Figure 6.

Shape models of Hfq_Ec. (A) Surface representation of ab initio model. (B) Calculated scattering curve of ab initio model (blue) overlaid with experimental X-ray scattering data, inserted is the pair-distribution function for Hfq_Ec65 (grey) and full-length Hfq_Ec (blue). (C) Superimposition of the three best rigid-body Hfq_Ec models from three iterations of modeling (red, gold and green). In the center, the crystal structure of the Hfq_Ec (amino acids 6–65) hexameric core is represented as grey ribbons and the N-termini as grey spheres. The ab initio model is represented as blue spheres in the background. (D) Calculated scattering curves to a maximum range of momentum transfer (s) of 0.4 Å⁻¹ for the three best rigid-body models (corresponding in red, gold and green).