Re: [gmx-users] Verlet scheme and relative free binding energy

2016-02-02 Thread Mark Abraham
Hi, One can vary PME parameters for electrostatics at approximately constant accuracy by scaling the Fourier grid spacing and short-range cutoff by the same factor. (This is what mdrun does during PME tuning.) So you can use rcoulomb = 1.0 and spacing scaled accordingly. In GROMACS 2016, the Verl

[gmx-users] Verlet scheme and relative free binding energy

2016-02-02 Thread Dries Van Rompaey
Hi gmx-users, I have a question regarding the correct treatment of cut-offs for amber99sb-ildn in relative free binding energy calculations, using the verlet scheme. Many articles seem to use a 1.2 nm cutoff for coulomb interactions and a vdw interaction switched off between 0.9 and 1 nm (for inst