6533b7d5fe1ef96bd126467f

RESEARCH PRODUCT

Multifunctional polymer-derivatized γ-Fe2O3 nanocrystals as a methodology for the biomagnetic separation of recombinant His-tagged proteins

Helen Annal ThereseVadim KsenofontovNadine MetzHeinz-christoph SchröderFilipe NatalioMugdha DivekarMuhammad Nawaz TahirWerner E.g. MüllerWolfgang TremelPatrick TheatoMohammed Ibrahim Shukoor

subject

chemistry.chemical_classificationGel electrophoresisMaterials scienceIron oxideNanoparticlePolymerCondensed Matter PhysicsElectronic Optical and Magnetic Materialschemistry.chemical_compoundNuclear magnetic resonancechemistryChemical engineeringProtein purificationMicroscopyHigh-resolution transmission electron microscopySuperparamagnetism

description

Abstract Multifunctional polymer-derivatized superparamagnetic iron oxide (γ-Fe2O3) nanoparticles were prepared for biomagnetic separation of histidine-tagged recombinant proteins building up a faster and efficient method for protein separation by making use of their intrinsic magnetic properties. Using polymer bound γ-Fe2O3 nanocrystals, a 6× histidine-tagged recombinant protein (silicatein) with a molecular weight of 24 kDa has been isolated and purified. The supermagnetic iron oxide nanocrystals were characterized by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), SQUID and Mossbauer and the polymer functionalization of the γ-Fe2O3 nanocrystals was monitored by UV–vis spectroscopy and light microscopy. Protein immobilization and separation was monitored using immunostaining techniques and gel electrophoresis, respectively.

https://doi.org/10.1016/j.jmmm.2008.04.160