Syntax:
dihedral_style helix
Examples:
dihedral_style helix dihedral_coeff 1 80.0 100.0 40.0
Description:
The helix dihedral style uses the potential
This coarse-grain dihedral potential is described in (Guo). For dihedral angles in the helical region, the energy function is represented by a standard potential consisting of three minima, one corresponding to the trans (t) state and the other to gauche states (g+ and g-). The paper describes how the A,B,C parameters are chosen so as to balance secondary (largely driven by local interactions) and tertiary structure (driven by long-range interactions).
The following coefficients must be defined for each dihedral type via the dihedral_coeff command as in the example above, or in the data file or restart files read by the read_data or read_restart commands:
Restrictions: none
Related commands:
Default: none
(Guo) Guo and Thirumalai, Journal of Molecular Biology, 263, 323-43 (1996).