Data Item _nef_dihedral_restraint_list.potential_type

General

Item name
_nef_dihedral_restraint_list.potential_type
Category name
nef_dihedral_restraint_list
Attribute name
potential_type
Required in PDB entries
yes
Used in currrent PDB entries
No

Item Description

The potential type used to model the dihedral restraints.

Item Example

 parabolic

Data Type

Data type code
potential_type
Data type detail
enumeration for Restraint list potential types Potential types are defined aS follows:: - log-harmonic: Parameters: target_value, target_value_error - parabolic: Parameters: target_value, target_value_error Formula: E = k(r-target_value)**2 - square-well-parabolic: Parameters: upper_limit, lower_limit (optionally: target_value, target_value_error) Formula: E = k(r-upper_limit)**\2 for r > upper_limit E = k(r-lower_limit)**2 for r < lower_limit - 'square-well-parabolic-linear: Parameters: upper_limit, lower_limit, upper_linear_limit, lower_linear_limit, (optional: target_value, target_value_error) Formula: If upper_limit = u, upper_linear_limit = u2, lower_limit = l, lower_linear_limit = l2: E = 2k(u2-u)(r - (u2+u)/2) for r > u2 E = k(r-u)**2 for u < r < u2 E = k(r-l)**2 for l > r > l2 E = 2k(l2-l)(r - (l2+l)/2) for r < l2 Additional potential types ('upper-bound-parabolic', 'lower-bound-parabolic', 'upper-bound-parabolic-linear', 'lower-bound-parabolic-linear') can be derived from the two-sided versions given above.
Primitive data type code
char
Regular expression
undefined|log-harmonic|parabolic|square-well-parabolic|square-well-parabolic-linear|upper-bound-parabolic|lower-bound-parabolic|upper-bound-parabolic-linear|lower-bound-parabolic-linear