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From: olivier walker <oliwalk@wam.umd.edu>
Subject: useful software for dual domain protein conformational search?
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Hi all,


I'm currently studying a dual domain protein. I would like to generate all 
possible conformations including some restraints.
Basically, I want to study all possible conformation of the link between 
the two domains (8 residues) and freeze the two domains (not totally 
because I would like to follow the shift of the domains with the 
conformation change of the link).

My questions are:

* what method should I consider (MD, monte carlo, annealing.....)?
* The most important: what is the best suitable software for this kind of 
study ?
* using this software, is it possible to monitor energy, distances between 
given residues and other features?

Thanks in advance for your help

olivier.


**************************************************
Olivier WALKER
Department of Chemistry & Biochemistry
University of Maryland
College Park, MD 20742
USA
**************************************************
Fax : 301-314-0386
Phone : 301-405-8710
E-mail : oliwalk@wam.umd.edu
**************************************************


From chemistry-request@server.ccl.net Fri Sep 27 10:06:55 2002
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Subject: Re: CCL:useful software for dual domain protein conformational
	search?
From: David van der Spoel <spoel@xray.bmc.uu.se>
To: olivier walker <oliwalk@wam.umd.edu>
Cc: chemistry@ccl.net
In-Reply-To: <5.1.1.6.0.20020927090442.00aa4798@imap.wam.umd.edu>
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On Fri, 2002-09-27 at 18:25, olivier walker wrote:
> Hi all,
> 
> 
> I'm currently studying a dual domain protein. I would like to generate all 
> possible conformations including some restraints.
> Basically, I want to study all possible conformation of the link between 
> the two domains (8 residues) and freeze the two domains (not totally 
> because I would like to follow the shift of the domains with the 
> conformation change of the link).
> 
> My questions are:
> 
> * what method should I consider (MD, monte carlo, annealing.....)?
> * The most important: what is the best suitable software for this kind of 
> study ?
you want to use dyndom first to define the hinge and rotation vectors:
http://asgard.sys.uea.ac.uk:8080/dyndom/main.jsp


> * using this software, is it possible to monitor energy, distances between 
> given residues and other features?
Then you can use GROMACS (http://www.gromacs.org, program g_dyndom) to
analyze the results, make interpolations and extrpolations of the
rotatiom motion



-- 
Groeten, David.
________________________________________________________________________
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel@xray.bmc.uu.se	spoel@gromacs.org   http://zorn.bmc.uu.se/~spoel
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

From chemistry-request@server.ccl.net Fri Sep 27 04:11:52 2002
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From: "Leif Laaksonen" <Leif.Laaksonen@csc.fi>
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Subject: Version 2.20 of gOpenMol available
Date: Fri, 27 Sep 2002 11:10:36 +0300
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Compadres,

Scarecrow Computing and CSC, the Finnish IT center for Science,
proudly present the new version of gOpenMol. The flexible
toolbox for the display and analysis of molecular systems.

The new gOpenMol web pages are located at:

http://www.csc.fi/gopenmol/

We currently support gOpenMol on Windows and Linux but hope 
to be able to support the program also on other platforms
in the future.

Yours,

-leif laaksonen
 

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From chemistry-request@server.ccl.net Fri Sep 27 05:48:10 2002
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Date: Fri, 27 Sep 2002 11:48:08 +0200
From: Christoph Steinbeck <steinbeck@ice.mpg.de>
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To: Iain Wallace <wallacei@tcd.ie>
Cc: CCL <chemistry@ccl.net>
Subject: Re: CCL:2D pictures/structure generator
References: <000c01c2656a$f8620f70$626ce286@wallaceiwork>
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Iain Wallace wrote:
> Hi all,
>  
> I have two quick questions if you don't mind:
> 1) Does any one know of a free program that convert molecules in smiles 
> format ( or some other format) into a picture, using a command line for 
> windows. I want to create an excel spreadsheet with a picture of each of 
> my molecules, by using a simple script.
> 2) Does any one know of a free program that can generate molecules based 
> on a given fragment. I have a drug molecule, and a protein, and would 
> like to generate molecules by modifying some of the substituents of the 
> drug molecule and attempt to dock them.
>  
> Thanks for any help you can give me
>  
> Iain
>  

Please try our Chemistry Development Kit (CDK), a free Java toolkit for 
structural chemo- and bioinformatics. It is available from 
http://cdk.sourceforge.net

The CDK provides methods for parsing SMILES and creating coordinates for 
the molecule by structure diagram layout. Output in a common graphics 
format can then be done using the BATIK toolkit.

I guess, that is as close as you can get to solving your problem with 
free software.

Admittedly, there is no command line wrapper for this, but that would be 
just 5 to 10 lines of code.

The CDK also contains some stochastic structure generators but they 
might not be easily adapted to your problem, because they are isomer 
generators, which only produce isomers of a given molecular formula.

Cheers,

Chris

-- 
Dr. Christoph Steinbeck (http://www.ice.mpg.de/departments/ChemInf)
MPI of Chemical Ecology, Winzerlaer Str. 10, Beutenberg Campus, 07745 
Jena, Germany
Tel: +49(0)3641 571263 - Fax: +49(0)3641 571202

What is man but that lofty spirit - that sense of enterprise.
... Kirk, "I, Mudd," stardate 4513.3..



From chemistry-request@server.ccl.net Fri Sep 27 13:03:05 2002
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Hi all,
I am interesting in listing the protein contacts between  molecules,
chains, side-chains etc for whole set of structures, and I wonder if
someone could suggest me a good  UNIX program preferably working on the
command line to to the job. If the program could also identify the type
of contacts (VW, H-bonds, salt bridges) will be great.
Thanks for consideration,



Pedro

*******************************************************************
PEDRO A. RECHE , pHD            TL: 617 632 3824
Dana-Farber Cancer Institute,   FX: 617 632 4569
Harvard Medical School,         EM: reche@research.dfci.harvard.edu
44 Binney Street, D1510A,       EM: reche@mifoundation.org
Boston, MA 02115                URL: http://www.reche.org
*******************************************************************



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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hi all,
<br>I am interesting in listing the protein contacts between&nbsp; molecules,
chains, side-chains etc for whole set of structures, and I wonder if someone
could suggest me a good&nbsp; UNIX program preferably working on the command
line to to the job. If the program could also identify the type of contacts
(VW, H-bonds, salt bridges)&nbsp;will be great.
<br>Thanks for consideration,
<br>&nbsp;
<br>&nbsp;
<p>Pedro
<pre>
*******************************************************************
PEDRO A. RECHE , pHD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TL: 617 632 3824
Dana-Farber Cancer Institute,&nbsp;&nbsp; FX: 617 632 4569
Harvard Medical School,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; EM: reche@research.dfci.harvard.edu
44 Binney Street, D1510A,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; EM: reche@mifoundation.org&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Boston, MA 02115&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; URL: <A HREF="http://www.reche.org">http://www.reche.org</A>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
*******************************************************************</pre>
&nbsp;</html>

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From chemistry-request@server.ccl.net Fri Sep 27 01:17:39 2002
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Date: Fri, 27 Sep 2002 07:16:53 +0200
From: "Dr. Andreas Klamt" <andreas.klamt@cosmologic.de>
Organization: COSMOlogic GmbH&CoKG
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For a charged species the dipole moment is only defined if you specify an almost arbitrary reference point.  Anyway, solvation
energies for charged species mainly depend on the details of the charge distribution and they strongly depend on the shape of
the cavity. Just forget about simple Onsager models. Use PCM or COSMO.

Andreas Klamt

Zhijian Wu schrieb:
> 
> Hi, cclers,
> 
> Does anyone know that for the charged speices (say, +1 and -1), how accurate of the Onsager Model (based on dipole moment) on
> the solvation energy?
> 
> Thank you very much for your help!
> 
> Regards,
> 
> Zhijian Wu
> 
> 
> ------------------------------------------------------------------------------------------------------------------------------
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From chemistry-request@server.ccl.net Fri Sep 27 11:52:52 2002
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Subject: coordinates of a carbon nanotube
To: Chemistry@ccl.net
From: "Ya-Jun Zheng" <YA-JUN.ZHENG@USA.dupont.com>
Date: Fri, 27 Sep 2002 11:52:08 -0400
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Hi,

A friend of mine is interested in examining how a carbon nanotube interacts
with other molecules. There have been some theoretical studies regarding
the structures of some carbon nanotubes and I am wondering whether anyone
would be kind to share the coordinates of a  nanotube model.  Thanks.

Yajun



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From chemistry-request@server.ccl.net Fri Sep 27 10:50:10 2002
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To: olivier walker <oliwalk@wam.umd.edu>
CC: chemistry@ccl.net
Subject: Re: CCL:useful software for dual domain protein conformational search?
References: <5.1.1.6.0.20020927090442.00aa4798@imap.wam.umd.edu>
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This sounds like a good candidate for rigid-body
mechanics. You could treat the two domains as rigid
but NOT fixed in space. You could also apply additional
constraints to the bond lengths if you wanted to increase the
efficiency of the dynamics run. I believe the MBO(N)D program
available from (Accelrys?) can do this sort of thing.
There were a couple papers in J. Comp. Chem. on combining 
quaternion-based mechanics with SHAKE-type constraints
a few years ago:

    Forester TR, Smith W
    SHAKE, rattle, and roll: Efficient constraint algorithms for linked rigid bodies
    J COMPUT CHEM 19 (1): 102-111 JAN 15 1998)

    Wu XW, Sung SS
    Constraint dynamics algorithm for simulation of semiflexible macromolecules
    J COMPUT CHEM 19 (14): 1555-1566 NOV 15 1998 


Richard Gillilan
MacCHESS, Cornell


olivier walker wrote:
> 
> Hi all,
> 
> I'm currently studying a dual domain protein. I would like to generate all
> possible conformations including some restraints.
> Basically, I want to study all possible conformation of the link between
> the two domains (8 residues) and freeze the two domains (not totally
> because I would like to follow the shift of the domains with the
> conformation change of the link).
> 
> My questions are:
> 
> * what method should I consider (MD, monte carlo, annealing.....)?
> * The most important: what is the best suitable software for this kind of
> study ?
> * using this software, is it possible to monitor energy, distances between
> given residues and other features?
> 
> Thanks in advance for your help
> 
> olivier.


From chemistry-request@server.ccl.net Fri Sep 27 04:07:38 2002
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From: Jamie Platts <Platts@Cardiff.ac.uk>
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To: Iain Wallace <wallacei@tcd.ie>
cc: CCL <chemistry@ccl.net>
Subject: Re: CCL:2D pictures/structure generator
In-Reply-To: <000c01c2656a$f8620f70$626ce286@wallaceiwork>
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  Hi Iain - take a look at Daylight's Depict utility:

http://www.daylight.com/daycgi/depict

where you should be able to save the generated structure as a GIF. Hope
that helps,

  Jamie

> 
> I have two quick questions if you don't mind:
> 1) Does any one know of a free program that convert molecules in smiles
> format ( or some other format) into a picture, using a command line for
> windows. I want to create an excel spreadsheet with a picture of each of
> my molecules, by using a simple script. 
> 
> 




From chemistry-request@server.ccl.net Fri Sep 27 16:26:44 2002
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CC: Zhijian Wu <zhijw@hotmail.com>, chemistry@ccl.net
Subject: Re: CCL:solvation energy
References: <F106SCfOGVp8aJ6zILI00007864@hotmail.com> <3D93E9C5.7CC69FA2@cosmologic.de>
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In addition, a molecule with 0.0 dipole moment might not get solvated in a dipole model... charged or not, ... say 1,4 dioxane, or
1,4 diazine..certainly soluble in a lot of solvents...  Also, one can disolve 1gr of benzene per liter of water.


John McKelvey
"Dr. Andreas Klamt" wrote:

> For a charged species the dipole moment is only defined if you specify an almost arbitrary reference point.  Anyway, solvation
> energies for charged species mainly depend on the details of the charge distribution and they strongly depend on the shape of
> the cavity. Just forget about simple Onsager models. Use PCM or COSMO.
>
> Andreas Klamt
>
> Zhijian Wu schrieb:
> >
> > Hi, cclers,
> >
> > Does anyone know that for the charged speices (say, +1 and -1), how accurate of the Onsager Model (based on dipole moment) on
> > the solvation energy?
> >
> > Thank you very much for your help!
> >
> > Regards,
> >
> > Zhijian Wu
> >
> >
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