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User:Tilman Schirmer/Sandbox 100
From Proteopedia
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== Secondary structure of proteins == | == Secondary structure of proteins == | ||
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====Repetitive torsion angles ==== | ====Repetitive torsion angles ==== | ||
<applet load='180-180.pdb' size='300' frame='true' align='right' scene='User:Tilman_Schirmer/Sandbox_100/Extended/2'/> | <applet load='180-180.pdb' size='300' frame='true' align='right' scene='User:Tilman_Schirmer/Sandbox_100/Extended/2'/> | ||
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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. | ||
Revision as of 13:26, 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.
fully extended chain: phi-psi = (180o, 180o),
,
extended chain: phi-psi = (-140o, 130o),
,
; this is the beta-strand conformation found in beta-sheets, note the for a polypeptide with this conformation
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
