Re: [AMBER] creating a box of fixed size

From: Lorenzo Gontrani <l.gontrani.caspur.it>
Date: Thu, 26 Apr 2012 15:55:48 +0200

Hi Bala..you could also use the software "Packmol" (free), with an
input file like this:

#
# A mixture of water and protein
#

tolerance 2.0
filetype pdb
output BOX.pdb
add_amber_ter
resnumbers 2 <important: otherwise tleap will complain>

structure water.pdb
  number 1000 <number of water molecules will depend on the density>
  inside box 0. 0. 0. 40. 40. 40. <box edges>
end structure

structure protein.pdb
  number 1
  inside box 0. 0. 0. 40. 40. 40.
end structure

And then use tleap/xleap with the command:

>loadpdb BOX BOX.pdb
>setbox BOX centers
>saveamberparm BOX BOX.top BOX.crdi......

Of course you need to load the prep/off files and the forcefield
(parm03, or whatever) before loading BOX.pdb

Lorenzo

Il 26 aprile 2012 15:34, francesco oteri <francesco.oteri.gmail.com> ha scritto:
> Hi bala,
> I don't know how to do in amber,  but you can use the solvate module in vmd
> and then using the generated pdb in tleap
>
> Francesco
>
> Il giorno 26 aprile 2012 11:44, Bala subramanian
> <bala.biophysics.gmail.com>ha scritto:
>
>> Hi Amber users,
>> I want to create a box of 40Ang and then place the protein and water inside
>> the box. Is there any way i can do the same in xleap. While i am aware that
>> the solvent box can be create with solvateBox command, i am not sure if it
>> can create a box of fixed size.
>>
>> Do i need to play with the distance parameter in solvateBox command, so as
>> to get the box of desired size.
>>
>> Thanks,
>> Bala
>> _______________________________________________
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>> http://lists.ambermd.org/mailman/listinfo/amber
>>
>
>
>
> --
> Cordiali saluti, Dr.Oteri Francesco
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-- 
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 Lorenzo Gontrani
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EDXD group of University of Rome "La Sapienza"
 GSM +39 338 7615798
 Email l DOT gontrani AT caspur DOT it
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Received on Thu Apr 26 2012 - 07:00:04 PDT
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