Figure 3. The σ⁷⁰₄/Rsd interactions.

A) Schematic diagram denoting molecular interactions between Rsd and σ⁷⁰₄. Van der Waals interactions (<4 Å) are listed on the left, polar interactions (hydrogen bonds, salt bridges) are listed on the right.

B) Stereo view of the σ⁷⁰₄/Rsd interface. Protein α-carbon backbones are shown as worms, color-coded as in Figure 1. The two α-helices of Rsd harboring amino acid residues that interact with σ⁷⁰₄ (H3 and H4) are labeled. Amino acid side chains that participate in interprotein interactions are shown, with carbon atoms color-coded as the backbone worm, nitrogen atoms colored blue, and oxygen atoms colored red. Interprotein polar interactions (hydrogen bonds or salt bridges) are indicated by dashed lines.