ジャーナル: J Struct Biol / 年: 2015 タイトル: Semi-automated selection of cryo-EM particles in RELION-1.3. 著者: Sjors H W Scheres / 要旨: The selection of particles suitable for high-resolution cryo-EM structure determination from noisy micrographs may represent a tedious and time-consuming step. Here, a semi-automated particle ...The selection of particles suitable for high-resolution cryo-EM structure determination from noisy micrographs may represent a tedious and time-consuming step. Here, a semi-automated particle selection procedure is presented that has been implemented within the open-source software RELION. At the heart of the procedure lies a fully CTF-corrected template-based picking algorithm, which is supplemented by a fast sorting algorithm and reference-free 2D class averaging to remove false positives. With only limited user-interaction, the proposed procedure yields results that are comparable to manual particle selection. Together with an improved graphical user interface, these developments further contribute to turning RELION from a stand-alone refinement program into a convenient image processing pipeline for the entire single-particle approach.
EMPIAR-10017 (タイトル: Beta-galactosidase Falcon-II micrographs plus manually selected coordinates by Richard Henderson Data size: 5.3 Data #1: Beta-galactosidase micrographs + coordinates [micrographs - single frame])
カテゴリ: CCD フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 実像数: 84 / 平均電子線量: 24 e/Å2 詳細: Every image is the average of 24 raw (unaligned) movie frames. The complete set of electron micrographs used to obtain the density map presented here is available through the Electron ...詳細: Every image is the average of 24 raw (unaligned) movie frames. The complete set of electron micrographs used to obtain the density map presented here is available through the Electron Microscopy Pilot Image ARchive (EMPIAR).
The particles were selected using the new semi-automatic particle selection procedures in RELION-1.3. This reconstruction was done to test these procedures.
CTF補正
詳細: RELION
最終 再構成
想定した対称性 - 点群: D2 (2回x2回 2面回転対称) 解像度のタイプ: BY AUTHOR / 解像度: 4.2 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: RELION, CTFFIND3 / 使用した粒子像数: 42755