Re: [gmx-users] Potential issue using acpype to convert amber topology to gromacs

2018-02-15 Thread Easton J . W .
Hi Justin, That makes sense, I've found where the parameters are Thanks for your help James From: gromacs.org_gmx-users-boun...@maillist.sys.kth.se on behalf of Justin Lemkul Sent: 14 February 2018 22:31:07 To: gmx-us...@gromacs.org Subject: Re: [gmx-user

Re: [gmx-users] Potential issue using acpype to convert amber topology to gromacs

2018-02-14 Thread Easton J . W .
Hi Justin, Many thanks for the detailed reply. I just wanted to check that it doesn't matter that the A2C and A3C are not present in the bonded and non-bonded itp files for the forcefield? Should this not have given an error? Kind regards, James From: gromacs.

Re: [gmx-users] Potential issue using acpype to convert amber topology to gromacs

2018-02-14 Thread Easton J . W .
Thanks Justin, Will this effect the interactions (both bonded and non-bonded) that these atoms have, as their atom types are not in the forcefield itp files? Kind regards, James From: gromacs.org_gmx-users-boun...@maillist.sys.kth.se on behalf of Justin Le

[gmx-users] Potential issue using acpype to convert amber topology to gromacs

2018-02-14 Thread Easton J . W .
Hi, I've used acpype to convert my prmtop and inpcrd files into gromacs format. I'm using the amber14sb forcefield. At the top of the top file generated, is an [atomtypes] section. Most of the atoms in this section were present in the atomtypes.atp and ffnonbonded.itp so I deleted them howev

Re: [gmx-users] Creating cyclic peptides

2017-10-17 Thread Easton J . W .
Dear Maud, Thanks, I will give that a try, Regards, James From: gromacs.org_gmx-users-boun...@maillist.sys.kth.se on behalf of Maud Jusot Sent: 17 October 2017 16:10:42 To: gmx-us...@gromacs.org Subject: Re: [gmx-users] Creating cyclic peptides Dear Jame

Re: [gmx-users] Creating cyclic peptides

2017-10-17 Thread Easton J . W .
Thanks Justin, Is there anyway of getting it to work using an AMBER forcefield as well? Kind regards, James From: gromacs.org_gmx-users-boun...@maillist.sys.kth.se on behalf of Justin Lemkul Sent: 17 October 2017 15:46:27 To: gmx-us...@gromacs.org Subject

[gmx-users] Creating cyclic peptides

2017-10-17 Thread Easton J . W .
Hi, I'm trying to create a cyclic hexapeptide using pdb2gmx. I want to be able to do this using either an AMBER or CHARMM forcefield. Initially I have been following the instructions in this link, https://mailman-1.sys.kth.se/pipermail/gromacs.org_gmx-users/2012-September/074609.html Howev