User:Karsten Theis/turns
From Proteopedia
(Difference between revisions)
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| - | + | A ***turn*** is a secondary structure element consisting of four consecutive amino acids. Turns represent a change in the direction of the polypeptide backbone, allowing to connect alpha helices and beta strands at the surface of a globular protein. Of the six main chain hydrogen bonding partners of a turn, a maximum of two are engaged in hydrogen bonding, so turns are rarely found in the hydrophobic core. | |
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| - | Here is a turn (reload original <scene name='10/1072233/Turn/5'>conformation</scene>) that you can explore with the buttons below. To get a low energy conformation, you want a good hydrogen bond, i.e. carbonyl oxygen, amide hydrogen and nitrogen colinear <jmol> | + | ==Turns== |
| + | <StructureSection load='' size='500' side='right' caption='' scene='10/1072233/Turn/5'>Here is a turn (reload original <scene name='10/1072233/Turn/5'>conformation</scene>) that you can explore with the buttons below. To get a low energy conformation, you want a good hydrogen bond, i.e. carbonyl oxygen, amide hydrogen and nitrogen colinear <jmol> | ||
<jmolLink> | <jmolLink> | ||
<script> | <script> | ||
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</jmol> of the side chains. | </jmol> of the side chains. | ||
| - | <jmol> | + |  <jmol> |
<jmolButton> | <jmolButton> | ||
<script>rotate BRANCH {68.CA} {68.N} 10</script> | <script>rotate BRANCH {68.CA} {68.N} 10</script> | ||
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</jmolButton> | </jmolButton> | ||
</jmol> | </jmol> | ||
| - | + |  <jmol> | |
| - | + | ||
| - | <jmol> | + | |
<jmolButton> | <jmolButton> | ||
<script>rotate BRANCH {69.N}{69.CA} 10</script> | <script>rotate BRANCH {69.N}{69.CA} 10</script> | ||
<text>+</text> | <text>+</text> | ||
</jmolButton> | </jmolButton> | ||
| - | </jmol> Phi 3<jmol> | + | </jmol> Phi 3 <jmol> |
<jmolButton> | <jmolButton> | ||
<script>rotate BRANCH {69.N}{69.CA} -10</script> | <script>rotate BRANCH {69.N}{69.CA} -10</script> | ||
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<text>-</text> | <text>-</text> | ||
</jmolButton> | </jmolButton> | ||
| - | </jmol> | + | </jmol>   <jmol> |
| - | + | ||
| - | + | ||
| - | + | ||
| - | <jmol> | + | |
<jmolButton> | <jmolButton> | ||
<script>original = {all}.xyz.all;rotate BRANCH {68.CA}{68.C} 180;rotate BRANCH {69.N}{69.CA} 180;rotate COMPARE {all} @original | <script>original = {all}.xyz.all;rotate BRANCH {68.CA}{68.C} 180;rotate BRANCH {69.N}{69.CA} 180;rotate COMPARE {all} @original | ||
Revision as of 20:18, 7 February 2025
A ***turn*** is a secondary structure element consisting of four consecutive amino acids. Turns represent a change in the direction of the polypeptide backbone, allowing to connect alpha helices and beta strands at the surface of a globular protein. Of the six main chain hydrogen bonding partners of a turn, a maximum of two are engaged in hydrogen bonding, so turns are rarely found in the hydrophobic core.
Turns
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