Figure 4
The a/c dimer interface. GfasPurple (purple) and amilCP (blue) are overlapped and shown as one panel due to their high sequence identity (98.2%). For all four proteins, the secondary chain is shown in a lighter colour. Dashed lines represent salt bridges or hydrogen bonds. (a) Surface representation of proteins showing the C-termini of the chains in the homodimer forming a symmetrical `embrace'. For gfasPurple and amilCP, the surface of amilCP is shown. (b) Interactions at the dimer interface viewed from the opposite surface to the C-termini shown in (a). (c) A detailed view into deeper interfacing interactions in the same plane as in (b). Water molecules forming a solvent channel are shown as red spheres and the chromophore is labelled `chr'. Residues are labelled in either (b) or (c), where they may or may not be visible in both panels. |