1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Why g-proteins has a shape of a helix?

  1. Feb 26, 2005 #1
    does anyone know why g-proteins has a shape of a helix??
     
  2. jcsd
  3. Feb 26, 2005 #2

    iansmith

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

  4. Feb 27, 2005 #3

    Monique

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    G-proteins are stuck in membranes, thus they have a structure that allows them to be most stable.
     
  5. Feb 27, 2005 #4

    Moonbear

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    It's just the most chemically stable conformation of the protein. In a way, the question is asked a bit backward. The important question isn't why a g-coupled protein would form a helix, but why a helical structure would be advantageous to the function of a g-coupled protein. The simplified answer to that question is that it allows the hydrophobic region of the protein to interact with the hydrophobic cell membrane.
     
  6. Feb 27, 2005 #5

    Monique

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Yes, the hydrophilic amino-acids can turn inwards of the helix in a beta-sheet such shealding is difficult.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Why g-proteins has a shape of a helix?
  1. Helix Classifications (Replies: 0)

Loading...