User:Tilman Schirmer/Sandbox 110
From Proteopedia
(Difference between revisions)
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'''Note''': | '''Note''': | ||
| - | polypeptide forms a <scene name='User:Tilman_Schirmer/Sandbox_110/Beta_m110_130/5'>zig-zag</scene> with side-chains protruding towards alternating (up, down) directions<br> | + | <li> polypeptide forms a <scene name='User:Tilman_Schirmer/Sandbox_110/Beta_m110_130/5'>zig-zag</scene> with side-chains protruding towards alternating (up, down) directions</li><br> |
the polypeptide main-chain is <scene name='User:Tilman_Schirmer/Sandbox_110/Beta_m110_130/4'>right-twisted</scene> as can been seen when looking along the chain <br> | the polypeptide main-chain is <scene name='User:Tilman_Schirmer/Sandbox_110/Beta_m110_130/4'>right-twisted</scene> as can been seen when looking along the chain <br> | ||
Revision as of 13:27, 15 March 2010
Repetitive torsion angles
|
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 = (-110o, 130o), extended chain:
,
,
; this is the β-strand conformation found in beta-sheets
Note:
the polypeptide main-chain is as can been seen when looking along the chain
the point towards alternate directions
phi-psi = (70o, 180o):
,
; note that there are clashes (where?)
phi-psi = (-60o, -40o), α-helix:
,
phi-psi = (-50o, -26o), 310 helix: ,
