[gmx-users] OPLS-AA atom types

[Justin A. Lemkul]

Austin B. Yongye wrote:
> Thanks Justin.
> Could you/someone please forward the file? I don't have it.

It's part of your Gromacs installation.  $GMXLIB/oplsaa.ff/ffnonbonded.itp.

If you don't have it, then Gromacs wasn't properly installed and you won't be 
able to use whatever force field for which you're designing your topologies.

-Justin

> Austin-
> 
> --- On Tue, 4/5/11, Justin A. Lemkul <jalemkul at vt.edu> wrote:
> 
>> From: Justin A. Lemkul <jalemkul at vt.edu>
>> Subject: Re: [gmx-users] OPLS-AA atom types
>> To: "Discussion list for GROMACS users" <gmx-users at gromacs.org>
>> Date: Tuesday, April 5, 2011, 5:19 AM
>>
>>
>> Austin B. Yongye wrote:
>>> Hello GROMACS USERS,
>>> Does any one have a document/manual/link that
>> describes the name-number atom type mappings employed in
>> opls-aa?
>> The correspondence between the atom types and bonded types
>> is all contained in ffnonbonded.itp.
>>
>> -Justin
>>
>>> I would like to build some molecules and specify their
>> parameters, but I see different of numbers for the same atom
>> type name, e.g:
>>> TYPE NAME
>>> 135  CT
>>> 136  CT
>>> 137  CT
>>> 157  CT
>>>
>>> I can deduce that 135 is CH3-, 136 is R-CH2-, and 137
>> is RRCH- by looking at topology files.
>>> Thanks,
>>> Austin-
>> -- ========================================
>>
>> Justin A. Lemkul
>> Ph.D. Candidate
>> ICTAS Doctoral Scholar
>> MILES-IGERT Trainee
>> Department of Biochemistry
>> Virginia Tech
>> Blacksburg, VA
>> jalemkul[at]vt.edu | (540) 231-9080
>> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>
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-- 
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

========================================