Figure 1
(a) Ribbon diagram of a single subunit of B. anthracis DeoD. The α-helices and β-strands are labelled in sequential order. The chain is ramped in rainbow colours from the N-terminus (blue) to the C-terminus (red). The structure figures were drawn with PyMol (DeLano, 2002). (b) Ribbon diagram of purine nucleoside phosphorylase. There are two types of interactions between subunits. Between A and F, B and D, and C and E there are extensive interactions to form dimers through amino acids on helices α3 and α5, strands β6 and β7 and loops α3–α4, β8–α6 and α3–β6. Interactions between subunits A and D, C and F, and B and E are based on the contribution of amino acids from helices α1, α2 and α3 and loops β2–β3, α2–β4 and α5–β7; these build the dimers into a hexamer. |