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Performs a single fragment insertion move on the pose. Respects the restrictions imposed by the user-supplied MoveMap and underlying kinematics of the pose (i.e. FoldTree ). By default, all backbone torsions are movable. The MoveMap parameter is used to specify residues that should remain fixed during the simulation. Insertion positions are chosen in a biased manner in order to have roughly equivalent probability of acceptance at each allowable insertion position. This has traditionally been referred to as "end-biasing." Once an insertion position has been chosen, a Policy object is responsible for choosing from among the possible fragments contained in the fragment file. Currently, two policies are supported-- "uniform" and "smooth." The former chooses uniformly amongst the set of possibilities. The latter chooses the fragment that, if applied, causes minimal distortion to the pose.
In order to be useful, SingleFragmentMover should be paired with a Monte Carlo-based mover. If you're folding from the extended chain, "GenericMonteCarloMover" is a common choice. When folding from a reasonable starting model, "GenericMonteCarloMover" is *not* recommended-- it unilaterally accepts the first move. A simplified version of the ClassicAbinitio protocol is recapitulated in demo/rosetta_scripts/classic_abinitio.xml.
Input is *not* restricted to monomers. Oligomers work fine.
<SingleFragmentMover name=(&string) fragments=(&string) policy=(uniform &string)>
<MoveMap>
<Span begin=(&int) end=(&int) chi=(&int) bb=(&int)/>
</MoveMap>
</SingleFragmentMover>