Re: [gmx-users] g_hbond tool question

2014-11-19 Thread Erik Marklund
Dear Carlos, You get a double contribution from MainChain and SideChain in this way, don't you? Kind regards, Erik On 19 Nov 2014, at 03:00, Carlos Navarro Retamal cnava...@utalca.cl wrote: Dear gromacs users, I’m studying the hydrogen bond interaction between a protein and different

Re: [gmx-users] adding ions in Gromacs 4.6.5

2014-11-19 Thread soumadwip ghosh
Justin, I have used the paramchem software as suggested by you. I submitted my pdb file and CGENFF gave a .str file as output. Now could you please tell me how to proceed to obtain the .itp file? Also is it sensible to use SWISSPARAM since it gives .itp from .mol2 directly? Once I have

Re: [gmx-users] Tricky implementation of REST in GROMACS 4.6.5

2014-11-19 Thread Carlo Martinotti
Thank you Justin,unfortunatly i tried to use your solution, but there are some problems with free energy use in REST. The first is that free energy interpolate from state A to state B, but can't manage to interpolate proper multiple dihedrals, so i don't know how to treat dihedrals with this

Re: [gmx-users] Replicating and equilibrating DPPC 128 lipid. pdb

2014-11-19 Thread Catarina A. Carvalheda dos Santos
Hi Priya, You can use genconf with the option -box to replicate your box (in this case your membrane) as many times as you want in the x,y and z directions. Keep in mind that -box only deals with integers (number of boxes), so something like -box 1.5 2.5 1 will be equivalent to -box 2 3 1. If the

Re: [gmx-users] Replicating and equilibrating DPPC 128 lipid. pdb

2014-11-19 Thread Justin Lemkul
On 11/19/14 6:16 AM, Catarina A. Carvalheda dos Santos wrote: Priya, Did you perform at least one energy minimization step before that? Because you should, one or several, to remove unfavorable interactions. ...and even more importantly: were the DPPC whole (or at least made whole) prior

Re: [gmx-users] Replicating and equilibrating DPPC 128 lipid. pdb

2014-11-19 Thread Priya Das
I used dppc.128 (128 DPPC lipids and 3655 water molecules) for replicating . -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For

Re: [gmx-users] Tricky implementation of REST in GROMACS 4.6.5

2014-11-19 Thread Mark Abraham
On Wed, Nov 19, 2014 at 10:38 AM, Carlo Martinotti carlo.martino...@studenti.unimi.it wrote: Thank you Justin,unfortunatly i tried to use your solution, but there are some problems with free energy use in REST. The first is that free energy interpolate from state A to state B, but can't

Re: [gmx-users] adding ions in Gromacs 4.6.5

2014-11-19 Thread Justin Lemkul
On 11/19/14 4:33 AM, soumadwip ghosh wrote: Justin, I have used the paramchem software as suggested by you. I submitted my pdb file and CGENFF gave a .str file as output. Now could you please tell me how to proceed to obtain the .itp file? Also is it sensible Use our converter;

Re: [gmx-users] Error while running free energy simulation.

2014-11-19 Thread vivek sharma
Dear Justin, Thanks for ypour reply. My runs are getting failed at multiple lambda values, say 4 out of 21. For some cases, these runs go fine when I change pcouple to berendsen. Is it acceptable to use berendsen instead of PR for such simulations. I guess I need to do more equilibration on my

Re: [gmx-users] Changing constraints algorithm.

2014-11-19 Thread Mark Abraham
Hi, That work treats the constraint algorithm as a black box that accurately computes the Lagrangian multipliers; the abstract is worded as SHAKE-type constraints etc. So the properties of any other method that computes the multipliers satisfactorily (e.g. LINCS) follow immediately. Mark On

Re: [gmx-users] Tricky implementation of REST in GROMACS 4.6.5

2014-11-19 Thread Szilárd Páll
FYI: Last time I tried the HREX using the PLUMD2 patch (this was about a year ago), I did not need to did any kind of temperature tricks at all! -- Szilárd On Tue, Nov 18, 2014 at 4:44 PM, Carlo Martinotti carlo.martino...@studenti.unimi.it wrote: I'm trying to run a hamiltonian REMD simulation

Re: [gmx-users] Error while running free energy simulation.

2014-11-19 Thread Mark Abraham
On Wed, Nov 19, 2014 at 2:50 PM, vivek sharma viveksharma.i...@gmail.com wrote: Dear Justin, Thanks for ypour reply. My runs are getting failed at multiple lambda values, say 4 out of 21. For some cases, these runs go fine when I change pcouple to berendsen. Is it acceptable to use berendsen

[gmx-users] problem in energy minimization of protein in POPC lipid membrane

2014-11-19 Thread Padmani Sandhu
Hello all, Do we need to create a box using editconf before using grompp to carry out energy minimization between shrinking steps.??? Thanks, Padmani -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting!

Re: [gmx-users] Installing gromacs 5.0.2 double precision with shared fftw libraries

2014-11-19 Thread Mark Abraham
On Wed, Nov 19, 2014 at 7:25 PM, Soren Wacker swac...@ucalgary.ca wrote: Hi, I have trouble to install gromacs 5.0.2 in double precision with shared fftw libraries. During the cmake process I get: Could not find fftw3 library named libfftw3, please specify its location in CMAKE_PREFIX_PATH

Re: [gmx-users] Installing gromacs 5.0.2 double precision with shared fftw libraries

2014-11-19 Thread Mark Abraham
Hi, You did choose to get involved with details, rather than using CMAKE_PREFIX_PATH... :-) Mark On Wed, Nov 19, 2014 at 11:05 PM, Soren Wacker swac...@ucalgary.ca wrote: So, when I compile in double precision it must be -DFFTW_INCLUDE_DIR=~/Programme/fftw3/double/include \ when it is

Re: [gmx-users] Installing gromacs 5.0.2 double precision with shared fftw libraries

2014-11-19 Thread Carsten Kutzner
On 19 Nov 2014, at 20:03, Soren Wacker swac...@ucalgary.ca wrote: Hi Carsten! Like this?? -DCMAKE_PREFIX_PATH=“/global/software/boost/gcc:~/Programme/fftw3/double/ \ The above line should be right, I assume. Carsten or like this? -DCMAKE_PREFIX_PATH=/global/software/boost/gcc \