2020 Volume 55 Issue 3 Pages 104-108
Cryo-EM single particle analysis can solve multiple protein structures contained in a sample by classification. However, the information on the dynamics between the solved structures is lost and it can only be inferred. About this problem, cryoDRGN, a deep learning approach for solving the three-dimensional reconstruction and structural classification that was announced in 2020, breaks away from discrete data partition. The method is based on an auto-encoder, and realizes continuous structural classification by constructing a latent space that separates the information depending on the projection parameters from the input particle image. In this paper, we explain conventional classification method in single particle analysis and deep learning topics that are the background of cryoDRGN. Then, as a benchmark for structural classification, we try three-dimensional reconstruction on the actual data of GroEL/ES having 6 kinds of complexes.
