Re: [gmx-users] Unstable system [was: (no subject)]

2014-10-15 Thread Justin Lemkul


Please remember to use a sensible subject line.

On 10/15/14 6:53 AM, Padmani Sandhu wrote:

Hello

I have energy minimized the complex successfully and I dont understand
whats wrong with the system.




What were Epot and Fmax from minimization?  Please copy and paste the actual 
output.  What force field are you using?  What is the source of your ligand 
parameters?


-Justin

--
==

Justin A. Lemkul, Ph.D.
Ruth L. Kirschstein NRSA Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 629
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalem...@outerbanks.umaryland.edu | (410) 706-7441
http://mackerell.umaryland.edu/~jalemkul

==
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Re: [gmx-users] Unstable system [was: (no subject)]

2014-10-15 Thread Padmani Sandhu
Hello Justin,



Epot = -3.4264112e+07
Fmax= 8.5767386e+02
from energy minimization.

I am using force field Gromos43a1 and ligand parameters were derived from
PRODRG.
I have also minimized same protein-ligand complex in the water ealier.


Regards,

Padmani

On Wed, Oct 15, 2014 at 5:05 PM, Justin Lemkul jalem...@vt.edu wrote:

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 Please remember to use a sensible subject line.

 On 10/15/14 6:53 AM, Padmani Sandhu wrote:

 Hello

 I have energy minimized the complex successfully and I dont understand
 whats wrong with the system.



 What were Epot and Fmax from minimization?  Please copy and paste the
 actual output.  What force field are you using?  What is the source of your
 ligand parameters?

 -Justin

 --
 ==

 Justin A. Lemkul, Ph.D.
 Ruth L. Kirschstein NRSA Postdoctoral Fellow

 Department of Pharmaceutical Sciences
 School of Pharmacy
 Health Sciences Facility II, Room 629
 University of Maryland, Baltimore
 20 Penn St.
 Baltimore, MD 21201

 jalem...@outerbanks.umaryland.edu | (410) 706-7441
 http://mackerell.umaryland.edu/~jalemkul

 ==
 --
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-- 
*Padmani sandhu*
*Research Scholar,*
*Center for Computational Biology and Bioinformatics,*
*Central University of Himachal Pradesh,*
*Temporary Academic Block, Shahpur *
*Pin 176206, District Kangra,*
*Himachal Pradesh, India*
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Re: [gmx-users] Unstable system [was: (no subject)]

2014-10-15 Thread Padmani Sandhu
I have also carried out MD simulation for the same comlex in water and that
worked perfectly.

On Thu, Oct 16, 2014 at 1:50 AM, Justin Lemkul jalem...@vt.edu wrote:

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 On 10/15/14 12:35 PM, Padmani Sandhu wrote:

 Hello Justin,



 Epot = -3.4264112e+07
 Fmax= 8.5767386e+02
 from energy minimization.


 Seems reasonable.

  I am using force field Gromos43a1 and ligand parameters were derived from
 PRODRG.


 PRODRG produces topologies full of errors.  Have you done any manual
 adjustments to improve the quality of the topology?

  I have also minimized same protein-ligand complex in the water ealier.


 So minimization works, but does an MD simulation work?  That will help
 sort out whether or not the issue is related to the membrane.

 -Justin

 --
 ==

 Justin A. Lemkul, Ph.D.
 Ruth L. Kirschstein NRSA Postdoctoral Fellow

 Department of Pharmaceutical Sciences
 School of Pharmacy
 Health Sciences Facility II, Room 629
 University of Maryland, Baltimore
 20 Penn St.
 Baltimore, MD 21201

 jalem...@outerbanks.umaryland.edu | (410) 706-7441
 http://mackerell.umaryland.edu/~jalemkul

 ==
 --
 Gromacs Users mailing list

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-- 
*Padmani sandhu*
*Research Scholar,*
*Center for Computational Biology and Bioinformatics,*
*Central University of Himachal Pradesh,*
*Temporary Academic Block, Shahpur *
*Pin 176206, District Kangra,*
*Himachal Pradesh, India*
-- 
Gromacs Users mailing list

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