Re: [gmx-users] editconf -translate help

2007-06-24 Thread David van der Spoel

Shayla Fitzsimmons wrote:

I have a box which contains a slab of carbon (solid) that is centered within the
box.  However, I want the slab to be at the very right side of the box - I know
I must use editconf -translate to do this, however I cannot seem to make it
work.

The slab is centered has the same height and width (y and z coordinates) of the
box, however it is one third of the length (the x coordinate).  Graphically, at
the moment, it looks like this:
 _
|   xxx   |
|   xxx   |
|___xxx___|

Where 'xx' is my slab (that is how the view comes up when I open the file in
rasmol).

The dimensions of the box (as listed in the .gro file) are 13.90030 4.02160
5.36640

As I previously said, I want the slab to be on the right side of the box, not
the center, however I have tried several different things and it does not seem
to want to work for me (however, I am unsure if I am using the proper values
for -translate).

What X Y Z coordinates should I use for this to translate it?



the difference between new and old com. most likely 5 0 0 will do the trick.


Thanks!
S F
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--
David.

David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  75124 Uppsala, Sweden
phone:  46 18 471 4205  fax: 46 18 511 755
[EMAIL PROTECTED]   [EMAIL PROTECTED]   http://folding.bmc.uu.se

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[gmx-users] superimpose pdbs

2007-06-24 Thread Alan

Hi!
It may be a bit GMX off-topic: I am looking for a command line superimpose
application that would be able to get all individual pdb files in folder and
generated new pdb versions of them 3D superimposed.

Something like what SuperPose (
http://wishart.biology.ualberta.ca/SuperPose/help.html) does, but then
locally in my computer.

Many thanks in advance.

Cheers,
Alan

--
Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate
Department of Biochemistry, University of Cambridge.
80 Tennis Court Road, Cambridge CB2 1GA, UK.

http://www.bio.cam.ac.uk/~awd28
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Re: [gmx-users] superimpose pdbs

2007-06-24 Thread David van der Spoel

Alan wrote:

Hi!

It may be a bit GMX off-topic: I am looking for a command line 
superimpose application that would be able to get all individual pdb 
files in folder and generated new pdb versions of them 3D superimposed.



g_confrms

Something like what SuperPose 
(http://wishart.biology.ualberta.ca/SuperPose/help.html) does, but then 
locally in my computer.


Many thanks in advance.

Cheers,
Alan

--
Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate
Department of Biochemistry, University of Cambridge.
80 Tennis Court Road, Cambridge CB2 1GA, UK.
 http://www.bio.cam.ac.uk/~awd28




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--
David.

David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  75124 Uppsala, Sweden
phone:  46 18 471 4205  fax: 46 18 511 755
[EMAIL PROTECTED]   [EMAIL PROTECTED]   http://folding.bmc.uu.se

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[gmx-users] Regarding minimization of POPE:POPG lipid bilayer

2007-06-24 Thread chris . neale

  I built a POPE:POPG bilayer in 3:1 ratio.


Simplify. Start with pure POPE and pure POPG first.


When I am minimizing the  bilayer, bonds in head groups are breaking
in POPE and POPG lipid  molecules.


Your topologies are incorrect. Start with a simple test system: a
single POPE in vaccuum.

while creating *.tpr file using the above file for minimization, I  
am getting fallowing message.


  calling /lib/cpp...
  In file included from pg-pe.top:5:
  dpopg.itp:10:8: warning: multi-line string literals are deprecated


Why not take a look at line 10 (or line 8) in dpopg.itp?


You are still a long way from simulating a protein in the bilayer. May
I recommend that you try a little harder to solve your problems before
posting (e.g. by reading the warning messages carefully and seeing
what they mean for yourself, or by trying to find a simpler test
system to narrow down the problem). In this way you will avoid  
decreasing your likelihood of receiving answers to the harder problems  
you may encounter.



Good luck.

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RE: [gmx-users] Energy minimization problem with Double precision and mpi

2007-06-24 Thread Josiah Zayner


 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
 On Behalf Of David van der Spoel
 Sent: Sunday, June 24, 2007 4:18 AM
 To: Discussion list for GROMACS users
 Subject: Re: [gmx-users] Energy minimization problem with Double precision
 andmpi
 
 Josiah Zayner wrote:
  -Original Message-
  From: [EMAIL PROTECTED] [mailto:gmx-users-
 [EMAIL PROTECTED]
  On Behalf Of David van der Spoel
  Sent: Saturday, June 23, 2007 4:36 PM
  To: Discussion list for GROMACS users
  Subject: Re: [gmx-users] Energy minimization problem with Double
 precision
  andmpi
 
  Josiah Zayner wrote:
  I managed to install mdrun_d from CVS and the problem is fixed
 
 
  you didn't say which cvs solved your problem. was it the
  release_3_3_patches branch?
 
  Mdrun_d says version: 3.3.99_development_20070413
  It was the main branch.
 
 OK,
 
 this branch is not yet quite stable, we are still testing things there.
 It would be good to know whether the  release_3_3_patches branch also
 solves your problem.

Installing the release-3-3-patches branch also solves the problem. I only
tested it on two nodes ie. -np 2 but I assume it would also work for more.

 
 --
 David.
 
 David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
 Dept. of Cell and Molecular Biology, Uppsala University.
 Husargatan 3, Box 596,75124 Uppsala, Sweden
 phone:46 18 471 4205  fax: 46 18 511 755
 [EMAIL PROTECTED] [EMAIL PROTECTED]   http://folding.bmc.uu.se
 
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Re: [gmx-users] Energy minimization problem with Double precision and mpi

2007-06-24 Thread David van der Spoel

Josiah Zayner wrote:



-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of David van der Spoel
Sent: Sunday, June 24, 2007 4:18 AM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Energy minimization problem with Double precision
andmpi

Josiah Zayner wrote:

-Original Message-
From: [EMAIL PROTECTED] [mailto:gmx-users-

[EMAIL PROTECTED]

On Behalf Of David van der Spoel
Sent: Saturday, June 23, 2007 4:36 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Energy minimization problem with Double

precision

andmpi

Josiah Zayner wrote:

I managed to install mdrun_d from CVS and the problem is fixed



you didn't say which cvs solved your problem. was it the
release_3_3_patches branch?

Mdrun_d says version: 3.3.99_development_20070413
It was the main branch.


OK,

this branch is not yet quite stable, we are still testing things there.
It would be good to know whether the  release_3_3_patches branch also
solves your problem.


Installing the release-3-3-patches branch also solves the problem. I only
tested it on two nodes ie. -np 2 but I assume it would also work for more.


Thanks, that is good to hear. It could be due to parallel minimization, 
but if it is fixed in CVS I won't investigate it further.


--
David.

David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  75124 Uppsala, Sweden
phone:  46 18 471 4205  fax: 46 18 511 755
[EMAIL PROTECTED]   [EMAIL PROTECTED]   http://folding.bmc.uu.se

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