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ÎÒÄ£ÄâµÄÊDzÏË¿µ°°×ÖÊÔÚË®ÈÜÒºÖеĶþ¼¶½á¹¹µÄ±ä»¯¡£ÔÚnvtºóζȴﵽ300K£¬µ«ÊÇ×önptʱ£¬Ñ¹Ç¿Æ½¾ùÖµÒ»Ö±´ï²»µ½É趨µÄ1bar¡£ ÕâÊÇÎÒµÄnpt.mdpÎļþ£¬Çó¸ßÈËÖ¸µã¡£ ÆäÖмÆËãʱ¼äÊÇ100psʱ£¬Ñ¹Ç¿Îª-15bar£¬200psºóΪ-8bar£¬µ«ÊÇ1000psºó£¬Ñ¹Ç¿ÒÀȻΪ-8bar×óÓÒ¡£Óë200psʱ²î±ð²»´ó¡£ define = -DPOSRES ; position restrain the protein ; Run parameters integrator = md ; leap-frog integrator nsteps = 500000 ; 2 * 50000 = 1000 ps dt = 0.002 ; 2 fs ; Output control nstxout = 1000 ; save coordinates every 2 ps nstvout = 1000 ; save velocities every 2 ps nstenergy = 1000 ; save energies every 2 ps nstlog = 1000 ; update log file every 2 ps ; Bond parameters continuation = yes ; Restarting after NVT 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 ns_type = grid ; search neighboring grid cells nstlist = 5 ; 10 fs rlist = 1.0 ; short-range neighborlist cutoff (in nm) 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 on pcoupl = Parrinello-Rahman ; Pressure coupling on in NPT pcoupltype = isotropic ; uniform scaling of box vectors tau_p = 2.0 ; time constant, in ps ref_p = 1.0 ; reference pressure, in bar compressibility = 4.5e-5 ; isothermal compressibility of water, bar^-1 refcoord_scaling = com ; Periodic boundary conditions pbc = xyz ; 3-D PBC ; Dispersion correction DispCorr = EnerPres ; account for cut-off vdW scheme ; Velocity generation gen_vel = no ; Velocity generation is off |
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