we apply MicroED to DNA crystals, which have not been previously analyzed using this technique. We utilized the d(CGCGCG) 2 DNA duplex as a model sample and employed cryo-FIB milling to create thin lamella for diffraction data collection. The MicroED data collection and subsequent processing resulted in a 1.10 Å resolution structure of the d(CGCGCG) 2 DNA, demonstrating the successful application of cryo-FIB milling and MicroED to the investigation of nucleic acid crystals.

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