Mechanical coupling in the nitrogenase complex
Fig 3
Maximum mechanical coupling M of (A) residues in α1β1 to any residue in Fe1 and (B) residues in Fe2 to any residue in Fe1 in ATP-bound complex. The ATP analogues, [4Fe-4S] clusters, P-clusters, and FeMo-co are shown in mesh surface. Residue 186–190 in β1 are highlighted in spheres in (A); one α-helix and three β-sheets in each monomer of Fe2 appear red in (B) (following the numbering in the 2AFK PDB file).