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Figure 3
Comparison of loop A in AmSP, BaSP and BaSP-Q345F (in red, grey and orange, respectively; corresponding to PDB entries 7znp, 1r7a and 5c8b). (a) View of loop A from above. (b) The same view as the top left with the electron-density maps of PDB entry 7znp corresponding to the 2Fo − Fc map at a 3σ cutoff (blue, representing electron density) and to the Fo − Fc difference map at a 3σ cutoff (green, representing disagreement between the model and the electron density). (c) The same view with the overlay of the residues and the electron-density maps of PDB entry 7znp. (d) View of loop A from its C-terminal side. (e) Emphasis on the flip of Tyr352. (f) Emphasis on the α-helix which precedes loop B. |