Is there any built-in code in MATLAB that calculates phi-psi angles in pdb file as the bio.pdb module in biopython does?

Bio.pdb module in biopython helps in calculating the dihedral angles (phi-psi angles)

for poly_index, poly in enumerate(polypeptides) :

phi_psi = poly.get_phi_psi_list()

for res_index, residue in enumerate(poly) :

phi, psi = phi_psi[res_index]

Ref: https://warwick.ac.uk/fac/sci/moac/people/students/peter_cock/python/ramachandran/calculate/ramachandran_biopython.py.

Since I found MATLAB easier than biopython, I wanted to know if there's a way to calculate the dihedral angles in MATLAB itself.

Answer 1

[Arthur Goldsipe]

Yes, take a look at the ramachandran function. It's primarily designed to show these angles in a Ramachadran plot, but it has options to turn off the plot and return these angles as an output.

[Masha]

Thank you!