CYANA Command: write aco

From CYANA Wiki
Jump to navigation Jump to search

Write torsion angle restraints

Parameters

file=filename.aco
(required) The name of the output torsion angle restraint file. The default filename extension ".upl" is used unless a filename extension is given explicitly.
redac
Option to derive redundant dihedral angle restraints for the REDAC strategy (Güntert & Wüthrich, 1991). See description below.
xplor
Option to output the file in the format of the program XPLOR instead of the standard angle restraint file format of the program CYANA.
structures=integer
(default: 10) The minimal number of structures in which the local target function of a residue and its immediate sequential neighbors must be below the value of the ang_cut to generate a dihedral angle restraint for the REDAC strategy. This parameter can only be used in conjunction with the 'redac option.
maxwidth=real
(default: 270.0 degrees) The maximal width of the allowed range of a dihedral angle restraint for the REDAC strategy. This parameter can only be used in conjunction with the 'redac option.
append
Option to append the output to the given file. By default, an already existing output file is overwritten.

Description

Writes a file with the currently torsion angle restraints in the standard torsion angle restraint file format of the program CYANA, or optionally in XPLOR format.

Optionally, redundant dihedral angle restraints for the Redac strategy (Guentert & Wuethrich, 1991) may be derived from the current angle statistics and included in the output (option redac; see the commands angstat make and redac). In order to generate redundant dihedral angle restraints for a given residue, its local target function value (and that of its immediate neighbors must be below the cutoff value given by the variable [CYANA Variable: ang_cut|ang_cut] in at least N structures. Redundant dihedral angle restraints with an allowed range wider than Df degrees are discarded. The parameters structures and maxwidth can only be in conjunction with the redac option.

Instead of the command

write aco filename.aco

the shorthand version

write filename.aco

can be used if the filename extension is ".aco".