French Infrastructure for Integrated Structural Biology (FRISBI)
ANR-10-INSB-05-02
フランス
Grenoble Alliance for Integrated Structural Cell Biology (GRAL)
ANR-10-LABX-49-01
フランス
引用
ジャーナル: Biomolecules / 年: 2022 タイトル: Oxygen-Sensitive Metalloprotein Structure Determination by Cryo-Electron Microscopy. 著者: Mickaël V Cherrier / Xavier Vernède / Daphna Fenel / Lydie Martin / Benoit Arragain / Emmanuelle Neumann / Juan C Fontecilla-Camps / Guy Schoehn / Yvain Nicolet / 要旨: Metalloproteins are involved in key cell processes such as photosynthesis, respiration, and oxygen transport. However, the presence of transition metals (notably iron as a component of [Fe-S] ...Metalloproteins are involved in key cell processes such as photosynthesis, respiration, and oxygen transport. However, the presence of transition metals (notably iron as a component of [Fe-S] clusters) often makes these proteins sensitive to oxygen-induced degradation. Consequently, their study usually requires strict anaerobic conditions. Although X-ray crystallography has been the method of choice for solving macromolecular structures for many years, recently electron microscopy has also become an increasingly powerful structure-solving technique. We have used our previous experience with cryo-crystallography to develop a method to prepare cryo-EM grids in an anaerobic chamber and have applied it to solve the structures of apoferritin and the 3 [FeS]-containing pyruvate ferredoxin oxidoreductase (PFOR) at 2.40 Å and 2.90 Å resolution, respectively. The maps are of similar quality to the ones obtained under air, thereby validating our method as an improvement in the structural investigation of oxygen-sensitive metalloproteins by cryo-EM.