; ; Input file ; title = Octamer ; a string cpp = /lib/cpp ; c-preprocessor define = -DFLEX_SPC dt = 0.002 ; time step integrator = steep nsteps = 4000 ; number of steps nstcomm = 1 ; reset c.o.m. motion nstxout = 2000 ; write coords nstvout = 50 ; write velocities nstlog = 50 ; print to logfile nstenergy = 50 ; print energies energygrps = System nstlist = 10 ; update pairlist ns_type = grid constraint_algorithm = shake shake_tol = 0.0001 coulombtype = PME vdwtype = shift rlist = 1.4 ; cut-off for ns rvdw = 1.4 rvdw_switch = 0.8 rcoulomb = 1.4 rcoulomb_switch = 0.8 tcoupl = berendsen ; temperature bath (yes,no) ref_t = 298 tc_grps = Protein tau_t = 0.1 Pcoupl = no tau_p = 0.5 ref_p = 1.0 gen_vel = yes ; generate initial velocities gen_temp = 298 ; initial temperature gen_seed = 173529 ; random seed emtol = 100 emstep = 0.01