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Fig. 2 | BMC Bioinformatics

Fig. 2

From: Enumeration and comprehensive in-silico modeling of three-helix bundle structures composed of typical αα-hairpins

Fig. 2

The handedness of helix-helix packing forced by typical αα-hairpin motifs. A Definition of φHH B Definition of packing handedness C The distribution of φHH for GB, GBB, and BAAB hairpins. The horizontal axis represents the values of the helix-helix dihedral angle φHH, and the vertical axis corresponds to the number of loop fragments in the dihedral bins. The barplots are binned every 18°, and the orange dotted line indicates the median value of the distribution. D Representative structures for the GB, GBB, and BAAB hairpins. The structures show the GB and BAAB hairpins are related to left-handed packing, and GBB is related to right-handed packing. The α-helices are shown as cartoons and are colored in the blue-white-red gradient from the N to the C-terminus

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