Download MendeleyCrystal Structure of HydF Scaffold Protein Provides Insights into [FeFe]-Hydrogenase Maturation.
Cendron, L., Berto, P., D'Adamo, S., Vallese, F., Govoni, C., Posewitz, M.C., Giacometti, G.M., Costantini, P., Zanotti, G.(2011) J Biol Chem 286: 43944-43950
- PubMed: 22057316
- DOI: https://doi.org/10.1074/jbc.M111.281956
- Primary Citation of Related Structures:
3QQ5 - PubMed Abstract:
[FeFe]-hydrogenases catalyze the reversible production of H2 in some bacteria and unicellular eukaryotes. These enzymes require ancillary proteins to assemble the unique active site H-cluster, a complex structure composed of a 2Fe center bridged to a [4Fe-4S] cubane. The first crystal structure of a key factor in the maturation process, HydF, has been determined at 3 Å resolution. The protein monomer present in the asymmetric unit of the crystal comprises three domains: a GTP-binding domain, a dimerization domain, and a metal cluster-binding domain, all characterized by similar folding motifs. Two monomers dimerize, giving rise to a stable dimer, held together mainly by the formation of a continuous β-sheet comprising eight β-strands from two monomers. Moreover, in the structure presented, two dimers aggregate to form a supramolecular organization that represents an inactivated form of the HydF maturase. The crystal structure of the latter furnishes several clues about the events necessary for cluster generation/transfer and provides an excellent model to begin elucidating the structure/function of HydF in [FeFe]-hydrogenase maturation.
Organizational Affiliation:
Department of Biological Chemistry, University of Padua, 35131 Padua, Italy.
