Figure 2
From: Novel dimeric β-helical model of an ice nucleation protein with bridged active sites
Modelling of Pb INP. A) The β-roll (residues 330-348) from alkaline protease (PDB 1KAP) was used as the starting template. Carbon atoms from the central β-strands of the structure are coloured green, while carbons from the Ca2+-binding turns are coloured yellow. Oxygen atoms are coloured red, nitrogen atoms blue, and Ca2+ ions are shown as red spheres. Arrows indicate β-strands, with x representing any residue and u representing hydrophobic residues. B) The excised β-strands altered to conform to the sequence of Pb INP. The consensus sequence of each strand is indicated.