Re: [gmx-users] Replica Exchange with Solute Tempering

2013-10-26 Thread David Osguthorpe
On Sat, Oct 26, 2013 at 06:06:59PM -0400, Michael Shirts wrote: > Hi, all- > > Rest essentially scales the solute-solvent interactions, but maintains > the solute-solute interactions. This can be done solely with > Hamiltonian replica exchange, which is in 4.6. It's a bit tricky, > though. We pl

[gmx-users] Replica Exchange with Solute Tempering

2013-10-26 Thread David Osguthorpe
Hi Ive been looking for a sample input for a REST simulation but so far have not been able to find one. Does anybody have an example to share? Ive seen the tutorial by Mark which mentions REST but I dont see this included in the archived examples. Am I missing something? Thanks for any help

[gmx-users] REMD protein-ligand separation

2009-01-07 Thread David Osguthorpe
Hi, I have performed a REMD simulation of a protein and ligand in water as usual the protein and ligand get separated by symmetry operations however attempts to fix this using trjconv and the standard recipes (eg. -pbc whole, -pbc nojump) do not appear to be working in particular after using

Re: [gmx-users] single-precision *.tpr data after a double-precision run

2008-08-07 Thread David Osguthorpe
> > This means that although the minimization was run in double precision, > the atomic configuration is saved in single precision (the last two > decimal places are not used). Does this mean that each time the > optimized *.gro file is re-read, it needs to optimize these last two > decima

Re: [gmx-users] Normal Mode Analysis in Double-Precision

2008-07-31 Thread David Osguthorpe
> >Could it be that this, second, compilation might have caused some >problems -- I had GROMACS compiled in single-precision, and it worked >fine -- could compiling in double-precision after the initial >single-precision overrun some files? I'm not sure anymore... > from experien

Re: [gmx-users] Re: Question about Berendsen thermostat and Nose-Hoover temp coupling ([EMAIL PROTECTED])

2008-07-24 Thread David Osguthorpe
>> See: http://arxiv.org/abs/0803.4060. It might be nice to replace for those who havent already - download the paper - it contains a background with all the references you need for thermostats Andersons "landmark" paper in 1980 (as I gave) - Noses 1984 paper etc. David __

Re: [gmx-users] Question about Berendsen thermostat and Nose-Hoover temp coupling

2008-07-23 Thread David Osguthorpe
On Tue, Jul 22, 2008 at 11:16:21PM -0400, [EMAIL PROTECTED] wrote: > Thanks David for sharing your knowledge, especially the note that for > further information one can refer to the literature that was written > around the time that these thermostats were released. I have a > question though:

Re: [gmx-users] Question about Berendsen thermostat and Nose-Hoover temp coupling

2008-07-22 Thread David Osguthorpe
On Mon, Jul 21, 2008 at 11:46:00PM -0400, Justin A. Lemkul wrote: > > I too rely heavily on the Berendsen methods for T- and P-coupling, and have > always found them satisfactory. I have not seen much beyond the casual > references to the fact that N-H T-coupling and Parrinello-Rahman P-couplin

Re: [gmx-users] creating trajectory with ligand close to the protein

2008-02-23 Thread David Osguthorpe
On Sun, Feb 24, 2008 at 01:35:51PM +1100, Mark Abraham wrote: > > > >Ive been using trjconv but it seems to be failing for a case where the > >protein switches > >image in the trajectory but the ligand does not. > > Check out trjconv -h, and if none of the options works, please describe > why th

[gmx-users] creating trajectory with ligand close to the protein

2008-02-23 Thread David Osguthorpe
Hi, Can anybody tell me what is the best way to re-write a trajectory run with periodic boundary conditions such that a molecule (eg. the protein) is chosen as the reference and every other molecule in the system (eg. ligands) is transformed such that its periodic image closest to the referenc

Re: [gmx-users] twin range and switched cutoffs energy differences

2008-02-22 Thread David Osguthorpe
On Thu, Feb 21, 2008 at 02:16:39PM +1100, Mark Abraham wrote: > David Osguthorpe wrote: > >Hi, > > > >I am having a problem understanding the GROMACS implementation of cutoffs > >and switching functions - at least Im getting results I cant make sense of. > > Ha

[gmx-users] twin range and switched cutoffs energy differences

2008-02-20 Thread David Osguthorpe
Hi, I am having a problem understanding the GROMACS implementation of cutoffs and switching functions - at least Im getting results I cant make sense of. I have been running dynamics of a protein-water system rhombic dodecahedron periodic boundary system with the twin range cutoff scheme. I have