Helices in Proteins
From Proteopedia
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The alpha helix is by far the most common helix. Note that it is a right-handed helix when formed with the common L-amino acids. (It is left-handed when formed with D-amino acids.) When viewed from either end, right-handed helices turn clockwise when followed away from you. | The alpha helix is by far the most common helix. Note that it is a right-handed helix when formed with the common L-amino acids. (It is left-handed when formed with D-amino acids.) When viewed from either end, right-handed helices turn clockwise when followed away from you. | ||
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| + | ==See Also== | ||
| + | *[http://en.wikipedia.org/wiki/Alpha_helix Alpha helix] at Wikipedia. | ||
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| + | ==References== | ||
| + | <references /> | ||
Revision as of 20:18, 11 April 2011
Helical conformations in proteins
This page illustrates the 3 most common helical conformations (secondary structures) found in proteins.
All are decapeptide segments extracted from actual protein structures in the PDB. They are shown using the same scale, for a better comparison (as a consequence, zoom in the Jmol applets is disabled).
| 310 helix | alpha helix | pi helix | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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|
|
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310
|
3.613
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4.416
|
The alpha helix is by far the most common helix. Note that it is a right-handed helix when formed with the common L-amino acids. (It is left-handed when formed with D-amino acids.) When viewed from either end, right-handed helices turn clockwise when followed away from you.
See Also
- Alpha helix at Wikipedia.
