Beta pleated sheet vs alpha helix

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    • #338
      Edher
      Participant

      Hello,

      What property, in a polypeptide. decides wheter its secundary structure is alpha helix or beta pleated sheet?

      Thank You, Edher

    • #19217
      biostudent84
      Participant

      It’s the locations of the Carboxyl and Nitrate groups in the chains. They hydrogen bond to each other and form the structure.

    • #56361
      Huxdar
      Participant

      biostudent84 means carboxyl and amino groups (not nitrate). But that doesn’t answer the question why a helix rather than a sheet.

    • #56362
      oppox
      Participant

      thats a hard question and its not possible to answer diffenatly. Some aminoacids are said to be for an example helical inducers, like leucine and alanine. proline for an example is often found in hairpins. But there is no rule without exceptions so…

    • #56588
      lara
      Participant

      excess proline can cause kinking enhancing beta pleat formation while more no: of polar amino acids can result in h-bonding(intramolecular) to form alpha helix

    • #56649
      Dr.Stein
      Participant

      OMG this thread is killing me 😯 😆 Ask Victor why :mrgreen:

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