From chemistry-request@ccl.net Wed Jan 14 10:43:48 2004
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Date: Wed, 14 Jan 2004 16:40:43 +0100
From: Olivier <olivier(at)klingon.uab.es>
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Subject: tinker and Xtalmin
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Hello,
I would like to compute the structure of a monolayer of organic 
molecules using the xtalmin program of the
Tinker package.  
Does anybody ever experienced this kind of calculation with Tinker ?
Thanks
Olivier





From chemistry-request@ccl.net Wed Jan 14 07:55:57 2004
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Message-ID: <40043528.5070700(at)chem.vu.nl>
Date: Tue, 13 Jan 2004 19:12:56 +0100
From: Anton Feenstra <feenstra(at)chem.vu.nl>
Organization: Vrije Universiteit Amsterdam - Pharmaceutical Chemistry
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To: sa.cosco(at)virgilio.it
CC: chemistry(at)ccl.net
Subject: Re: CCL:MD after Autodock
References: <4002B18800001981(at)ims1b.cp.tin.it>
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sa.cosco(at)virgilio.it wrote:

> Dear CCL
> I performed a partial flexible docking analysis of some ligands, using Autodock,
> on a receptor modelled by means of homology building .The complexes obtained
> were geometrically optimized and energetically minimized. Is it really necessary
> to perform a MD simulation after the docking and the minimization? Any suggestion
> will be appreciated

 From doing the MD simulations you can learn several things:
- flexibility in a certain binding mode, i.e. how much can the ligand move
- stability of the protein in presence of the ligand, which can be especially
   interesting in case of a homology model
- a 'second opinion' on the binding mode found by AutoDock by another program,
   i.c. the MD package and associated forcefield.

Having said that, no, it is not really necessary... But I'd strongly advise for it ;-)


-- 
Groetjes,

Anton
  _____________ _______________________________________________________
|             |                                                       |
|  _   _  ___,| K. Anton Feenstra                                     |
| / \ / \'| | | Dept. of Pharmacochem. - Vrije Universiteit Amsterdam |
|(   |   )| | | De Boelelaan 1083 - 1081 HV Amsterdam - Netherlands   |
| \_/ \_/ | | | Tel: +31 20 44 47608 - Fax: +31 20 44 47610           |
|             | Feenstra(at)chem.vu.nl - www.chem.vu.nl/~feenstra/       |
|             | "If You See Me Getting High, Knock Me Down"           |
|             | (Red Hot Chili Peppers)                               |
|_____________|_______________________________________________________|




From chemistry-request@ccl.net Wed Jan 14 08:19:59 2004
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From: Tal Lavy <tallavy-.at.-md.huji.ac.il>
Subject: Search for small molecules
Date: Wed, 14 Jan 2004 15:06:51 +0200
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Dear CCL'ers

I'm interested in small molecules (not peptides) which are flexible (with 6 or 
more rotatable bonds) and are known to have a dominant conformation in gas or
liquid phase.

If anyone knows of or has worked with this kind of molecules, I'll be happy
to know about it,

Thank you in advance,
Tal

===========================================================
Tal Lavy,
Molecular Modeling and Drug Design
Department of Medicinal Chemistry and Natural Products
School of Pharmacy
Hebrew University of Jerusalem
ISRAEL
Phone: 972-2-6757026
Fax: 972-2-6758925
e-mail: tallavy-.at.-md.huji.ac.il

http://www.md.huji.ac.il/models
============================================================




From chemistry-request@ccl.net Wed Jan 14 07:15:11 2004
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Subject: CCL: Sheffield Chemoinformatics Conf. April 2004
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Registration for the 3rd Joint Sheffield Conference on Chemoinformatics
is now open. If you wish to attend, please visit the web site and fill
out your details as directed (cisrg.shef.ac.uk/shef2004). Please note that
registration includes accommodation at Tapton Hall and meals as specified
in the Programme.

The Programme of oral presentations and abstracts are also now available
at the website. 

Bursaries are available for graduate students who will present a poster
at the conference. The bursaries are being awarded by the Chemical
Computing Group, the Molecular Graphics and Modelling Society and the
Chemical Structure Association Trust and will include conference
registration, accommodation and a contribution towards travel expenses.
Applications, as detailed on the web site, should be emailed to Val Gillet
(v.gillet[at]sheffield.ac.uk) by February 20th.

---------------------------------------------------------------
Val Gillet
Dept. Information Studies, University of Sheffield, 
Regent Court, 211 Portobello Street, Sheffield S1 4DP.
Phone: +44 (0) 114 2222 652	Fax: +44 (0) 114 2780 300
---------------------------------------------------------------





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From: "Vladimir Khavryutchenko" <vkhavr$at$compchem.kiev.ua>
To: <CHEMISTRY$at$ccl.net>
Subject: CCL: d-orbitals and transition metals in semiempirical methods
Date: Thu, 15 Jan 2004 00:04:40 +0200
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This is a multi-part message in MIME format.

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Dear CCL'ers

I am interested in d-orbitals and transition metals in the modern =
semiempirical quantum chemical methods and their realizations. If anyone =
knows of the good articles, reviews and so on, please, inform me and, if =
it is possible, send me a copy or file. We have some difficulty with =
scientific journals and books last 15 years.
If anyone knows of the method, introduced into MOPAC6/7 for the =
transition metals? There is not parameterization for these elements, but =
the parameter set is available from HyperChemT 7 from Hypercube, Inc. =
The parameter's files are not marked as copyrighted. Evaluation copy of =
HyperChemT 7 can compute some transition metal compounds, but there are =
not any references about used method, due to Stewart's PM3 method was =
designed for sp-basis only. Up to me, it means that all results, =
obtained using HyperChemT 7 for transition metal compounds can not be =
discussed due to unpublished and undescribed method was applied.=20

If anyone knows of the sites or other open sources for the SINDO and =
MSINDO method, please, inform me too. It is a pity, that new method =
developing is only for the commercial software. LINUX history is a good =
example for the collective developing of the complicated software.
I'll be happy to know more about this and, if these problems are =
interesting, I'll post the replies. I am ready to discuss these problems =
directly.



Thank you in advance,
Vladimir=20


VladimirKhavryutchenko=20
PhD in chemistry
Computation Chemistry Group
Institute for Sorbtion and Problem of Endoecology
National Academy of Science of Ukraine, Kiyv
UKRAINE
Phone: +38(044)563-42-74
e-mail: vkhavr$at$compchem.kiev.ua

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<HTML><HEAD>
<META content=3D"text/html; charset=3Dkoi8-r" http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.3103.1000" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Dear CCL'ers</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3D"Arial CYR" size=3D2>I am interested in d-orbitals and =
transition=20
metals in the modern semiempirical quantum chemical methods and their=20
realizations. If anyone knows of the good articles, reviews and so on, =
please,=20
inform me and, if it is possible, send me a copy or file. We have some=20
difficulty with scientific journals and books last 15 years.<BR>If =
anyone knows=20
of the method, introduced into MOPAC6/7 for the transition metals? There =
is not=20
parameterization for these elements, but the parameter set is available =
from=20
HyperChem&#8482; 7 from Hypercube, Inc. The parameter&#8217;s files are =
not marked as=20
copyrighted. Evaluation copy of HyperChem&#8482; 7 can compute some =
transition metal=20
compounds, but there are not any references about used method, due to =
Stewart&#8217;s=20
PM3 method was designed for sp-basis only. Up to me, it means that all =
results,=20
obtained using HyperChem&#8482; 7 for transition metal compounds can not =
be discussed=20
due to unpublished and undescribed method was applied. </FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3D"Arial CYR" size=3D2>If anyone knows of the sites or =
other open=20
sources for the SINDO and MSINDO method, please, inform me too. It is a =
pity,=20
that new method developing is only for the commercial software. LINUX =
history is=20
a good example for the collective developing of the complicated=20
software.<BR>I'll be happy to know more about this and, if these =
problems are=20
interesting, I&#8217;ll post the replies. I am ready to discuss these =
problems=20
directly.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3D"Arial CYR" size=3D2></FONT>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3D"Arial CYR" size=3D2>Thank you in advance,<BR>Vladimir =

</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3D"Arial CYR" size=3D2><BR>VladimirKhavryutchenko =
<BR>PhD in=20
chemistry<BR>Computation Chemistry Group<BR>Institute for Sorbtion and =
Problem=20
of Endoecology<BR>National Academy of Science of Ukraine,=20
Kiyv<BR>UKRAINE<BR>Phone: +38(044)563-42-74<BR>e-mail: <A=20
href=3D"mailto:vkhavr$at$compchem.kiev.ua">vkhavr$at$compchem.kiev.ua</A></FONT=
></DIV></BODY></HTML>

------=_NextPart_000_0007_01C3DAFB.2C3875D0--




From chemistry-request@ccl.net Wed Jan 14 16:57:28 2004
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Subject: increasing optimization cycles in Mopac
From: Rajarshi Guha <rxg218!at!psu.edu>
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To: chemistry!at!ccl.net
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Hi,
  I'm trying to do a geometry optimization with Mopac 7.04. The keywords
I have specified are

pm3 t=999999.9  ef hess=1 mmok let gnorm=

However the cacluation does not end properly and I get the error:

EXCESS NUMBER OF OPTIMIZATION CYCLES

Looking through the Mopac manual I dont see anyway to increase the
number of optimization cycles. Does anybody know how can I increase the
number of cycles so that I can achieve the SCF field?

Thanks,

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Accuracy, n.:
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