User:Eric Martz/Sandbox 10

Proposed Title: Gramicidin Channel in Lipid Bilayer

Theoretical Model: The structure described on this page was determined theoretically, and hence should be interpreted with caution.

spinqualitylabelsall models Theoretical model of gramicidin in a lipid bilayer (phosphatidyl ethanolamine). Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

Two copies of the gramicidin protein are shown here () arranged as they are believed to be when they form a channel through a lipid bilayer membrane. The shape of the protein is shown transparent (ghostly), and a backbone trace connecting the alpha carbon atoms of each amino acid chain is opaque (solid).

• Show of the gramicidin protein chains.
• (Most hydrogen atoms are omitted.)
• Show . Notice how the hydrophobic lipid "tails" exclude water.
• Water passes .
• Show .

Remember to use the popup button and then resize the popup window to enlarge the molecular scenes.

See AlsoSee Also

• A detailed explanation and tutorial about Lipid Bilayers and the Gramicidin Channel.
• This model in FirstGlance in Jmol. Be sure to click the Ligands+ and Water buttons!
• BioMolecular Explorer 3D, a resource for high school teachers that includes a section on gramicidin in a lipid bilayer.
• High school teachers' resources

NotesNotes

• The PDB file shown here, File:Gramicidin in bilayer.pdb.gz, was kindly provided by Serge Crouzy.