title: A method for the rapid discovery of naturally occurring products by proteins immobilized on magnetic beads and reverse affinity chromatography.
abstract: A highly efficient screening method for naturally occurring products that bind to a specific target protein was demonstrated by using hVDR magnetic beads. The native ligand 1alpha,25(OH)2 VD3 (1) was selectively bound by hVDR magnetic beads when present in a mixture of natural compounds. Furthermore, this method was shown to be applicable to the identification of natural products that interact with a specific protein immobilized on the beads from an extract of a natural resource. Two new natural compounds were isolated by this method. This approach will be helpful for the discovery of novel, naturally occurring products that bind to specific target proteins. This method has the further advantages that it can identify the HPLC peak corresponding to the target compound for isolation, as well as provide important UV, CD, or MS profile information.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, Inage, Chiba 263-8522 (Japan), Fax: +81 43 290 2913.
authors.forename: Midori A
authors.initials: MA
authors.lastname: Arai
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, Inage, Chiba 263-8522 (Japan), Fax: +81 43 290 2913.
authors.forename: Eiji
authors.initials: E
authors.lastname: Kobatake
authors.affiliation: Temko Corporation, 4-27-4 Honcho, Nakano, Tokyo 164-0012 (Japan).
authors.forename: Takashi
authors.initials: T
authors.lastname: Koyano
authors.affiliation: Faculty of Agriculture, Kohn Kaen University, Kohn Kaen 40002 (Thailand).
authors.forename: Thaworn
authors.initials: T
authors.lastname: Kowithayakorn
authors.affiliation: Institute of Molecular and Cellular Biosciences, The University of Tokyo, Yayoi, Tokyo 113-0032 (Japan).
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Kato
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, Inage, Chiba 263-8522 (Japan), Fax: +81 43 290 2913.
authors.forename: Masami
authors.initials: M
authors.lastname: Ishibashi
mesh_terms: D001688:Biological Products / Q000737:chemistry / Q000302:isolation & purification*; D002846:Chromatography, Affinity / Q000379:methods*; D055767:Immobilized Proteins / Q000737:chemistry*; D008280:Magnetics / Q000379:methods*
chemical_list: D001688:Biological Products; D055767:Immobilized Proteins