From chemistry-request@server.ccl.net Mon May 12 08:00:37 2003
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Date: Mon, 12 May 2003 20:02:00 +0800 (HKT)
From: Wong Lai Ho <h9807907@hkusua.hku.hk>
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Subject: Error estimation of gibbs free energy
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Dear CCLers,

I have a question regarding error estimation of the experimental values of
gibbs free energy.
As we knows that:
delta G(formation)
   = delta H(formation) 
   - Temp * [entropy(molecule)-sum(entropy(atoms to form the molecules))]

Can I claim that the experimental error bar of the gibbs free energy(delta
G) is equal to the error bar of the enthalpy change of formation(delta H)?
(since the error introduced by the entropy is usually very small)
Is there any papers or books talking about this error?

I would be grateful if you can give some comments on this claim.

Larry


From chemistry-request@server.ccl.net Mon May 12 09:58:10 2003
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Date: Mon, 12 May 2003 16:00:56 +0200
From: Peter Waaben Thulstrup <pwt@kvl.dk>
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To: chemistry@ccl.net
Subject: Database on kinetic data for beta-lactamase - substrate/inhibitor 
 binding ?
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Dear CCL,

I could use some help in getting experimental data for a new modeling
project. Is anyone aware of database resources with kinetic data for
beta-lactamase - inhibitor/substrate binding? A list of references on
the subject would also be very interesting.

Thanks in advance for any help that you can offer,
Peter
-- 
Peter W. Thulstrup
Chemistry Department / Royal Veterinary and Agricultural University
Thorvaldsensvej 40 / DK-1871 Frederiksberg C / Denmark
Phone (Chemistry Dep't): +45 35282400 / Fax: +45 35282398
Phone (Office - direct): +45 35282464 / E-mail: pwt@kvl.dk

From chemistry-request@server.ccl.net Mon May 12 02:10:46 2003
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From: "Dmitry Rozmanov" <dima@xenon.spb.ru>
To: "CCL" <chemistry@ccl.net>
Subject: ab initio with periodic conditions
Date: Mon, 12 May 2003 10:04:25 +0400
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Dear Colleagues.

Could you give me a hit about free software for ab initio computations with
periodic boundary conditions?

I need it for condensed phase modelling, for water solutions to be precise.
As I understand such programs are more sutable for solid phase, but I guess
that modelling water solution as an ice-like structure may be interesting as
well, wont't it?

GAMESS (US) can use effective fragments for cheaper solvent modelling. Is
there any periodic software that is capable of doing such thing?

Thank you in advance.

Regards.

    ---Dmitry.





From chemistry-request@server.ccl.net Mon May 12 09:59:27 2003
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Date: Mon, 12 May 2003 09:59:26 -0400 (EDT)
From: Alfredo Cardenas <alfredo@cs.cornell.edu>
To: chemistry@ccl.net
Subject: Re:Exposed surface area routine
In-Reply-To: <Pine.SOL.3.95.1030509161125.9033A-100000@ringding.cs.cornell.edu>
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I want to thank the people that reply to my inquiry. Their suggestions are
quite helpful. Here are their responses.
 
Alfredo Cardenas
alfredo@cs.cornell.edu

 
*************************************************
Date: Wed, 7 May 2003 15:08:55 -0500 (CDT)
From: Abhishek Jha <ajha@midway.uchicago.edu>
To: Alfredo Cardenas <alfredo@cs.cornell.edu>
Subject: Re: CCL:Exposed surface area routine
 
Try TINKER. It has a subroutine that does it.
 
-Abhishek
 
 
*************************************************
Swiss PDB Viewer / Deep View does this:
 
 
http://us.expasy.org/spdbv/
 

Dr. N. Sukumar
http://www.drugmining.com/
Visiting Scientist
Rensselaer Department of Chemistry and
Wadsworth Center, New York State Dept.of Health
 
************************************************
 
Date: Wed, 7 May 2003 17:05:45 -0400 (EDT)
From: Avijit Ghosh <avijit@physics.drexel.edu>
To: Alfredo Cardenas <alfredo@cs.cornell.edu>
Subject: Re: CCL:Exposed surface area routine
 
On Wed, 7 May 2003, Alfredo Cardenas wrote:
 
 
         Hey Alfredo, I seem to recall GEPOL93 did this reasonably well. 
 
http://server.ccl.net/cca/software/SOURCES/FORTRAN/molecular_surface/gepol93/ind
ex.shtml
***************************************************
Date: Wed, 7 May 2003 17:37:15 -0400 (EDT)
From: Manoj Pal <manojp@umich.edu>
To: Alfredo Cardenas <alfredo@cs.cornell.edu>
Subject: Re: CCL:Exposed surface area routine
 
Hi Alfredo,
 
You can use naccess.f available at http://wolf.bms.umist.ac.uk/naccess/
for your work.
******************************************************
Date: Fri, 9 May 2003 14:20:00 +0200
From: Andrea Carotti <and.carotti@farmchim.uniba.it>
To: Alfredo Cardenas <alfredo@cs.cornell.edu>
Subject: Re: CCL:Exposed surface area routine
 
 
You can try this link: http://molvis.sdsc.edu/protexpl/frntdoor.htm
 
******************************************************
Look to the ASV freeware on the following site:
http://petitjeanmichel.free.fr/itoweb.petitjean.freeware.html#ASV
There are both the analytical calculation and the Monte-Carlo
computation. If you have hundreds of intersecting spheres, the
Monte-Carlo is faster (try, say, N=10^5 ou 10^6)

Michel Petitjean,                     Email: petitjean@itodys.jussieu.fr
ITODYS (CNRS, UMR 7086)                      ptitjean@ccr.jussieu.fr
1 rue Guy de la Brosse                Phone: +33 (0)1 44 27 48 57
75005 Paris, France.                  FAX  : +33 (0)1 44 27 68 14
http://petitjeanmichel.free.fr/itoweb.petitjean.html

 
 
 



From chemistry-request@server.ccl.net Mon May 12 09:58:00 2003
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Date: Mon, 12 May 2003 08:57:37 -0500
From: "Dr. Richard L. Wood" <rlw28@cornell.edu>
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CC: CHEMISTRY@ccl.net
Subject: Re: CCL:Error estimation of gibbs free energy
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Wouldn't the following be true

d(dG) = square root([d(dH)]^2 + [d(dS)]^2)?

dG is delta G, d(dG) is the error in delta G, dH is delta H, d(dH) is the error
in delta H, dS is delta S and d(dS) is the error in delta S.

This is taken from a simple error propagation analysis as taught in some
physical/analytical chemistry laboratories.

Richard

Wong Lai Ho wrote:

> Dear CCLers,
>
> I have a question regarding error estimation of the experimental values of
> gibbs free energy.
> As we knows that:
> delta G(formation)
>    = delta H(formation)
>    - Temp * [entropy(molecule)-sum(entropy(atoms to form the molecules))]
>
> Can I claim that the experimental error bar of the gibbs free energy(delta
> G) is equal to the error bar of the enthalpy change of formation(delta H)?
> (since the error introduced by the entropy is usually very small)
> Is there any papers or books talking about this error?
>
> I would be grateful if you can give some comments on this claim.
>
> Larry
>
> -= This is automatically added to each message by mailing script =-
> CHEMISTRY@ccl.net -- To Everybody  | CHEMISTRY-REQUEST@ccl.net -- To Admins
> Ftp: ftp.ccl.net  |  WWW: http://www.ccl.net/chemistry/   | Jan: jkl@ccl.net

--
Richard L. Wood, Ph. D.
Physical/Computational Chemist
Post-doctoral Associate
Department of Chemistry
Trinity University, San Antonio, TX 78212





From chemistry-request@server.ccl.net Mon May 12 04:26:11 2003
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Date: Mon, 12 May 2003 16:26:08 +0800 (CST)
From: =?gb2312?q?Jinsong=20Zhao?= <zh_jinsong@yahoo.com.cn>
Subject: How to calculate molecular volume
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Dear all,

I hope to know if there is any program or routine
could calculate the molecular volume with high
precision and reliability, moreover, to figure out the
length, width and high of the grid that contain the
molecule. 

Any comments, suggestion are welcome!

Thanks for essential responses!

Best regards,

Jinsong

_________________________________________________________
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From chemistry-request@server.ccl.net Sun May 11 15:29:07 2003
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Subject: Protein folding and simulation problem finally solved ?
From: Jan Torleif Pedersen <jatp@lundbeck.com>
To: chemistry@ccl.net
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Greetings,

Apparently, the protein folding and simulation problem has been solved
by a small Cambridge, UK based company called Cambridge Proteomics
Ltd.(http://www.camprot.com). Is anybody familiar with this new and
revolutionary technology? - I would be quite interested in hearing from
anybody that has more information.

		Many Regards  -- Jan

Dr. Jan T. Pedersen
Section Head, Bioinformatics
H. Lundbeck A/S
Ottiliavej 9
2500 Valby
Denmark
phone: 36 43 28 87
email: jatp@lundbeck.com





From chemistry-request@server.ccl.net Sun May 11 18:41:02 2003
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To: Jan Labanowski <jkl@ccl.net>, chemistry@ccl.net
Subject: Re: CCL:cartesians to z-mat and back
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2003 May 11

I might just add that

As Jan Labanowski implies, writing an algorithm to convert a general set of
molecular Cartesians to a good Z-matrix is a problem in artificial intelligence
(the converse is trivial).
The dying (?) art of writing a Z-matrix is treated nicely and compactly, with
useful caveats, in _A Handbook of Computational Chemistry_, Tim Clark, Wiley, New
York, 1985; pp 102-119.

E. Lewars
======





Jan Labanowski wrote:

> I love MOLDEN and use it often for my geometry conversions. It comes
> with the Z-matrix editor:
>
> http://www.cmbi.kun.nl/~schaft/molden/molden.html
>
> It should be stressed that conversion of cartesians to Z-matrix can only
> be a trivial task for molecules that are trees (i.e., do not contain cycles).
> When rings (or more complicated arrangements, like cages, say, cubane) are
> present, the well behaved Z-matrix should contain dummy atoms. You can try
> to understand the problem by build the Z-matrix in such a way
> that changing one parameter does not affect any other parameters.
>
> For example, the z-matrix for benzene ring has to involve a centroid (a dummy
> atom in the center of the ring) or otherwise, changing one torsion angles
> within the ring will change other torsion angles. With the centroid, and
> the rays going from it to the real atoms, you can build a Z-matrix which
> does not involve dependencies between parameters.
>
> Now... Can the software detect such situations automatically and deal with
> them. Sure... However, quite frankly, I did not see much of such
> packages around. It is not a trivial problem, and even for simple molecules
> with cycles, there are many ways to represent their geometry as a Z-matrix.
> And deciding which Z-matrix is better, is again not a trivial thing. While
> there are obviously objective measures, this is still an art, and the
> beauty of the Z-matrix is in the eye of the beholder. And while there are
> methods which make Z-matrix less important for unconstrained optimization
> of the whole molecule (e.g., redundant internal coordinates in Gaussian),
> there is nothing better than a well behaved Z-matrix when doing partial
> optimizations of chosen geometrical features of the molecule(s), e.g.,
> when studying transition states and reaction paths.
>
> Jan
>
> Jan K. Labanowski         |  phone: 614-292-9279,  FAX: 614-292-7168
> Ohio Supercomputer Center |  E-mail: jkl@ccl.net
> 1224 Kinnear Rd,          |  http://www.ccl.net/~jkl
> Columbus, OH 43212-1163   |  http://www.ccl.net/    http://asdn.net/
>
> -= This is automatically added to each message by mailing script =-
> CHEMISTRY@ccl.net -- To Everybody  | CHEMISTRY-REQUEST@ccl.net -- To Admins
> Ftp: ftp.ccl.net  |  WWW: http://www.ccl.net/chemistry/   | Jan: jkl@ccl.net



From chemistry-request@server.ccl.net Mon May 12 16:41:32 2003
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Date: Mon, 12 May 2003 17:41:13 -0300 (ADT)
From: Fuqiang Ban <fban@dal.ca>
To: chemistry@ccl.net
Subject: Compilation NBO 5.0
In-Reply-To: <Pine.A41.3.95.1030505143857.84964B-100000@is.dal.ca>
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Dear CCLers,

I cannot compile the modified l607.F (for unix) of NBO 5.0 successfuly
using the G98 utility libraries by issuing the command "bsd/bldg98
linkrest l607.exe". The problem is that the "GauNBO" subroutine taken from
l607.F.old does not seem to work with the NBO 5.0. Could anybody tell me
what need to be done (besides commenting out the five lines as suggested
by NBO 5.0 manual) for the GauNBO subroutine to be workable with NBO 5.0.

Your help is highly appreciated.

Thanks,
Fuqiang Ban  


From chemistry-request@server.ccl.net Mon May 12 17:26:34 2003
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Dear All,
  I am new to Autodock.  I just finishd running autodock using adt
interface on a known protein-ligand complex. Apparently, I have one
false hit in which the rmsd of the ligand from the crystallograpic
position is way high (14 A) while there is a second rank culster (three
conformations) has rmsd of 0.88A.  The false hit is located on the
protein surface. When I prepared my protein and added Kollman charge,
the net charge was -9. Wonder if that is not reasonable for the sake of
docking? I would like to know anything in general how to correct these
problems. Thanks in advance.

Q.


From chemistry-request@server.ccl.net Mon May 12 20:17:43 2003
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To: Wong Lai Ho <h9807907@hkusua.hku.hk>, CHEMISTRY@ccl.net
Subject: Re: CCL:Error estimation of gibbs free energy
References: <Pine.GSO.4.10.10305121945440.13754-100000@hkusua> <3EBFA850.C68E108E@cornell.edu>
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Opps, it should be

d(dG) = square root([d(dH)]^2 + [T d(dS)]^2)

so the units come out in kcal/mol (or kJ/mol).

Richard

"Dr. Richard L. Wood" wrote:

> Wouldn't the following be true
>
> d(dG) = square root([d(dH)]^2 + [d(dS)]^2)?
>
> dG is delta G, d(dG) is the error in delta G, dH is delta H, d(dH) is the error
> in delta H, dS is delta S and d(dS) is the error in delta S.
>
> This is taken from a simple error propagation analysis as taught in some
> physical/analytical chemistry laboratories.
>
> Richard
>
> Wong Lai Ho wrote:
>
> > Dear CCLers,
> >
> > I have a question regarding error estimation of the experimental values of
> > gibbs free energy.
> > As we knows that:
> > delta G(formation)
> >    = delta H(formation)
> >    - Temp * [entropy(molecule)-sum(entropy(atoms to form the molecules))]
> >
> > Can I claim that the experimental error bar of the gibbs free energy(delta
> > G) is equal to the error bar of the enthalpy change of formation(delta H)?
> > (since the error introduced by the entropy is usually very small)
> > Is there any papers or books talking about this error?
> >
> > I would be grateful if you can give some comments on this claim.
> >
> > Larry
> >
>
> --
> Richard L. Wood, Ph. D.
> Physical/Computational Chemist
> Post-doctoral Associate
> Department of Chemistry
> Trinity University, San Antonio, TX 78212
>
> -= This is automatically added to each message by mailing script =-
> CHEMISTRY@ccl.net -- To Everybody  | CHEMISTRY-REQUEST@ccl.net -- To Admins
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--
Richard L. Wood, Ph. D.
Physical/Computational Chemist
Post-doctoral Associate
Department of Chemistry
Trinity University, San Antonio, TX 78212





From chemistry-request@server.ccl.net Mon May 12 13:26:30 2003
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Subject: Re: CCL:Protein folding and simulation problem finally solved ?
From: David <spoel@xray.bmc.uu.se>
To: Jan Torleif Pedersen <jatp@lundbeck.com>
Cc: chemistry@ccl.net
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Date: 12 May 2003 21:27:02 +0200

On Sun, 2003-05-11 at 22:27, Jan Torleif Pedersen wrote:
> Greetings,
> 
> Apparently, the protein folding and simulation problem has been solved
> by a small Cambridge, UK based company called Cambridge Proteomics
> Ltd.(http://www.camprot.com). Is anybody familiar with this new and
> revolutionary technology? - I would be quite interested in hearing from
> anybody that has more information.

I suggest you contact them directly. There is no information on their
website, and I haven't seen any publications from them. Until it is
published and proven for many different proteins, it is just
advertising. 

-- 
Groeten, David.
________________________________________________________________________
Dr. David van der Spoel, 	Dept. of Cell and Molecular Biology
Husargatan 3, Box 596,  	75124 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel@xray.bmc.uu.se	spoel@gromacs.org   http://xray.bmc.uu.se/~spoel
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


From chemistry-request@server.ccl.net Mon May 12 14:52:23 2003
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Message-ID: <00be01c318b3$2591f180$0203a8c0@goblin>
From: "Dmitry Rozmanov" <dima@xenon.spb.ru>
To: "CCL" <chemistry@ccl.net>
References: <008c01c3184c$56f56610$0203a8c0@goblin> <004701c318a7$c6e83e60$3e505882@pirx>
Subject: Re: CCL:ab initio with periodic conditions
Date: Mon, 12 May 2003 22:20:20 +0400
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Thank you for the suggestion. Actually I know about CPMD, but still have not
tried it. I have no access to unix computer, only to windows ones. And could
not compile CPMD under windows.

Though, I ran into AbInit code. Have you know anything about it? Is it
better or worse than CPMD? Is it the same thing as CPMD?

Regards.

    ---Dmitry.

----- Original Message -----
From: "Matthias Mohr" <Matthias.Mohr@man.ac.uk>
To: "Dmitry Rozmanov" <dima@xenon.spb.ru>
Sent: Monday, May 12, 2003 8:58 PM
Subject: Re: CCL:ab initio with periodic conditions


> Hi,
>
> I think the best choice for liquid water is the CPMD code of Parrinellos
> group (www.cpmd.org)
> Can be used for ab initio dynamics, but for stationary points as well.
> It does quite well for several "liquid-water-problems". See
> Laasonen, K.; Sprik, M.; Parrinello, M.; Car. R. J. Chem. Phys. 1993, 99,
> 9080.
>
> Tuckerman, M.; Laasonen, K.; Sprik, M.; Parrinello, M. J. Chem. Phys.
1995,
> 103, 150
>
>
> Regards, Matthias
>
>
>
> ----
> Dr Matthias Mohr
> Dept. of Chemistry
> University of Manchester
> Oxford Road
> M13 9PL Manchester, UK
> Matthias.Mohr@man.ac.uk
> http://www.ch.man.ac.uk/theory/mohr
>
>




