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タイトル | ISOLDE: a physically realistic environment for model building into low-resolution electron-density maps. |
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ジャーナル・号・ページ | Acta Crystallogr D Struct Biol, Vol. 74, Issue Pt 6, Page 519-530, Year 2018 |
掲載日 | 2018年6月1日 |
![]() | Tristan Ian Croll / ![]() |
PubMed 要旨 | This paper introduces ISOLDE, a new software package designed to provide an intuitive environment for high-fidelity interactive remodelling/refinement of macromolecular models into electron-density ...This paper introduces ISOLDE, a new software package designed to provide an intuitive environment for high-fidelity interactive remodelling/refinement of macromolecular models into electron-density maps. ISOLDE combines interactive molecular-dynamics flexible fitting with modern molecular-graphics visualization and established structural biology libraries to provide an immersive interface wherein the model constantly acts to maintain physically realistic conformations as the user interacts with it by directly tugging atoms with a mouse or haptic interface or applying/removing restraints. In addition, common validation tasks are accelerated and visualized in real time. Using the recently described 3.8 Å resolution cryo-EM structure of the eukaryotic minichromosome maintenance (MCM) helicase complex as a case study, it is demonstrated how ISOLDE can be used alongside other modern refinement tools to avoid common pitfalls of low-resolution modelling and improve the quality of the final model. A detailed analysis of changes between the initial and final model provides a somewhat sobering insight into the dangers of relying on a small number of validation metrics to judge the quality of a low-resolution model. |
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手法 | EM (単粒子) |
解像度 | 3.8 Å |
構造データ | ![]() PDB-6eyc: |
化合物 | ![]() ChemComp-ZN: ![]() ChemComp-ADP: |
由来 |
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