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User:Tilman Schirmer/Sandbox 100

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A polypeptide chain with a repetition of identical phi-psi torsion angles yields a helical structure.
A polypeptide chain with a repetition of identical phi-psi torsion angles yields a helical structure.
-
fully extended chain: phi-psi = (180<sup>o</sup>, 180<sup>o</sup>),
+
phi-psi = (180<sup>o</sup>, 180<sup>o</sup>); fully extended chain:
<scene name='User:Tilman_Schirmer/Sandbox_100/Extended/2'>model</scene>,
<scene name='User:Tilman_Schirmer/Sandbox_100/Extended/2'>model</scene>,
<scene name='User:Tilman_Schirmer/Sandbox_100/Extended/3'> Calpha-trace</scene><br>
<scene name='User:Tilman_Schirmer/Sandbox_100/Extended/3'> Calpha-trace</scene><br>
-
extended chain: phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>),
+
phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>);extended chain,
<scene name='User:Tilman_Schirmer/Sandbox_100/Beta/1'>model</scene>,
<scene name='User:Tilman_Schirmer/Sandbox_100/Beta/1'>model</scene>,
-
<scene name='User:Tilman_Schirmer/Sandbox_100/Beta/2'>Calpha-trace</scene>; this is the beta-strand conformation found in beta-sheets, note the <scene name='User:Tilman_Schirmer/Sandbox_100/Beta/3'>left-twist</scene> for a polypeptide with this conformation <br>
+
<scene name='User:Tilman_Schirmer/Sandbox_100/Beta/2'>Calpha-trace</scene>; this is the β-strand conformation found in beta-sheets, note the <scene name='User:Tilman_Schirmer/Sandbox_100/Beta/3'>left-twist</scene> for a polypeptide with this conformation <br>
phi-psi = (70<sup>o</sup>, -180<sup>o</sup>),
phi-psi = (70<sup>o</sup>, -180<sup>o</sup>),

Revision as of 18:12, 15 March 2009

Contents

Secondary structure of proteins

Repetitive torsion angles

Drag the structure with the mouse to rotate

A polypeptide chain with a repetition of identical phi-psi torsion angles yields a helical structure.

phi-psi = (180o, 180o); fully extended chain: , 

phi-psi = (-140o, 130o);extended chain,

, ; this is the β-strand conformation found in beta-sheets, note the for a polypeptide with this conformation

phi-psi = (70o, -180o), , ; note that there are clashes (where?)

phi-psi = (-60o, -40o), , ; this is the alpha-helical conformation

phi-psi = (-50o, -26o), , ; this is the conformation of a 310 helix


α-Helix

β-sheet

Proteopedia Page Contributors and Editors (what is this?)

Tilman Schirmer

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