1 .TH genrestr 1 "Thu 16 Oct 2008"
3 genrestr - generates position restraints or distance restraints for index groups
10 .BI "-o" " posre.itp "
11 .BI "-of" " freeze.ndx "
15 .BI "-freeze" " real "
17 .BI "-disre_dist" " real "
18 .BI "-disre_frac" " real "
19 .BI "-disre_up2" " real "
22 genrestr produces an include file for a topology containing
23 a list of atom numbers and three force constants for the
24 X, Y and Z direction. A single isotropic force constant may
25 be given on the command line instead of three components.
28 WARNING: position restraints only work for the one molecule at a time.
29 Position restraints are interactions within molecules, therefore
30 they should be included within the correct
33 block in the topology. Since the atom numbers in every moleculetype
34 in the topology start at 1 and the numbers in the input file for
35 genpr number consecutively from 1, genpr will only produce a useful
36 file for the first molecule.
39 The -of option produces an index file that can be used for
40 freezing atoms. In this case the input file must be a pdb file.
45 option half a matrix of distance restraints
46 is generated instead of position restraints. With this matrix, that
47 one typically would apply to C-alpha atoms in a protein, one can
48 maintain the overall conformation of a protein without tieing it to
49 a specific position (as with position restraints).
53 Structure file: gro g96 pdb tpr tpb tpa
61 Include file for topology
63 .BI "-of" " freeze.ndx"
69 Print help info and quit
71 .BI "-nice" " int" " 0"
74 .BI "-fc" " vector" " 1000 1000 1000"
75 force constants (kJ mol-1 nm-2)
77 .BI "-freeze" " real" " 0 "
78 if the -of option or this one is given an index file will be written containing atom numbers of all atoms that have a B-factor less than the level given here
80 .BI "-[no]disre" "no "
81 Generate a distance restraint matrix for all the atoms in index
83 .BI "-disre_dist" " real" " 0.1 "
84 Distance range around the actual distance for generating distance restraints
86 .BI "-disre_frac" " real" " 0 "
87 Fraction of distance to be used as interval rather than a fixed distance. If the fraction of the distance that you specify here is less than the distance given in the previous option, that one is used instead.
89 .BI "-disre_up2" " real" " 1 "
90 Distance between upper bound for distance restraints, and the distance at which the force becomes constant (see manual)
92 .BI "-[no]constr" "no "
93 Generate a constraint matrix rather than distance restraints