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-Structure paper
タイトル | Structural insights into the biotechnologically relevant reversible NADPH-oxidizing NiFe-hydrogenase from P.furiosus. |
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ジャーナル・号・ページ | Structure, Year 2025 |
掲載日 | 2025年6月20日 |
![]() | Xiansha Xiao / Gerrit J Schut / Xiang Feng / Patrick M McTernan / Dominik K Haja / William N Lanzilotta / Michael W W Adams / Huilin Li / ![]() |
PubMed 要旨 | The cytoplasmic hydrogenase I (SHI) from the hyperthermophilic archaeon Pyrococcus furiosus belongs to the group III hydrogenase family. SHI oxidizes NADPH rather than NADH to reduce protons and ...The cytoplasmic hydrogenase I (SHI) from the hyperthermophilic archaeon Pyrococcus furiosus belongs to the group III hydrogenase family. SHI oxidizes NADPH rather than NADH to reduce protons and evolve hydrogen gas, and because of this property, coupled with its high thermal stability, the enzyme holds great potential for economical hydrogen production. Despite decades of efforts, the SHI structure has remained unknown. Here, we report the cryoelectron microscopic (cryo-EM) structures of the heterotetrameric SHI holoenzyme (αδβγ). SHI is a symmetric dimer of two individually functional heterotetramers. SHI-αδ resembles the standard [NiFe] hydrogenase, and SHI-βγ function as the NADPH oxidoreductase. SHI-β contains three [4Fe-4S] clusters that relay electrons from NADPH in SHI-γ to the catalytic [NiFe] cluster in SHI-αδ for H production. These structures will guide the adaptation of this unique enzyme for biotechnological applications. |
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手法 | EM (単粒子) / X線回折 |
解像度 | 2.6 - 3.53 Å |
構造データ | EMDB-49340: Cryo-EM map of the Pyrococcus furiosus SHI complex EMDB-49341: Cryo-EM composite map of the NADPH-bound Pyrococcus furiosus SHI complex ![]() EMDB-49342: Cryo-EM consensus map of the NADPH-bound Pyrococcus furiosus SHI complex ![]() EMDB-49343: Cryo-EM focus map of the NADPH-bound Pyrococcus furiosus SHI complex ![]() PDB-9e15: ![]() PDB-9e1j: |
化合物 | ![]() ChemComp-SF4: ![]() ChemComp-FCO: ![]() ChemComp-NI: ![]() ChemComp-PO4: ![]() ChemComp-MG: ![]() ChemComp-HOH: ![]() ChemComp-CL: ![]() ChemComp-FES: ![]() ChemComp-FAD: ![]() ChemComp-NFU: ![]() ChemComp-NAP: |
由来 |
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![]() | LYASE / Ni-Fe hydrogenase / ELECTRON TRANSPORT / hydrogen production / [NiFe] hydrogenase / cryo-EM structure |