title: Multipurpose peptide tags for protein isolation.
abstract: A multifunctional peptide tag (HYDHYD) consisting of histidine, tyrosine and aspartate residues was fused to the N-terminal ends of green fluorescent protein (GFP), lactate dehydrogenase (LDH) and human hemoglobin (Hb), proteins which were subjected to ion-exchange chromatography (IEC), aqueous two-phase system partition, immobilized metal-ion affinity chromatography (IMAC), and hydrophobic interaction chromatography (HIC). Tagged GFP was retained significantly longer (>1 column volume) in both HIC and IEC. It exhibited 3x greater partition in favor of the hydrophobic phase in a two-phase system and 96% could be bound to an IMAC column which did not bind native GFP.
authors.affiliation: Department of Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
authors.forename: Kristian
authors.initials: K
authors.lastname: Becker
authors.forename: James
authors.initials: J
authors.lastname: Van Alstine
authors.forename: Leif
authors.initials: L
authors.lastname: Bülow
mesh_terms: D002846:Chromatography, Affinity / Q000379:methods; D002852:Chromatography, Ion Exchange / Q000379:methods; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D006454:Hemoglobins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D006801:Humans; D007770:L-Lactate Dehydrogenase / Q000235:genetics / Q000378:metabolism; D008958:Models, Molecular; D010455:Peptides / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D011487:Protein Conformation; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D006454:Hemoglobins; D010455:Peptides; D011993:Recombinant Fusion Proteins; D049452:Green Fluorescent Proteins; D007770:L-Lactate Dehydrogenase