The [FeFe]-hydrogenase maturase HydF from Clostridium acetobutylicum contains a CO and CN- ligated iron cofactor

Ilka Czech, Alexey Silakov, Wolfgang Lubitz, Thomas Happe

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Biosynthesis of the [FeFe] hydrogenases active site (H-cluster) requires three maturation factors whose respective roles are not understood yet. The clostridial maturation enzymes (CaHydE, CaHydF and CaHydG) were homologously overexpressed in their native host Clostridium acetobutylicum. CaHydF was able to activate Chlamydomonas reinhardtii [FeFe] hydrogenase apoprotein (CrHydA1apo) to almost 100% compared to the native specific hydrogen evolution activity. Based on electron paramagnetic resonance spectroscopy and Fourier-transform infrared spectroscopy data the existence of a [4Fe4S] cluster and a CO and CN- ligand coordinated di-iron cluster is suggested. This study contains the first experimental evidence that the bi-nuclear part of the H-cluster is assembled in HydF.

Original languageEnglish (US)
Pages (from-to)638-642
Number of pages5
JournalFEBS Letters
Issue number3
StatePublished - Feb 5 2010

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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