ジャーナル: Elife / 年: 2016 タイトル: Accelerated cryo-EM structure determination with parallelisation using GPUs in RELION-2. 著者: Dari Kimanius / Björn O Forsberg / Sjors Hw Scheres / Erik Lindahl / 要旨: By reaching near-atomic resolution for a wide range of specimens, single-particle cryo-EM structure determination is transforming structural biology. However, the necessary calculations come at large ...By reaching near-atomic resolution for a wide range of specimens, single-particle cryo-EM structure determination is transforming structural biology. However, the necessary calculations come at large computational costs, which has introduced a bottleneck that is currently limiting throughput and the development of new methods. Here, we present an implementation of the RELION image processing software that uses graphics processors (GPUs) to address the most computationally intensive steps of its cryo-EM structure determination workflow. Both image classification and high-resolution refinement have been accelerated more than an order-of-magnitude, and template-based particle selection has been accelerated well over two orders-of-magnitude on desktop hardware. Memory requirements on GPUs have been reduced to fit widely available hardware, and we show that the use of single precision arithmetic does not adversely affect results. This enables high-resolution cryo-EM structure determination in a matter of days on a single workstation.
使用したクラス数: 1 想定した対称性 - 点群: D2 (2回x2回 2面回転対称) アルゴリズム: FOURIER SPACE / 解像度のタイプ: BY AUTHOR / 解像度: 2.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: RELION (ver. 2.0) 詳細: Standard RELION post-processing, i.e. convolution effects of the solvent mask are corrected for using phase-randomisation. 使用した粒子像数: 108209
初期 角度割当
タイプ: PROJECTION MATCHING / ソフトウェア - 名称: RELION (ver. 2.0) / 詳細: Standard RELION 3D auto-refine
最終 角度割当
タイプ: PROJECTION MATCHING / ソフトウェア - 名称: RELION (ver. 2.0) / 詳細: Standard RELION 3D auto-refine
最終 3次元分類
クラス数: 8 / ソフトウェア - 名称: RELION (ver. 2.0) 詳細: Selected 7 out of 8 3D classes. Also 2D classification was performed to select suitable particles.