Add an option to restrain non-canonical NA pairs #1397
Description
Desired feature/enhancement
Add a new parameter, similar to dnarest_on, but to restraint non-canonical nucleopairs, spesifically most common ones: G-U, G-A, A-U and G-A.
Motivation
Requested by @vcojocaru
Description
The idea is to have an autoamatic way to create restraints for the non-canonical nucleopairs.
In pripciple, the algorithm shold be very similar to what src/haddock/modules/refinement/flexref/cns/dna-rna_restraints.cns does for Watson-Crick base pairs - automatically pick true distances from structure, set upper/lower margin to 0.05.
And to make this accessible via a separate parameter, e.g. nc_narest_on, where “nc” stands for "non-canonical”.
Additional context
I am not yet certain if there is a point in working on adding various dihedral angle restraints. In any case, I neet to start with distance restraints; (there was a second point I am not sertain about, but I cannot remember what is was)