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Figure 2
Comparison of structurally similar proteins: (a) electron-bifurcating [FeFe] hydrogenase from Thermotoga maritima (PDB entry 7p5h; Furlan et al., 2022BB30), (b) respiratory complex I from Thermus thermophilus (PDB entry 3iam; Berrisford & Sazanov, 2009BB301) and (c) NAD+-reducing [NiFe] hydrogenase from Hydrogeno­philus thermoluteolus (PDB entry 5xf9; Shomura et al., 2017BB91). The upper images show the protein and subunit structures. The lower images show the arrangements of the cofactors, active sites and iron–sulfur clusters.

IUCrJ
Volume 10| Part 5| September 2023| Pages 544-554
ISSN: 2052-2525
https://doi.org/10.1107/S2052252523006437