From jerry@dft.chem.cuhk.hk  Tue Feb 27 08:30:59 1996
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From: Jerry C C Chan <jerry@dft.chem.cuhk.hk>
To: chemistry@www.ccl.net
Subject: DFT package for chemical shielding 
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Dear everyone,

	I would like to know what commercial available softwares which can 
be used to calculate the chemical shielding constants of transition metal 
using Density Functional Theory method, in addition to Gaussian94 and 
deMon1p0?  Thanks in advance for your help.

Jerry C.C. Chan
jerry@dft.chem.cuhk.hk  


From robert@europa.chem.uga.edu  Tue Feb 27 10:30:59 1996
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Subject: Re: CCL:Re:  CCL:Dipole-Dipole Interaction in Dynamics
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> Date: 21 Feb 1996 07:18:07 GMT
> From: SUBRAPS@texaco.com
>
>    Is there a Molecular Dynamics Package which incorporates dipole-dipole
> interaction in the electrostatic computation?.
> I would appreciate any input in this regard.
>

Please try Allinger's MM3(94) packages.


Robert

From george@cray.com  Tue Feb 27 11:31:05 1996
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To: chemistry@www.ccl.net
Subject: CCL:G:DFT package for chemical shielding
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Jerry, 

The UniChem package available from Cray can compute NMR chemical shifts
and shielding tensors using DFT. The method is similar to that published by 
Salahub for his 'uncoupled' approximation and uses either IGLO or LORG.  
Results from this method are generally pretty good for C; experience with
other elements is limited.

Sincerely,
George Fitzgerald


=======================================================
George Fitzgerald              
Cray Research, Inc.            george@cray.com
UniChem Manager	
655E Lone Oak Dr.              1-612-683-3676
Eagan, MN 55121		       1-612-683-3099 (fax)
=======================================================

From dkwm2@cus.cam.ac.uk  Tue Feb 27 12:31:04 1996
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From: Daniel Mok <dkwm2@cam.ac.uk>
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To: CHEMISTRY@www.ccl.net
Subject: TCGMSG for SGI Power Challenge?
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Dear Netters,

I've used US GAMESS before. It was parallelized using TCGMSG routines.
The TCGMSG can be compiled after editing the Makefile. However, it has 
porblem when programs start up and try to create child process. Anyone 
has used TCGMSG in SGI Power Challenge beofer? 

Daniel

********************************************************************************
* Daniel K.W. Mok                                                              *
* E-Mail: dkwm2@cam.ac.uk                                Phone: 01223-336423   *
* Office: Dept. of Chemistry, University of Cambridge                          *
*         Lensfield Rd., Cambridge CB2 1EW, UK.                                *
********************************************************************************


From cheidel@weizen.mpibpc.gwdg.de  Tue Feb 27 13:31:15 1996
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Date: Tue, 27 Feb 1996 18:57:05 +0100
From: Christoph Heidelbach <cheidel@weizen.mpibpc.gwdg.de>
To: chemistry@www.ccl.net
Subject: MD parameters from ab initio
Cc: cheidel@gwdg.de


Hallo everybody out there,

I am searching for some information about the evaluation of force field 
parameters for molecular dynamics from ab initio or semiempirical calculations.
What I am looking for is how to fit atomic charges and Lennard-Jones-parameters.
Any answers will be greatly appreciated and I will summerize all replies.

Best regards.

Christoph



___________________________________________________________________________
Dipl.-Chem. Christoph Heidelbach                Max-Planck-Institut 
                                           fuer biophysikalische Chemie
Am Fassberg 11                               
D-37077 Goettingen
Tel.   : (+551) 201 1339
Fax    : (+551) 201 1341
E-Mail.: cheidel@weizen.mpibpc.gwdg.de
         cheidel@gwdg.de
____________________________________________________________________________


From v_uk@iris23.biosym.com  Tue Feb 27 15:31:03 1996
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Date: Tue, 27 Feb 1996 11:50:40 -0800
From: v_uk@biosym.com (Masahiko Katagari XPIRE 4-15-96 HOST John Newsam Tohoku University)
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To: CHEMISTRY@www.ccl.net
Subject: APW



 Dear Collegues,

 Does anybody out there know any free APW program?
 Any information will be appreciated.

 Thanks in advance.

 Masahiko Katagiri

 Masahiko Katagiri, PhD.
 v_uk@biosym.com
 TEL -1-619-546-5389(direct)
 FAX -1-619-458-0136
 e_mail  v_uk@biosym.com

 MSI  9685 Scranton Road  San Diego, CA 92121


From omar@boston.sgi.com  Tue Feb 27 15:42:45 1996
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From: "Omar G. Stradella" <omar@boston.sgi.com>
Message-Id: <9602271459.ZM19453@arkham.boston.sgi.com>
Date: Tue, 27 Feb 1996 14:59:18 -0500
In-Reply-To: Daniel Mok <dkwm2@cam.ac.uk>
        "CCL:TCGMSG for SGI Power Challenge?" (Feb 27,  4:34pm)
References: <Pine.SUN.3.91.960227162901.1343B-100000@apus.cus.cam.ac.uk>
Organization: Silicon Graphics, Inc.
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On Feb 27,  4:34pm, Daniel Mok wrote:
> Subject: CCL:TCGMSG for SGI Power Challenge?
> Dear Netters,
>
> I've used US GAMESS before. It was parallelized using TCGMSG routines.
> The TCGMSG can be compiled after editing the Makefile. However, it has
> porblem when programs start up and try to create child process. Anyone
> has used TCGMSG in SGI Power Challenge beofer?
>
> Daniel

Daniel,

You can get TCGMSG for the R8000 from our anonymous ftp site:

ftp.sgi.com:/pub/tcgmsg.4.04.r8k.tar.Z

Omar.

-- 
+-------------------------------------------------------------------+
 Omar G. Stradella, Ph.D.                     Silicon Graphics, Inc. 
 E-mail: omar@boston.sgi.com                 Computational Chemistry 
 Phone:  +1-(508) 567-2258                http://www.sgi.com/ChemBio 
 FAX:    +1-(508) 562-4755     http://reality.sgi.com/employees/omar 
+------  Ph-nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn  -------+


From nash@chem.wisc.edu  Tue Feb 27 16:31:04 1996
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To: CHEMISTRY@www.ccl.net
From: "John R. Nash" <nash@chem.wisc.edu>
Subject: G: QST2 input


To all Gaussian Gurus:
        I'm trying to run a QST2 job using g94, and the program seems to be
hanging in link 101 (reading the molecular specification).  The log file
stops after the last atom of molecule 2 is read in.  No error message, and
the computer tells me that I'm perpetually in L101. I followed the
instructions in the manual of making my input look like:
%mem=...
%chk=...
#HF/STO-3G OPT=QST2

Title1

0 1
[z-matrix 1]
Variables:
[variables 1]

Title2

0 1
[z-matrix 2]
Variables:
[variables 2]


Interestingly, using the old LST keyword with otherwise identical input
works.  Since the input format for both methods is the same, as described in
the manual, this is curious.  Am I missing something?

-john nash
-==-John R. Nash-==-nash@chem.wisc.edu-==-Dept of Chemistry, UW-Madison-==-


From howardp@syrres.com  Tue Feb 27 17:31:05 1996
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Date: Tue, 27 Feb 96 16:58 EST
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To: chemistry@www.ccl.net
From: Phil Howard <howardp@syrres.com>
Subject: CCL:logP


> From: Jauoad El Bahraoui <jaouad@goliat.ugr.es>
>
> Please tell me about programs does permit the calculation of the
> partition coefficients octanol-water (logP) ?

Our LOGKOW program calculates log Kow using atom-fragments (J Pharm Sci
84:83-92 (1995) with a mean error of 0.31 log units.  It uses smaller
fragments than the CLOGP and therefore, does not have a missing fragment
problem.  An order form for a free demo disk is available on our homepage,
http://esc.syrres.com.

Philip H. Howard                        Phone:	315-426-3350
Environmental Sciences Center           Fax:	315-426-3429
Syracuse Research Corporation           Email:	howardp@syrres.com
Merrill Lane
Syracuse, NY 13210


From vis@gensia.com  Tue Feb 27 18:31:04 1996
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Date: Tue, 27 Feb 1996 14:30:21 +48000
From: Viswanadhan <vis@gensia.com>
To: CHEMISTRY@www.ccl.net
Subject: On the binding of a Rigid Ligand vs. Flexible Analog to a receptor
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Dear Netters:

I have a problem that is fairly typical in pharmaceutical drug design, 
but is not easy to answer. 

We have a fairly rigid cyclic molecule (C) which can exist in two 
conformations (puckers), C1 and C2.
 

Its acyclic analog (A) can also exist in different conformations, but
they are not separated by high barriers. C1 and some conformers of A
appear to have good interactions with a protein, but not C2.

In terms of binding geometry/energies C1 is better than A but A is 
much better than C2. C1 and C2 are separated by a high barrier, but 
they are isoenergetic (internal energy from QM calculations). 

TCP (free energy perturbation) calculations for the  
mutation C1 -> A (or C2 -> A) will not reveal much because of the 
high barrier between C1 and C2 (making interconversion almost impossible in 
a reasonable time). 

Do you think it is possible to qualitatively assess the binding of C vs. A ?

Does it help to calculate the barrier C1 to C2, accurately? (via ab 
initio or MOPAC)? 

I will summarize your responses as well as my thoughts on the problem.

vis

vis@gensia.com



From vis@gensia.com  Tue Feb 27 18:34:29 1996
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Date: Tue, 27 Feb 1996 15:10:03 +48000
From: Viswanadhan <vis@gensia.com>
To: CHEMISTRY@www.ccl.net
Subject: Binding of Flexible vs. Rigid ligands to a receptor
Message-Id: <Pine.SGI.3.90.960227150556.2865A@genny.res.gensia.com>
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Dear Netters:

I have a problem that is fairly typical in pharmaceutical drug design, 
but is not easy to solve. 

We have a fairly rigid cyclic molecule (C) which can exist in two 
conformations (puckers), C1 and C2.
 

Its acyclic analog (A) can also exist in different conformations, but
they are not separated by high barriers. C1 and some conformers of A
appear to have good interactions with a protein, but not C2.

In terms of binding geometry/energies C1 is better than A but A is 
much better than C2. C1 and C2 are separated by a high barrier, but 
they are isoenergetic (internal energy from QM calculations). 

TCP (free energy perturbation) calculations for the  mutation 
C1 -> A (or C2 -> A) will not reveal much because of the high barrier 
between C1 and C2 (making interconversion almost impossible in a 
reasonable time). 

Do you think it is possible to qualitatively assess the binding of C vs. 
A ?

Does it help to calculate the barrier C1 to C2, accurately? (via ab 
initio or MOPAC)? 

I will summarize your responses as well as my thoughts on the problem.

vis

vis@gensia.com



