title: High-performance affinity chromatography method for identification of L-arginine interacting factors using magnetic nanobeads.
abstract: L-Arginine exhibits a wide range of biological activities through a complex and highly regulated set of pathways that remain incompletely understood at both the whole-body and the cellular levels. The aim of this study is to develop and validate effective purification system for L-arginine interacting factors (AIFs). We have recently developed novel magnetic nanobeads (FG beads) composed of magnetite particles/glycidyl methacrylate (GMA)-styrene copolymer/covered GMA. These nanobeads have shown higher performance compared with commercially available magnetic beads in terms of purification efficiency. In this study, we have newly developed L-arginine methyl ester (L-AME)-immobilized beads by conjugating L-AME to the surface of these nanobeads. Firstly, we showed that inducible nitric oxide synthase, which binds and uses L-arginine as a substrate, specifically bound to L-AME-immobilized beads. Secondly, we newly identified phosphofructokinase, RuvB-like 1 and RuvB-like 2 as AIFs from crude extracts of HeLa cells using this affinity chromatographic system. The data presented here demonstrate that L-AME-immobilized beads are effective tool for purification of AIFs directly from crude cell extracts. We expect that the present method can be used to purify AIFs from various types of cells.
authors.affiliation: Department of Aging Intervention, National Institute for Longevity Sciences, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8522, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Hiramoto
authors.forename: Naoya
authors.initials: N
authors.lastname: Maekawa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kuge
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Ayabe
authors.forename: Atsushi
authors.initials: A
authors.lastname: Watanabe
authors.forename: Yuka
authors.initials: Y
authors.lastname: Masaike
authors.forename: Mamoru
authors.initials: M
authors.lastname: Hatakeyama
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Handa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Imai
mesh_terms: D001120:Arginine / Q000031:analogs & derivatives / Q000737:chemistry*; D002846:Chromatography, Affinity / Q000295:instrumentation / Q000379:methods*; D006367:HeLa Cells; D006801:Humans; D008280:Magnetics; D011485:Protein Binding; D011506:Proteins / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D011506:Proteins; D001120:Arginine