I am using RosettaScripts for some loop modelling and would like to apply the FastRelax protocol to a loop region in my structure without the moves propagating down the chain.
I know that it is possible to set up a MoveMap so that only some degrees of freedom are turned on e.g.
<FastRelax name=frel scorefxn=SFXN_relax repeats=8 >
<Chain number=1 chi=0 bb=0 /> Turns off all degrees of freedom for chain A
<Span begin=69 end=76 chi=1 bb=1/> This line turns the side-chain (chi) and backbone (bb) freedoms back on
however this propagates moves down the chain so that it is not a local move. I tried adding a chainbreak to my protocol but this does not seem to behave as expected (I've probably misunderstood something).
Is there a simple way of applying FastRelax (in both dihedral and cartesian space) to a local loop region? I've noticed there is a LoopRelaxMover but this is not documented so I'm not clear on how to use it.
Any help would be greatly appreciated!