I think that it is worth having a central repository that lists modifications
to forcefield files during development -- especially
changes as opposed to simple additions. It's not always a huge deal, but it would be nice if this information was easily available.
Revision history might be one place for it, but the wiki would also suffice.
This change to OPLSAA TYR charge groups appears to have been made between gromacs 3.3.1 and 3.3.3.
Based on:
http://www.gromacs.org/pipermail/gmx-users/2006-December/025075.html
Adam Mazur wrote:
/ Dear All!
/>/
/>/ I have noticed an error in TYR residue in OPLS-AA, Gromacs 3.3.1
/>/ Have a look at ffoplsaanr.rtp:
/>/ CG of TYR should be in the same charge group as CB,HB1 and HB2.
/>/
/>/ [ TYR ]
/>/ [ atoms ]
/>/ N opls_238 -0.500 1
/>/ H opls_241 0.300 1
/>/ CA opls_224B 0.140 1
/>/ HA opls_140 0.060 1
/>/ CB opls_149 -0.005 2
/>/ HB1 opls_140 0.060 2
/>/ HB2 opls_140 0.060 2
/>/ CG opls_145 -0.115 3 <---
/>/ CD1 opls_145 -0.115 4
/>/ HD1 opls_146 0.115 4
/>/ ....
/>/
/>/ Maybe, it's not of great importance, but it would be nice to have a correct
/>/ version.
/>/
/Thanks for pointing that out. As long as one is using PME there is no
difference, but when using cut-offs there might be an issue.
--
David.
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