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User:Tilman Schirmer/Sandbox 100
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| - | extended chain: phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>), model, Cα-trace; this is the beta-strand conformation found in beta-sheets<br> | + | extended chain: phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>), <scene name='User:Tilman_Schirmer/Sandbox_100/Beta/1'>model</scene>, Cα-trace; this is the beta-strand conformation found in beta-sheets<br> |
phi-psi = (70<sup>o</sup>, -180<sup>o</sup>), model, Cα-trace; note that there are clashes (where?)<br> | phi-psi = (70<sup>o</sup>, -180<sup>o</sup>), model, Cα-trace; note that there are clashes (where?)<br> | ||
phi-psi = (-60<sup>o</sup>, -40<sup>o</sup>), model, Cα-trace; this is the alpha-helical conformation<br> | phi-psi = (-60<sup>o</sup>, -40<sup>o</sup>), model, Cα-trace; this is the alpha-helical conformation<br> | ||
Revision as of 12:56, 15 March 2009
Contents |
Secondary structure of proteins
Repetitive torsion angles
A polypeptide chain with a repetition of identical phi-psi torsion angles yields a helical structure.
Examples:
...
Drag the structure with the mouse to rotate fully extended chain: phi-psi = (180o, 180o), ,
extended chain: phi-psi = (-140o, 130o), , Cα-trace; this is the beta-strand conformation found in beta-sheets
phi-psi = (70o, -180o), model, Cα-trace; note that there are clashes (where?)
phi-psi = (-60o, -40o), model, Cα-trace; this is the alpha-helical conformation
phi-psi = (-50o, -26o), model, Cα-trace; this is the conformation of a 310 helix
