Fig. 5
The AhlC soluble tetramer buries its hydrophobic heads. a Cartoon and schematic structures of AhlC Form 1 subunits P and P’ (cyan) and Q and Q’ (purple), coloured dark (N-terminus) to light (C-terminus). b Tetrameric assembly of AhlC, hydrophobic heads of α3 and α4 are highlighted (red) in subunit P and form leucine zipper interactions with α5 in the tails of both subunit Q and subunit P’. Hydrophobic residues are coloured white. c Superposition of YaxA (grey) with the two independent subunits of subunit P and Q of the AhlC tetramer, as aligned by the DALI server 59, showing higher structural similarity to subunit Q
