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-Structure paper
タイトル | Structure of the membrane-bound formate hydrogenlyase complex from Escherichia coli. |
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ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 5395, Year 2022 |
掲載日 | 2022年9月14日 |
著者 | Ralf Steinhilper / Gabriele Höff / Johann Heider / Bonnie J Murphy / |
PubMed 要旨 | The prototypical hydrogen-producing enzyme, the membrane-bound formate hydrogenlyase (FHL) complex from Escherichia coli, links formate oxidation at a molybdopterin-containing formate dehydrogenase ...The prototypical hydrogen-producing enzyme, the membrane-bound formate hydrogenlyase (FHL) complex from Escherichia coli, links formate oxidation at a molybdopterin-containing formate dehydrogenase to proton reduction at a [NiFe] hydrogenase. It is of intense interest due to its ability to efficiently produce H during fermentation, its reversibility, allowing H-dependent CO reduction, and its evolutionary link to respiratory complex I. FHL has been studied for over a century, but its atomic structure remains unknown. Here we report cryo-EM structures of FHL in its aerobically and anaerobically isolated forms at resolutions reaching 2.6 Å. This includes well-resolved density for conserved loops linking the soluble and membrane arms believed to be essential in coupling enzymatic turnover to ion translocation across the membrane in the complex I superfamily. We evaluate possible structural determinants of the bias toward hydrogen production over its oxidation and describe an unpredicted metal-binding site near the interface of FdhF and HycF subunits that may play a role in redox-dependent regulation of FdhF interaction with the complex. |
リンク | Nat Commun / PubMed:36104349 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.6 - 3.4 Å |
構造データ | EMDB-14429, PDB-7z0s: EMDB-14430, PDB-7z0t: EMDB-14431: Structure of the Escherichia coli formate hydrogenlyase complex (aerobic preparation, consensus refinement) EMDB-14432: Structure of the Escherichia coli formate hydrogenlyase complex (aerobic preparation, focused refinement FdhF) EMDB-14433: Structure of the Escherichia coli formate hydrogenlyase complex (aerobic preparation, focused refinement peripheral arm) EMDB-14434: Structure of the Escherichia coli formate hydrogenlyase complex (aerobic preparation, focused refinement membrane arm) |
化合物 | ChemComp-CDL: ChemComp-PTY: ChemComp-NI: ChemComp-FCO: ChemComp-DR9: ChemComp-SF4: ChemComp-FE: ChemComp-LMN: ChemComp-HOH: ChemComp-MGD: ChemComp-6MO: |
由来 |
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キーワード | MEMBRANE PROTEIN / FHL / group-4 membrane bound hydrogenase / [NiFe] hydrogenase |