Dihedral/Index

Dihedral angles in proteins and the Ramachandran plotDihedral angles in proteins and the Ramachandran plot

This in an index page pointing to several resources on these topics.

• Definition of phi and psi:
  • Simplified 3D models in JSmol that can be rotated with your mouse, and set to various dihedral angles: in English and Spanish.

• Dihedral angles in proteins: an interactive display of phi and psi dihedral angles using a model of a tripeptide.
  • A regular page in Proteopedia.
  • Simple presentation, featuring a 3D model with planes, clashes and animations.

• Phi and Psi Angles: a more detailed, guided explanation of determination and display of angles in the 3D model.
  • A regular page in Proteopedia.

• The Ramachandran Plot
  • A regular page in Proteopedia. Featured in an article in Biochemistry and Molecular Biology Education, 2010.
  • Extensive description.

• Ramachandran Plot Inspection
  • A special "Tutorial" page in Proteopedia (by Angel Herráez) and an equivalent page in Spanish
  • Interactive Ramachandran plot with many controls and details, connecting the Ramachandran plot with the display on the 3D model. Includes planes, clashes and animations.

• The Ramachandran Principle, Phi (φ) and Psi (ψ) Angles in Proteins
  • A special "Tutorial" page in Proteopedia (by Eric Martz)
  • That tutorial repurposed as a slideshow with animated images (a Google Docs presentation):
    • slideshow in English including explanation of dihedral angles with animated illustration
    • slideshow in Spanish
  • The slideshow is also available as a YouTube Video (in English), including explanation of dihedral angles with animated illustration.
  • A quiz to self-assess understanding of the tutorial or the slideshow:
    • quiz in English
    • quiz in Spanish

• Another animation of phi and psi angles connected to a Ramachandran plot (by David Jollie)

• Ramachandran outlier showcases a special case where a residue is not conforming to the favored values in the Ramachandran plot.