[gmx-users] Removal of global rotation/translation

[George Patargias]

Dear Gromacs list

I would like to ask a question regarding the global rotation and
translation removal in GROMACS.

In my mdp file I use the following options:
; mode for center of mass motion removal
comm-mode                = Linear
; number of steps for center of mass motion removal
nstcomm                  = 10
; group(s) for center of mass motion removal
comm-grps                =

Are these options ensuring that global rotation and translation is removed
every 10 steps?

Is the trjconv command (as issued below) also removing global rotation and
translation?

trjconv -f traj_Total.xtc -s prod1.tpr -o rot+trans.xtc -fit rot+trans

In which case is the "-center" option in trjconv is used?

Thanks.

George