Re: [gmx-users] genbox using TIP3P?

2007-02-02 Thread Mark Abraham

WILLIAM R WELCH wrote:

Hello
I would like to use the TIP3P model in my calculation, and I would like to be 
able to use genbox to solvate a pepetide, but there is no TIP3P.gro coordinate 
file in the program.  I there such a coordinate file available?


Any 3-point water model will be fine for generating solvent coordinates 
- the standard practice in GROMACS is to solvate with spc216.gro (per 
man genbox) and then in the .top file to #include "tip3p.itp"


Mark
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Re: [gmx-users] fitting procedure in g_rmsf

2007-02-02 Thread Mark Abraham

[EMAIL PROTECTED] wrote:

Hello,

I have a rather basic query.
I want to know which atoms of the reference structure will be used for
fitting , in g_rmsf program.
In the program g_rms there are separate options for fitting and
calcualation of rmsd. I wonder if it is possible for the user to select a
set of atoms for fitting and calculate the rmsf over another range of
atoms or the whole protein, similar as in g_rms program.


Probably. In fact, I'd be amazed if the same functionality were not 
present in g_rmsf as in g_rms, not that I've used the former. Have you 
tried it out to see?


Mark
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Re: [gmx-users] genbox using TIP3P?--Nevermind

2007-02-02 Thread WILLIAM R WELCH

Nevermind, I made one using VMD, it solvated my protien just fine. 

- Original Message -
From: WILLIAM R WELCH <[EMAIL PROTECTED]>
Date: Friday, February 2, 2007 3:25 pm
Subject: [gmx-users] genbox using TIP3P?
To: Discussion list for GROMACS users 


> Hello
>  I would like to use the TIP3P model in my calculation, and I would 
> like to be able to use genbox to solvate a pepetide, but there is no 
> TIP3P.gro coordinate file in the program.  I there such a coordinate 
> file available?
>  Will
>  
>  - Original Message -
>  From: [EMAIL PROTECTED]
>  Date: Friday, February 2, 2007 11:46 am
>  Subject: [gmx-users] fitting procedure in g_rmsf
>  To: gmx-users@gromacs.org
>  
>  
>  > Hello,
>  >  
>  >  I have a rather basic query.
>  >  I want to know which atoms of the reference structure will be used 
> for
>  >  fitting , in g_rmsf program.
>  >  In the program g_rms there are separate options for fitting and
>  >  calcualation of rmsd. I wonder if it is possible for the user to 
>  > select a
>  >  set of atoms for fitting and calculate the rmsf over another range 
> of
>  >  atoms or the whole protein, similar as in g_rms program.
>  >  
>  >  Waiting for your suggessions.
>  >  
>  >  sridhar
>  >  
>  >  ___
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[gmx-users] genbox using TIP3P?

2007-02-02 Thread WILLIAM R WELCH
Hello
I would like to use the TIP3P model in my calculation, and I would like to be 
able to use genbox to solvate a pepetide, but there is no TIP3P.gro coordinate 
file in the program.  I there such a coordinate file available?
Will

- Original Message -
From: [EMAIL PROTECTED]
Date: Friday, February 2, 2007 11:46 am
Subject: [gmx-users] fitting procedure in g_rmsf
To: gmx-users@gromacs.org


> Hello,
>  
>  I have a rather basic query.
>  I want to know which atoms of the reference structure will be used for
>  fitting , in g_rmsf program.
>  In the program g_rms there are separate options for fitting and
>  calcualation of rmsd. I wonder if it is possible for the user to 
> select a
>  set of atoms for fitting and calculate the rmsf over another range of
>  atoms or the whole protein, similar as in g_rms program.
>  
>  Waiting for your suggessions.
>  
>  sridhar
>  
>  ___
>  gmx-users mailing listgmx-users@gromacs.org
>  http://www.gromacs.org/mailman/listinfo/gmx-users
>  Please don't post (un)subscribe requests to the list. Use the
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[gmx-users] fitting procedure in g_rmsf

2007-02-02 Thread sridhar
Hello,

I have a rather basic query.
I want to know which atoms of the reference structure will be used for
fitting , in g_rmsf program.
In the program g_rms there are separate options for fitting and
calcualation of rmsd. I wonder if it is possible for the user to select a
set of atoms for fitting and calculate the rmsf over another range of
atoms or the whole protein, similar as in g_rms program.

Waiting for your suggessions.

sridhar

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Re: [gmx-users] genbox peptide-membrane simulation

2007-02-02 Thread Tsjerk Wassenaar

Maite,

The option -d sets a distance to be met on all sides, considering all
the atoms to in the ouput selection. That's not what you want for a
membrane now, is it? So, you don't want that option. You should have a
box from the lipids anyway, I guess (used to equilibrate that system),
just extend the z-coordinate (third number in the last row of the .gro
file) such that your peptide fits in.

Furthermore, molecules can't go out of the box, there is no outside!
There's only wrapping from one side to the opposite one. Please read
the manual and the mailing list regarding periodic boundary conditions
(and setting up membrane-peptide simulations).

Tsjerk

On 2/2/07, maite lopez <[EMAIL PROTECTED]> wrote:

Hi gromacs users:

I'm simulating a peptide-dppc64 system. When i create my box with
editconf program  (editconf -f input.gro -o output.gro  -bt triclinic
-c -d 1.5) and i solvate, the molecule go out of the box. I used many
kind of box and some  box sizes.
My system size is 4.936 4.408 and 10.503 nm. Should i use -d option
with editconf? I've found in the gmx-users list and in many tutorials,
it should be no less than 0.5.
I don't want to solvate the system in x and y axes due to the
interaction betwen lipids and water. I did it whit editconf -f
input.gro -o output.gro  -bt triclinic  -c  -box 4.936 4.408 12 , but
i didn't use the -d option. Is that ok?

So my question is: Can I do something whit -d and -box option of
editconf program for resulting in a system that it doesn't solvate in
x and y axes, and the molecule isn't out? I need to solvate in z axes.

whould you please help me?
best regard
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--
Tsjerk A. Wassenaar, Ph.D.
Junior UD (post-doc)
Biomolecular NMR, Bijvoet Center
Utrecht University
Padualaan 8
3584 CH Utrecht
The Netherlands
P: +31-30-2539931
F: +31-30-2537623
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Re: [gmx-users] more than 5 digits of the number of atoms and residue

2007-02-02 Thread Erik Lindahl


On Feb 2, 2007, at 8:42 AM, David van der Spoel wrote:


Cherry Y. Yates wrote:

Dear GROMACS users and developers,
In the .gro files, there are only 5 digits reserved for the atom  
number and
residue number. But if I have more than 1 million atoms or  
residues, may I just
increase the column number from 5 to 6? I guess not, then how to  
simulate such

system?

you can use g96 files instead.


...or just restart the numbering of residues or atoms from 1 when you  
hit the column width. This is particularly useful for PDB files, if  
you want to visualize a large system in PyMOL/VMD.


Cheers,

ERik

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