[gmx-users] Pi Stacking in OPLSAA ff

[Ramya Cherukupalli]

Dear all,

    I am trying to simulate a mutant lipase molecule using OPLS AA
forcefield. In the crystal structure study, presence of a Pi-stacking
interaction has been proposed to help in enhancement of thermostable
behavior of the mutant.

I wanted to clarify 2 things..

1. Does OPLS AA parameterize/recognize Pi-stacking?? Actually i do have
read some papers  which dealt with pi-stacking using OPLS ff but nothing
is mentioned whether we have to declare pi-stacking as a *patch* for the
ff to identify.. or not????

2. I am not sure about the process of creating a *patch* in Gromacs.. So,
can anyone help me out for the same.. ????

      If anyone has worked in this earlier, suggestions are welcome..

Thank you in advance,
Regards,

-----------------------
Ramya Cherukupalli,
M.S (by Research) Bioinformatics,
IIIT - H.