Hi All,
I already done the MD production so I want to analyse the helical
structure of my protein by using do_dssp program.The command is like
below :
do_dssp -s md_water50.tpr -f md_water50.trr -n mainchain.ndx -sc
dssp_scount.xvg -a dssp_area.xvg -ta dssp_totarea.xvg -aa
dssp_averarea.xvg
but
Hi,
protein have 2 positive chage, I use PRODRG built .gro of CH3C00H, and add
two molecular CH3C00H, four molecular NA into system.
At energy minimization step, after steep, when I use cg, Fatal error:
DD cell 1 4 0 could only obtain 14 of the 16 atoms that are connected via
constraints from the
Dear gmx-users,
I am experiencing some strange things while performing mdrun. I am running
a CG simulation and it is terminating with LINCS warnings after approx.
500ns of simulation. If I restart it with the check point file, then its
running with out any errors. Is my simulation is reliable?? I a
Hi,
I would like to use Gromacs for MD simulation of biomolecules. But I am not
able to download any of the source files from the link
http://www.gromacs.org/Downloads
Can anyone please help.
Thanks and regards,
Maithry
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Hi,
I recommend to run the regressiontests. The simplest way is to build
GROMACS with cmake -DREGRESSIONTEST_DOWNLOAD, and run make check.
See
http://www.gromacs.org/Documentation/Installation_Instructions#.c2.a7_4.12._Testing_GROMACS_for_correctness
for more details.
Roland
On Thu, Jun 6, 2013
Easiest, naïve way that I can see is to do the simulation in blocks, and change
the output settings within the mdp file used as required for each block.
Catch ya,
Dr. Dallas Warren
Drug Discovery Biology
Monash Institute of Pharmaceutical Sciences, Monash University
381 Royal Parade, Parkville V
On 6/6/13 10:00 PM, Badamkhatan wrote:
Dear GMX-users
Recently i got this error and note from my MD2 simulation. I'm solvating
1-octanol to 1-octanol and calculating free energy differences. This is the
last step of my calculation and previous steps are looking fine. Basically i
followed Justi
Dear GMX-users
Recently i got this error and note from my MD2 simulation. I'm solvating
1-octanol to 1-octanol and calculating free energy differences. This is the
last step of my calculation and previous steps are looking fine. Basically i
followed Justin's free energy tutorial.
Here is
Note:
the information on .log as follows:
Initializing Domain Decomposition on 2 nodes
Dynamic load balancing: no
Will sort the charge groups at every domain (re)decomposition
Initial maximum inter charge-group distances:
two-body bonded interactions: 0.598 nm, LJ-14, atoms 942 950
multi-body bon
Gromacs users:
I have just built and installed gromacs-4.6.1 on my Xeon 5500 compute cluster
running Centos 5. The installation was done with gcc 4.7.0
I have run a simple test (the old tutor/gmxdemo) which fails at the first mdrun
step with a segmentation fault. The command line for this ste
On 6/6/13 11:52 AM, Nilesh Dhumal wrote:
I checked the line number in .top file. Its not reading any dihedral
parameter defined in .itp file.
Well, if it's not reading parameters, then that explains the error that tells
you there are no parameters defined.
-Justin
On 6/6/13 9:22 AM, Nil
I checked the line number in .top file. Its not reading any dihedral
parameter defined in .itp file.
NIlesh
>
> On 6/6/13 9:22 AM, Nilesh Dhumal wrote:
>> Hello,
>>
>> I am getting "No default Ryckaert-Bell. types" error for grompp.
>>
>> I have define all this parameter in .itp file
>>
>> Here i
On 6/6/13 9:22 AM, Nilesh Dhumal wrote:
Hello,
I am getting "No default Ryckaert-Bell. types" error for grompp.
I have define all this parameter in .itp file
Here is .itp file
; For parameters see J. Phys. Chem. A. 2002, 106, 1074-1080
; Derived from parsing of runfiles/alat.top.orig
;[ de
On 6/6/13 5:17 AM, Bastien Loubet wrote:
I update the post to say that we tried to make a rerun of the trajectory on
our local machine and the output of the pullx.xvg file (created with the
option -px of mdrun) is:
# This file was created Wed Ju
On 6/6/13 4:45 AM, Ishwor Poudyal wrote:
Dear all
I want to study the diffusion coeffcient of CO in water. I have done the
energy minimization step and got the problem segmentation fault during
Equilibration. I am confused whether my input file has
got some error or the err
Hi again!
At the moment, the only way I know how to access .edr files is through the
use of g_energy. However g_energy only outputs .xvg files which is fine for
routine analysis. However if I want to get into further processing, it would
be helpful if I could get the information stored in the .edr
Hi Ankita,
Please provide the commands you've run and the screen output from g_covar.
Cheers,
Tsjerk
On Thu, Jun 6, 2013 at 3:44 PM, Ankita naithani wrote:
> Hi,
>
> I wanted to know about the eigenvectors and eigenvalues. I recently
> performed the principal component analysis (only the bac
Hi,
I wanted to know about the eigenvectors and eigenvalues. I recently
performed the principal component analysis (only the backbone into
consideration) on a trajectory of 2000 residues. I obtained 15641
eigenvectors and 17928 eigenvalues. There is a difference in the number,
which I am not quite
Hello,
I am getting "No default Ryckaert-Bell. types" error for grompp.
I have define all this parameter in .itp file
Here is .itp file
; For parameters see J. Phys. Chem. A. 2002, 106, 1074-1080
; Derived from parsing of runfiles/alat.top.orig
;[ defaults ]
; nbfunccomb-rule gen
1)I use steepest to minimize energy, .mdp as follows,
title = bovin
cpp = /usr/bin/cpp ; the c pre-processor
define = -DFLEXIBLE
constraints = all-bonds
integrator = steep
dt = 0.002; ps !
nsteps
Hi everybody!
This is a sort-of general question that I am not sure where to find the
answer for. I am running a simulation on the order of tens of microseconds.
However I also want to do some analysis on the order of very small time
steps but I do not want to save the data of very small time step
Thanks a lot Tsjerk :)
-Anirban
On Thu, Jun 6, 2013 at 4:42 PM, Tsjerk Wassenaar wrote:
> Hi Anirban,
>
> Indeed.
>
> :)
>
> Tsjerk
>
>
> On Thu, Jun 6, 2013 at 1:11 PM, Anirban >wrote:
>
> > Dear Tsjerk,
> >
> > Thank you very much for the explanation.
> >
> > So, in other words, as I have ca
Hi Anirban,
Indeed.
:)
Tsjerk
On Thu, Jun 6, 2013 at 1:11 PM, Anirban wrote:
> Dear Tsjerk,
>
> Thank you very much for the explanation.
>
> So, in other words, as I have carried out PCA on the basis of CA atoms from
> the MD trajectory, so if I wish to project the crystal structure onto the
Dear Tsjerk,
Thank you very much for the explanation.
So, in other words, as I have carried out PCA on the basis of CA atoms from
the MD trajectory, so if I wish to project the crystal structure onto the
EV, then I need to consider only the CA atoms of the crystal structure
(which in that case wo
Hi Anirban,
The eigenvectors obtained from the simulation are a way of rewriting the
coordinates of your structures, not in terms of atoms-XYZ, but as
combinations of these. Because they are combinations of atom-positions,
they are defined for the selection of atoms used for the calculation. If
yo
Hi Justin,
Thank you so much for the clarification.
Kind regards,
Ankita
On Wed, Jun 5, 2013 at 11:28 PM, Justin Lemkul wrote:
>
>
> On 6/5/13 3:03 PM, Ankita naithani wrote:
>
>> Hi,
>>
>> I have two questions.
>>
>> I have performed a simulation on my protein structure and after the
>> si
Hi ALL,
I have carried out a simulation of a protein and have carried out PCA on
the entire trajectory. I have obtained a 2D projection plot of EV1 on EV2.
Now I want to locate the conformation of the crystal structure (with which
I started the MD) on this map. How to do this? Can I use "g_anaeig
I update the post to say that we tried to make a rerun of the trajectory on
our local machine and the output of the pullx.xvg file (created with the
option -px of mdrun) is:
# This file was created Wed Jun 5 12:15:49 2013
# by the following command
Dear all
I want to study the diffusion coeffcient of CO in water. I have done the
energy minimization step and got the problem segmentation fault during
Equilibration. I am confused whether my input file has
got some error or the error is in the processing machine.I have made
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