[gmx-users] Non Standard residues moving Away

2017-08-07 Thread Souvik Dey
Hi, I am trying to simulate a Protein Ligand system. Now, my system has some non standard residues and I standardized them for AMBER forcefield using ACPYPE. However, when I assemble the gro files of the Proten generated from pdb2gmx and the gro files obtained from ACPYPE, I see that they are not

Re: [gmx-users] Non Standard residues moving Away

2017-08-07 Thread Mark Abraham
Hi, The only thing that matters is the order of the molecules, residues and atoms, and preferably naming. These must match between topology and coordinates when you eg use grompp. The point of doing an MD simulation is generally to keep the topology constant while changing the coordinates. So give

Re: [gmx-users] Non Standard residues moving Away

2017-08-07 Thread Souvik Dey
Hi, Grompp is running successfully without any errors. But my protein and ligands are very far away from each other. So, what I fear is that the interactions among them may not be well accounted for by MD simulations. On Mon, Aug 7, 2017 at 7:53 PM, Mark Abraham wrote: > Hi, > > The only thing

Re: [gmx-users] Non Standard residues moving Away

2017-08-07 Thread Justin Lemkul
On 8/7/17 3:01 PM, Souvik Dey wrote: Hi, Grompp is running successfully without any errors. But my protein and ligands are very far away from each other. So, what I fear is that the interactions among them may not be well accounted for by MD simulations. If the coordinates that came out of