[gmx-users] shake and settle

2010-05-22 Thread subarna thakur
Hi gmx user
I want to use shake algorithm for bonds within protein and settle algorithm for 
the bonds of the water. How do I specify two different constraints algorithm 
in pr.mdp file?
 Subarna Thakur


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Re: [gmx-users] shake and settle

2010-05-22 Thread Mark Abraham
- Original Message -
From: subarna thakur thakur.suba...@yahoo.co.in
Date: Saturday, May 22, 2010 19:23
Subject: [gmx-users] shake and settle
To: gmx-users@gromacs.org


---
| 

 Hi gmx user
 I want to use shake algorithm for bonds within protein and settle algorithm 
 for the bonds of the water. How do I specify two different constraints 
 algorithm in pr.mdp file?
   Subarna Thakur

[ settles ] in your water .itp file chooses settle. You can choose LINCS or 
SHAKE in the .mdp file.

Mark
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[gmx-users] shake vs settle for water

2006-06-07 Thread Rahul Godawat








Hi All,



I am using Groamcs 3.2.1 for my simulations, I am
having some problems with an interfacial system when I use SETTLE as opposed to
SHAKE to constrain OH bonds and HOH angle in water. As a matter of fact I
did various simulations of liquid vapor interface simulations of water, SETTLE
gives me absurd numbers while SHAKE gives consistently good results . I have
looked up the mailing list as well as manual for differences in SHAKE and
SETTLE, but apart from the statement that SETTLE Is better than SHAKE I dint
find much. Any ideas on how to resolve this. 

When I look at OH bond and HOH angle distribution from
SETTLE and SHAKE its precisely same.

Any insights would be helpful,



Thanks

Rahul












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Re: [gmx-users] shake vs settle for water

2006-06-07 Thread David van der Spoel

Rahul Godawat wrote:

Hi All,

 

I am using Groamcs 3.2.1 for my simulations,  I am having some problems 
with an interfacial system when I use SETTLE as opposed to SHAKE to 
constrain OH bonds and HOH angle in water. As a matter of fact  I did 
various simulations of liquid vapor interface simulations of water, 
SETTLE gives me absurd numbers while SHAKE gives consistently good 
results . I have looked up the mailing list as well as manual for 
differences in SHAKE and SETTLE, but apart from the statement that 
SETTLE Is better than SHAKE I dint find much. Any ideas on how to 
resolve this.


When I look at OH bond and HOH angle distribution from SETTLE and SHAKE 
it’s precisely same.

more details please.

time step, cutoffs, PME

OS

why 3.2.1?



Any insights would be helpful,

 


Thanks

Rahul

 

 

 





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--
David.

David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  75124 Uppsala, Sweden
phone:  46 18 471 4205  fax: 46 18 511 755
[EMAIL PROTECTED]   [EMAIL PROTECTED]   http://folding.bmc.uu.se

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