From chemistry-request@ccl.net Fri Jan 16 10:00:46 2004
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Date: Fri, 16 Jan 2004 10:01:42 -0500
From: "Q.Z." <qzou.-at-.iupui.edu>
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Subject: CCL: calculate relative hydrophobicity
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Hi All,
 I wonder anyone knows a free program to calculate the relative 
hydrophobicity of a ligand binding pocket in proteins.
Thanks.

Q.Z.


From chemistry-request@ccl.net Fri Jan 16 11:32:43 2004
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From: "Stefan Bromley" <S.T.Bromley[at]tnw.tudelft.nl>
Organization: Delft University of Technology (TNW-DCT)
To: chemistry[at]ccl.net
Date: Fri, 16 Jan 2004 17:33:23 +0100
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Subject: CCL: Crystal prediction software
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Dear CCL,

does anyone know where one can download a version of MOLPAK, 
DMAREL or any similar codes useful for molecular crystal structure 
prediction?

Many thanks,

Stefan Bromley   
________________________________________________________

Dr Stefan T. Bromley
Laboratory of Applied Organic Chemistry and Catalysis
DelftChemTech, Delft University of Technology
Julianalaan 136, 2628 BL Delft
The Netherlands

Phone  : + 31 1527 89418
 
e-mail  : S.T.Bromley[at]tnw.tudelft.nl
________________________________________________________




From chemistry-request@ccl.net Fri Jan 16 10:17:44 2004
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Date: Fri, 16 Jan 2004 16:20:57 +0100
From: Gabriele Cruciani <gabri~at~chemiome.chm.unipg.it>
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Subject: calculate relative hydrophobicity
References: <4007FCD6.2040101~at~iupui.edu>
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Hi
you can easily do it using the hydrophobic probe in GRID force field 
(free from www.moldiscovery.com).
For precise numerical quantification of the regions, VolSurf can be 
used, from the same site.

Enjoy
Gabriele Cruciani



From chemistry-request@ccl.net Fri Jan 16 10:51:46 2004
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Date: Fri, 16 Jan 2004 16:52:17 +0100 (MET)
From: "Bimo Ario Tejo" <bimo7~at~gmx.de>
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Subject: residue cross correlation
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Dear all,

I'm just wondering does anyone have a program to calculate residue
cross-correlation (DCCM) of MD trajectories based on vectors (origin at mean atom
position during simulation)? I need such a program that able to read any
trajectories regardless what program used (CHARMM, Amber, Gromacs, etc.)...

Thank you and best regards,
Bimo

-- 
+++ GMX - die erste Adresse f|r Mail, Message, More +++
Bis 31.1.: TopMail + Digicam f|r nur 29 EUR http://www.gmx.net/topmail



From chemistry-request@ccl.net Thu Jan 15 22:42:41 2004
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To: chemistry|at|ccl.net
Subject: CHELPG in GAMESS
Message-ID: <1074224606.40075dded24e9|at|webmail.u-picardie.fr>
Date: Fri, 16 Jan 2004 04:43:26 +0100 (CET)
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Dear All,

I am trying to use CHELPG in GAMESS to get electrostatic potential. In the
GAMESS doc., it is written:
"CHELPG: to use a modified version of the CHELPG algorithm, which produces a
symmetric grid of points for a symmetric molecule"

- Does it mean that the CHELPG algorithm in GAMESS is different from the
published one in Breneman & Wiberg, J Comput Chem 1990, 11, 361-373 ? 
- If yes, why this algo. has been modified in GAMESS and/or is there a way to use
the original one in GAMESS ?

Thanks, regards, Francois


From chemistry-request@ccl.net Fri Jan 16 13:45:11 2004
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From: "Curt M. Breneman" <brenec~at~rpi.edu>
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Subject: Re: CCL:CHELPG in GAMESS
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Dear Francois,

I'm not familiar with the specific CHELPG modifications made for GAMESS, but one
issue with the original CHELPG routine was the possibility of computing atomic
charges that do not coincide with molecular symmetry.  In the original
implementation, no special attention was paid to assuring that the 3D  grid of
sampled points was symmetrically distributed with respect to molecular symmetry
elements.  The effect can result in unequal ESP charges being computed for
symmetrically-related atoms.   This is not always a problem - In fact, it was found
that for small molecules using dense grids, (0.2 au or so), this was a minor effect.
In practical applications, this can raise an issue. The variation can be large or
small, depending upon the complexity of the electrostatic field and the sparsity of
the sampling grid.

Cheers,

Curt Breneman
RPI Chemistry


FyD wrote:

> Dear All,
>
> I am trying to use CHELPG in GAMESS to get electrostatic potential. In the
> GAMESS doc., it is written:
> "CHELPG: to use a modified version of the CHELPG algorithm, which produces a
> symmetric grid of points for a symmetric molecule"
>
> - Does it mean that the CHELPG algorithm in GAMESS is different from the
> published one in Breneman & Wiberg, J Comput Chem 1990, 11, 361-373 ?
> - If yes, why this algo. has been modified in GAMESS and/or is there a way to use
> the original one in GAMESS ?
>
> Thanks, regards, Francois
>
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