AMBER Archive (2007)

Subject: Re: AMBER: ff99 vs ff99SB for RNA

From: Carlos Simmerling (carlos.simmerling_at_gmail.com)
Date: Thu Jun 14 2007 - 09:57:02 CDT


Hi Brent,
ff99SB only changed the protein phi/psi specific torsions.
I don';t recall saying DNA was different, I can't think of any
reason why it would be.
carlos

On 6/14/07, Brent Krueger <kruegerb_at_hope.edu> wrote:
>
> Everyone,
>
> I believe this is a pretty simple question about recent force
> fields. In looking through the ff99SB frcmod file, it looks to me
> like these dihedrals should not have any effect on DNA or RNA. But,
> I recall Carlos mentioning something about a small difference in DNA
> behavior between ff99 and ff99SB on this list recently.
>
> Am I remembering Carlos's statement incorrectly, or am I looking at
> the frcmod file incorrectly?
>
>
> Thanks,
> Brent
>
>
>
> __________________________________________________________________
> Brent P. Krueger phone: 616 395 7629
> Associate Professor fax: 616 395 7118
> Hope College SC 2120
> Department of Chemistry
> Holland, MI 49423
>
>
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