Nitrogenase metalloclusters

Figure L Structural models for the nitrogenase metalloclusters and coordinating ligands, (a) the oxidized state of the P-cluster. (b) the dithionite reduced P form of the P-cluster. (c) FeMo-cofactor. Protein Data Bank (If 12) coordinate sets 2MIN and SMINwere usedfor (a) and (bf(cf respectively. Molecular figures in this chapter were prepared with MOLSCRIPT(13).

Figure 17.8 Ribbon diagrams of the heterodimeric MoFe-protein (left) and homodimeric Fe-proteins of nitrogenase (right). The a- and P-subunits to the left of the MoFe-protein are shown in light and dark shading, respectively, while the metalloclusters are shown as dark space-filling models on the right side. The two subunits of the Fe-protein are shown in light and dark shading, with the 4Fe-4S cluster at the dimer interface as a space-filling model. (From Rees et al., 2005. Reproduced with permission of the Royal Society.)...

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