Download MendeleyOxygen-Sensitive Metalloprotein Structure Determination by Cryo-Electron Microscopy.
Cherrier, M.V., Vernede, X., Fenel, D., Martin, L., Arragain, B., Neumann, E., Fontecilla-Camps, J.C., Schoehn, G., Nicolet, Y.(2022) Biomolecules 12
- PubMed: 35327633
- DOI: https://doi.org/10.3390/biom12030441
- Primary Citation of Related Structures:
7PLM - PubMed Abstract:
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 [Fe 4 S 4 ]-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.
Organizational Affiliation:
Metalloproteins Unit, Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France.
