title: Protein purification using PDZ affinity chromatography.
abstract: PDZ domains function in nature as protein-binding domains within scaffold and membrane-associated proteins. They comprise approximately 90 residues and undergo specific, high-affinity interactions with complementary C-terminal peptide sequences, other PDZ domains, and/or phospholipids. We have previously shown that the specific, strong interactions of PDZ domains with their ligands make them well suited for use in affinity chromatography. This unit provides protocols for the PDZ affinity chromatography procedure that are applicable for the purification of proteins that contain PDZ domains or PDZ domain-binding ligands, either naturally or introduced by genetic engineering. We detail the preparation of affinity resins composed of PDZ domains or PDZ domain peptide ligands coupled to solid supports. These resins can be used to purify proteins containing endogenous or genetically introduced PDZ domains or ligands, eluting the proteins with free PDZ domain peptide ligands.
authors.affiliation: Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, California.
authors.forename: Ward G
authors.initials: WG
authors.lastname: Walkup
authors.affiliation: Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, California.
authors.forename: Mary B
authors.initials: MB
authors.lastname: Kennedy
mesh_terms: D000345:Affinity Labels; D000595:Amino Acid Sequence; D000818:Animals; D002846:Chromatography, Affinity / Q000379:methods*; D008969:Molecular Sequence Data; D054731:PDZ Domains; D011506:Proteins / Q000302:isolation & purification*; D011993:Recombinant Fusion Proteins / Q000302:isolation & purification
chemical_list: D000345:Affinity Labels; D011506:Proteins; D011993:Recombinant Fusion Proteins
keywords: PDZ domain; affinity chromatography; affinity tag; ligand; matrices; peptide; protein purification
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