BCH210H1 Lecture Notes - Lecture 6: Beta Barrel, Beta Sheet, Solvent
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BCH210H1 Full Course Notes
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Detergents can be used to extract proteins. Salts can be used to disrupt peripheral proteins: change charge on outside on peripheral proteins, peripheral proteins interacting electrostatic binding to membrane, changing charge, be able to remove them using salts to compete and ph to change pka. Organic solvents can be used to solubilize lipids: different compositions of lipids, using organic solvent denature proteins. Integral (intrinsic) cross the membrane (red: single spanning one transmembrane helix, type i & ii, cross membrane once, n-term on outside (type i, n-term on inside (type 2, multispanning 2-24 transmembrane helices. Looping back and forth across membrane: beta barrels multiple beta sheets come together. Lipid anchored fatty acid chains or gpi anchors are covalently attached to protein (blue: to remove: use detergents or cleave off lipid tail to release protein. Sugars are covalently linked to a loop of the protein on the external face of the protein: always found outside of protein.