Publications

Shedding Light on Proton and Electron Dynamics in [FeFe] Hydrogenases

Lorent, C. and Katz, S. and Duan, J. and Kulka, C.J. and Caserta, G. and Teutloff, C. and Yadav, S. and Apfel, U.-P. and Winkler, M. and Happe, T. and Horch, M. and Zebger, I.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume: 142 Pages: 5493-5497
DOI: 10.1021/jacs.9b13075
Published: 2020

Abstract
[FeFe] hydrogenases are highly efficient catalysts for reversible dihydrogen evolution. H2 turnover involves different catalytic intermediates including a recently characterized hydride state of the active site (H-cluster). Applying cryogenic infrared and electron paramagnetic resonance spectroscopy to an [FeFe] model hydrogenase from Chlamydomonas reinhardtii (CrHydA1), we have discovered two new hydride intermediates and spectroscopic evidence for a bridging CO ligand in two reduced H-cluster states. Our study provides novel insights into these key intermediates, their relevance for the catalytic cycle of [FeFe] hydrogenase, and novel strategies for exploring these aspects in detail. Copyright © 2020 American Chemical Society.

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