Dihedral/Dihedral angles in proteins

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(rotation around psi angle)
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the animation of rotation for ψ, and then:
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Revision as of 22:04, 14 July 2016

Theoretical Model: The protein structure described on this page was determined theoretically, and hence should be interpreted with caution.

Dihedral angles in proteins: Phi and Psi

The model displayed on the right is a tripeptide (Trp34–Glu35–Ser36 within the protein lysozyme). This page illustrates the meaning of phi (ϕ) and psi (ψ) angles, both around the alpha carbon of the central residue (Glu35).

You can run animations that continuously rotate the model changing one of the angles, or use the slider or controls to manually progress through different values of the angles. Bright magenta cylinders are displayed where neighbour atoms collide (hence there is an unfavourable conformation for those ϕ, ψ values).

Animation of rotation for ϕ:


the animation of rotation for ψ, and then:

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

Angel Herraez

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