id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
6381	Add a tug command	Tom Goddard	Tom Goddard	"Would be nice to have a tug command that would allow tugging specified atoms to target locations for a specified number of time steps.  The use case I am thinking of is to place a peptide linker between two fixed ends, for example ferritin (PDB 5n5f) to encapsulin (PDB 7oe2) as done in the encapsulin-ferritin VR demo

   https://www.rbvi.ucsf.edu/chimerax/data/vr-nih-feb2022/ferritin.html

It would be powerful if the tug mouse mode could also restrain specified residues to current positions or to positions of other residues from another model.  This would allow an interactive loop modeling capability.  Currently tugging with no restraints does not provide a way to keep end residues from moving.

ISOLDE has exactly these capabilities.  Would be nice to have a simpler standalone capability."	enhancement	closed	moderate		MD/Ensemble Analysis		fixed		Tristan Croll				all	ChimeraX