CRANKITE is a suite of programs for simulating backbone conformations of polypeptides and proteins. The core of the suite is an efficient Metropolis Monte Carlo sampler of backbone conformations in atomic details (see animation). In contrast to other programs relying on local Metropolis moves in the space of dihedral angles, the sampler utilizes local crankshaft rotations of rigid peptide bonds in Cartesian space. The sampler allows fast simulation and analysis conformational changes and secondary structure for protein of average length. The software is licensed under GPL v2.

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