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The mechanism by which the [NiFe4S4] cluster of carbon monoxide dehydrogenases (CODHs) catalyses CO2 reduction is poorly understood. Now the structures of all catalytically relevant states of a CODH a...

Nature Catalysis, Published online: 01 August 2025; doi:10.1038/s41929-025-01388-5The mechanism by which the [NiFe4S4] cluster of carbon monoxide dehydrogenases (CODHs) catalyses CO2 reduction is poorly understood. Now the structures of all catalytically relevant states of a CODH are solved, revealing the dynamics of the cluster during turnover and the role of Ni in CO2 activation.