Secondary structure: Difference between revisions

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Secondary structure of a protein refers to the three-dimensional structure of local segments of a protein. Each type of secondary structure has segments that have a repeating conformational pattern which is produced by a repeating pattern of values for the [[Psi and Phi Angles|phi and psi torsional angles]]. For this reason on a [[Ramachandran Plots|Ramachandran plot]] for a particular secondary structure the values for phi and psi are located at a particular area of the plot. for example alpha helices and beta sheets are secondary structure. The structure on the right of a human transferrin n-lobe mutant (PDB code [[1dtg]]) is shown in cartoon backbone representation to highlight its secondary structure, with alpha-helices in magenta and beta-sheets in yellow.

Secondary structure of a protein refers to the three-dimensional structure of local segments of a protein. Each type of secondary structure has segments that have a repeating conformational pattern which is produced by a repeating pattern of values for the [[Psi and Phi Angles|phi and psi torsional angles]]. For this reason on a [[Ramachandran Plots|Ramachandran plot]] for a particular secondary structure the values for phi and psi are located at a particular area of the plot. There are three important second structures - helix, β-sheets and turns, and there are several variations of each one of them. Alpha helix, pi helix and 3<sub>10</sub> helix are the three types of helices with the alpha helix being the most important. The characteristics of these three helices are given at [[Helices in Proteins]].

for example alpha helices and beta sheets are secondary structure. The structure on the right of a human transferrin n-lobe mutant (PDB code [[1dtg]]) is shown in cartoon backbone representation to highlight its secondary structure, with alpha-helices in magenta and beta-sheets in yellow.

For more information, see [http://en.wikipedia.org/wiki/Secondary_structure Wikipedia's page on secondary structure].

Secondary structure: Difference between revisions

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 <applet load='1dtg' size='400' frame='true' align='right' caption='1dtg' scene='Cartoon_backbone_representation/1dtg_ss/1'/>
-Secondary structure of a protein refers to the three-dimensional structure of local segments of a protein.  Each type of secondary structure has segments that have a repeating conformational pattern which is produced by a repeating pattern of values for the [[Psi and Phi Angles|phi and psi torsional angles]].  For this reason on a [[Ramachandran Plots|Ramachandran plot]] for a particular secondary structure the values for phi and psi are located at a particular area of the plot. for example alpha helices and beta sheets are secondary structure. The structure on the right of a human transferrin n-lobe mutant (PDB code [[1dtg]]) is shown in cartoon backbone representation to highlight its secondary structure, with alpha-helices in magenta and beta-sheets in yellow.
+Secondary structure of a protein refers to the three-dimensional structure of local segments of a protein.  Each type of secondary structure has segments that have a repeating conformational pattern which is produced by a repeating pattern of values for the [[Psi and Phi Angles|phi and psi torsional angles]].  For this reason on a [[Ramachandran Plots|Ramachandran plot]] for a particular secondary structure the values for phi and psi are located at a particular area of the plot. There are three important second structures - helix, β-sheets and turns, and there are several variations of each one of them. Alpha helix, pi helix and 3<sub>10</sub> helix are the three types of helices with the alpha helix being the most important.  The characteristics of these three helices are given at [[Helices in Proteins]].
+ for example alpha helices and beta sheets are secondary structure. The structure on the right of a human transferrin n-lobe mutant (PDB code [[1dtg]]) is shown in cartoon backbone representation to highlight its secondary structure, with alpha-helices in magenta and beta-sheets in yellow.
 For more information, see [http://en.wikipedia.org/wiki/Secondary_structure Wikipedia's page on secondary structure].
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