Ribbon representation of the overall structure of Fha30. The helix β-sheets PB1, PB2, and PB3, the β-hairpin β7/β8, and the β-sheet β16/β25 are shown. The three β-strands, β1, β2, and β3, involved in the N-terminal β-helix capping are represented in red. N- and C-terminal extremities are also indicated.