title = OPLS Lysozyme NVT equilibration define = -DPOSRES ; position restrain the protein ; Run parameters integrator = md ; leap-frog integrator nsteps = 500 ; 2 * 50000 = 100 ps dt = 0.002 ; 2 fs ; Output control nstxout = 50 ; save coordinates every 1.0 ps nstvout = 50 ; save velocities every 1.0 ps nstenergy = 50 ; save energies every 1.0 ps nstlog = 50 ; update log file every 1.0 ps nstxout-compressed = 50 ; save compressed coordinates every 10.0 ps ; Bond parameters continuation = no ; first dynamics run constraint_algorithm = lincs ; holonomic constraints constraints = all-bonds ; all bonds (even heavy atom-H bonds) constrained lincs_iter = 1 ; accuracy of LINCS lincs_order = 4 ; also related to accuracy ; Neighborsearching cutoff-scheme = Verlet ns_type = grid ; search neighboring grid cells nstlist = 10 ; 20 fs, largely irrelevant with Verlet rcoulomb = 1.0 ; short-range electrostatic cutoff (in nm) rvdw = 1.0 ; short-range van der Waals cutoff (in nm) ; Electrostatics coulombtype = PME ; Particle Mesh Ewald for long-range electrostatics pme_order = 4 ; cubic interpolation fourierspacing = 0.16 ; grid spacing for FFT ; Temperature coupling is on tcoupl = V-rescale ; modified Berendsen thermostat tc-grps = Protein Non-Protein ; two coupling groups - more accurate tau_t = 0.1 0.1 ; time constant, in ps ref_t = 300 300 ; reference temperature, one for each group, in K ; Pressure coupling is off pcoupl = no ; no pressure coupling in NVT ; Periodic boundary conditions pbc = xyz ; 3-D PBC ; Dispersion correction DispCorr = EnerPres ; account for cut-off vdW scheme ; Velocity generation gen_vel = yes ; assign velocities from Maxwell distribution gen_temp = 300 ; temperature for Maxwell distribution gen_seed = -1 ; generate a random seed