Ramachandran plot
From Christoph's Personal Wiki
A Ramachandran plot (also known as a Ramachandran Map or a Ramachandran diagram) is a way to visualize dihedral angles φ against ψ of amino acid residues in protein structure. It shows the possible conformations of φ and ψ angles for a polypeptide.
Phi/Psi and Residue Type
Residues in Ramachandran plots are usually sorted into four separate types:
- Glycine (the small side chain makes the protein backbone very flexible)
- Proline (their large side chain restricts backbone movement)
- Pre-Proline (proline even messed up any residue before it)
- General (not Proline, not Glycine, not before a Proline)
