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    Ni2+-zeolite/ferrosphere and Ni2+-silica/ferrosphere beads for magnetic affinity separation of histidine-tagged proteins / T. A. Vereshchagina [et al.] // Dalton Trans. - 2016. - Vol. 45, Is. 4. - P1582-1592, DOI 10.1039/c5dt03827h . - ISSN 1477-9226
Кл.слова (ненормированные):
Alkalinity -- Amino acids -- Chemical modification -- Fly ash -- Hydrothermal synthesis -- Ion exchange -- Magnetic separation -- Magnetism -- Proteins -- Silica -- Zeolites -- Conventional methods -- Core shell structure -- Green fluorescent protein -- Histidine-tagged proteins -- Hydrothermal treatments -- Magnetic affinity -- Mesoporous Silica -- Sorption capacities -- Nickel
Аннотация: Magnetic Ni2+-zeolite/ferrosphere and Ni2+-silica/ferrosphere beads (Ni-ferrosphere beads - NFB) of a core-shell structure were synthesized starting from coal fly ash ferrospheres having diameters in the range of 0.063-0.050 mm. The strategy of NFB fabrication is an oriented chemical modification of the outer surface preserving the magnetic core of parent beads with the formation of micro-mesoporous coverings. Two routes of ferrosphere modification were realized, such as (i) hydrothermal treatment in an alkaline medium resulting in a NaP zeolite layer and (ii) synthesis of micro-mesoporous silica on the glass surface using conventional methods. Immobilization of Ni2+ ions in the siliceous porous shell of the magnetic beads was carried out via (i) the ion exchange of Na+ for Ni2+ in the zeolite layer or (ii) deposition of NiO clusters in the zeolite and silica pores. The final NFB were tested for affinity in magnetic separation of the histidine-tagged green fluorescent protein (GFP) directly from a cell lysate. Results pointed to the high affinity of the magnetic beads towards the protein in the presence of 10 mM EDTA. The sorption capacity of the ferrosphere-based Ni-beads with respect to GFP was in the range 1.5-5.7 mg cm-3. © The Royal Society of Chemistry.

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Держатели документа:
Institute of Chemistry and Chemical Technology SB RAS, 50/24 Akademgorodok, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vereshchagina, T. A.; Fedorchak, M. A.; Sharonova, O. M.; Fomenko, E. V.; Shishkina, N. N.; Zhizhaev, A. M.; Kudryavtsev, A. N.; Frank, L. A.; Anshits, A. G.

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