User:Tilman Schirmer/Sandbox 110
From Proteopedia
(Difference between revisions)
| Line 14: | Line 14: | ||
---- | ---- | ||
| + | phi-psi = (-110<sup>o</sup>, 130<sup>o</sup>), extended chain: | ||
| + | <scene name='User:Tilman_Schirmer/Sandbox_100/Beta_m110_130/1'>cartoon</scene>, | ||
| + | <scene name='User:Tilman_Schirmer/Sandbox_100/Beta_m110_130/2'>main-chain</scene> | ||
| + | <scene name='User:Tilman_Schirmer/Sandbox_100/Beta_m110_130/3'>Calpha-trace</scene>; this is the '''β-strand''' conformation found in beta-sheets <br> | ||
| + | |||
phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>), extended chain: | phi-psi = (-140<sup>o</sup>, 130<sup>o</sup>), extended chain: | ||
Revision as of 13:20, 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
phi-psi = (-140o, 130o), extended chain:
,
; this is the β-strand conformation found in beta-sheets
Note:
polypeptide forms a with side-chains protruding towards alternating (up, down) directions
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: ,
