Re: [gmx-users] Position restrained energy minimization

2019-02-07 Thread Peter Kroon
That will still allow peptide atoms to move (if only a little). AFAIK Gromacs is not really fit for rigid body studies, but you can set all bonds and angles to constraints (mdp option: constraints=all-angles). This may or may not work. Torsion angles will still be free to rotate though. From the

Re: [gmx-users] Position restrained energy minimization

2019-02-07 Thread Quyen Vu
When you run EM with -v directive, you will see how much is the largest force value applies to your atom. Try to estimate whether that force constant was enough to keep your atom fix because if your structure has any overlap, force can be very large On Thu, Feb 7, 2019 at 6:40 AM Ashraya

[gmx-users] Position restrained energy minimization

2019-02-06 Thread Ashraya Ravikumar
Hi, I am trying to do position restrained energy minimization of a solvated peptide, where the peptide is restrained but the solvent is free to move. But I do see the positions of the atoms of the peptide change. I increased the force value in position restraint file to 1 from 1000, but it

[gmx-users] Position restrained energy minimization

2019-02-06 Thread Ashraya Ravikumar
Hi, I am trying to do position restrained energy minimization of a solvated peptide, where the peptide is restrained but the solvent is free to move. But I do see the positions of the atoms of the peptide change. I increased the force value in position restraint file to 1 from 1000, but it