Bifunctional nickel-iminodiacetic acid-core-shell silica nanoparticles for the exclusion of high molecular weight proteins and purification of His-tagged recombinant proteins.
RSC Adv
; 9(20): 11038-11045, 2019 Apr 09.
Article
en En
| MEDLINE
| ID: mdl-35520222
Herein, silica nanoparticles were synthesized and chemically modified with iminodiacetic acid (IDA) and Ni2+ ions surrounded by a bis-acrylamide polymeric shell to obtain a new core-shell immobilized metal affinity chromatography (IMAC) based material. These Ni2+-IDA-core-shell silica nanoparticles (Ni2+-IDA-CSS-NP) represent a new alternative for purification of His-tagged proteins and exclusion of high molecular weight (HMW) proteins at the same time. Nanoparticles presented a final size of 479.6 ± 6.9 nm determined by dynamic light scattering (DLS) and a surface charge of -37.2 ± 0.5 mV. Successful incorporation of the different compounds at every phase of synthesis was evidenced by ATR-FTIR analysis. Ni2+-IDA-CSS-NP were used for isolation of His-tagged spo0F (6His-spo0F) from E. coli lysate. Ni2+-IDA-CSS-NP presented a capacity of 4.16 ± 0.45 µg mg-1. Purification of 6His-spo0F with high selectivity and the effective exclusion of HMW proteins were evidenced by SDS-PAGE and validated through mass spectrometry analysis.
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Colección:
01-internacional
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MEDLINE
Idioma:
En
Revista:
RSC Adv
Año:
2019
Tipo del documento:
Article
Pais de publicación:
Reino Unido