[gmx-users] RTP file formats

2011-05-05 Thread Mr Bernard Ramos
Hi everyone!
 
The *.rtp file formats we have on Gromacs rtp file exmaples do not necessarily 
have the [dihedrals] or [impropers] part. They normally only have the [atoms] 
and [bonds]. In fact, the [bonds] section do not enumerate the constants or 
parameters. This is not what is written or shown as an example in the manual. 
Is is ok to just enumerate or list down the [atoms] and [bonds] but not 
including the rest? Thanks. -- 
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Re: [gmx-users] RTP file formats

2011-05-05 Thread Justin A. Lemkul



Mr Bernard Ramos wrote:

Hi everyone!
 
The *.rtp file formats we have on Gromacs rtp file exmaples do not 
necessarily have the [dihedrals] or [impropers] part. They normally only 
have the [atoms] and [bonds]. In fact, the [bonds] section do not 
enumerate the constants or parameters. This is not what is written or 


Different force fields work in different ways.  Gromos, for instance, uses 
#define statements to replace listed gb_*, ga_*, etc.


shown as an example in the manual. Is is ok to just enumerate or list 


The manual shows a generic example, which may not be the same for all force 
fields.


down the [atoms] and [bonds] but not including the rest? Thanks.



Per the example in section 5.6.1, only the [bondedtypes] and [atoms] directives 
are mandatory, but in the case of a bonded molecule, I believe [bonds] are as 
well.  The rest of the directives, if not otherwise specified, are constructed 
from the existing information.


-Justin

--


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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Re: [gmx-users] RTP file formats

2011-05-05 Thread Mr Bernard Ramos
Thanks for the response. We will be using the CHARMM ff. 


--- On Thu, 5/5/11, Justin A. Lemkul jalem...@vt.edu wrote:


From: Justin A. Lemkul jalem...@vt.edu
Subject: Re: [gmx-users] RTP file formats
To: Discussion list for GROMACS users gmx-users@gromacs.org
Date: Thursday, May 5, 2011, 8:38 PM




Mr Bernard Ramos wrote:
 Hi everyone!
  The *.rtp file formats we have on Gromacs rtp file exmaples do not 
necessarily have the [dihedrals] or [impropers] part. They normally only have 
the [atoms] and [bonds]. In fact, the [bonds] section do not enumerate the 
constants or parameters. This is not what is written or 

Different force fields work in different ways.  Gromos, for instance, uses 
#define statements to replace listed gb_*, ga_*, etc.

 shown as an example in the manual. Is is ok to just enumerate or list 

The manual shows a generic example, which may not be the same for all force 
fields.

 down the [atoms] and [bonds] but not including the rest? Thanks.
 

Per the example in section 5.6.1, only the [bondedtypes] and [atoms] directives 
are mandatory, but in the case of a bonded molecule, I believe [bonds] are as 
well.  The rest of the directives, if not otherwise specified, are constructed 
from the existing information.

-Justin

-- 

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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