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