[gmx-users] DNA-protein complex - which force field to use?

[Jernej Zidar]

Hi everyone!
  I would like to study a DNA-protein complex. The protein part is
composed of aminoacids covalently attached to the DNA bases. Which
force field would you recommend? Based on recent experience I was
thinking of using either OPLS-aa or CHARMM. OPLS-aa would be the
prefered choice because it performs way better than CHARMM.

  Any recommendations or experiences?

Thanks in advance!

Jernej