Mechanical coupling in the nitrogenase complex
Fig 4
Change in RMSF of the MoFe protein upon ATP hydrolysis.
The change is shown as deviation of the RMSF of the MoFe protein in the ADP-bound complex relative to the ATP-bound complex reported as a color scale and is projected on the ribbon representation of the protein. The positive changes, whereby the ADP-bound complex shows larger flexibility than the ATP-bound complex, are shown in red, and the negative values are shown in blue. For clarity of representation, the RMSF change for the Fe proteins is not color-coded. The ATP analogues, [4Fe-4S] clusters, P-clusters, and FeMo-co are shown in mesh surface. Residues 186–190 in β1 are highlighted as space-filling structures (spheres). Residues at Fe protein/MoFe protein interface with large RMSF change upon ATP hydrolysis appear in orange or red.