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-Structure paper
| タイトル | Atomic model of the F420-reducing [NiFe] hydrogenase by electron cryo-microscopy using a direct electron detector. |
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| ジャーナル・号・ページ | Elife, Vol. 3, Page e01963, Year 2014 |
| 掲載日 | 2014年2月25日 |
著者 | Matteo Allegretti / Deryck J Mills / Greg McMullan / Werner Kühlbrandt / Janet Vonck / ![]() |
| PubMed 要旨 | The introduction of direct electron detectors with higher detective quantum efficiency and fast read-out marks the beginning of a new era in electron cryo-microscopy. Using the FEI Falcon II direct ...The introduction of direct electron detectors with higher detective quantum efficiency and fast read-out marks the beginning of a new era in electron cryo-microscopy. Using the FEI Falcon II direct electron detector in video mode, we have reconstructed a map at 3.36 Å resolution of the 1.2 MDa F420-reducing hydrogenase (Frh) from methanogenic archaea from only 320,000 asymmetric units. Videos frames were aligned by a combination of image and particle alignment procedures to overcome the effects of beam-induced motion. The reconstructed density map shows all secondary structure as well as clear side chain densities for most residues. The full coordination of all cofactors in the electron transfer chain (a [NiFe] center, four [4Fe4S] clusters and an FAD) is clearly visible along with a well-defined substrate access channel. From the rigidity of the complex we conclude that catalysis is diffusion-limited and does not depend on protein flexibility or conformational changes. DOI: http://dx.doi.org/10.7554/eLife.01963.001. |
リンク | Elife / PubMed:24569482 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.36 Å |
| 構造データ | |
| 化合物 | ![]() ChemComp-FE: ![]() ChemComp-NI: ![]() ChemComp-FE2: ![]() ChemComp-SF4: ![]() ChemComp-ZN: ![]() ChemComp-FAD: |
| 由来 |
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キーワード | OXIDOREDUCTASE / FLAVOPROTEIN / ELECTRON TRANSFER / FERREDOXIN |
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methanothermobacter marburgensis (古細菌)
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