Shieh DB, Su CH, Chang FY, Wu YN, Su WC, Hwu JR, Chen JH, Yeh CS. Aqueous nickel-nitrilotriacetate modified Fe(3)O(4)-NH(3)(+) nanoparticles for protein purification and cell targeting.
NANOTECHNOLOGY 2006;
17:4174-4182. [PMID:
21727556 DOI:
10.1088/0957-4484/17/16/030]
[Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A comprehensive totally aqueous phase synthesis of nickel-nitrilotriacetate (Ni-NTA) modified superparamagnetic Fe(3)O(4) nanoparticles is presented. The Fe(3)O(4)-NTA-Ni nanoparticles are able to perform efficient and specific purification of 6-His tagged proteins from crude cell lysates, as evidenced by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot analysis. The average binding capacity, as demonstrated by streptopain (M(W) 42 kDa), is 0.23 mg/mg (protein/Fe(3)O(4)-NTA-Ni). Considering the high affinity and specificity of the binding between hexahistidine motif and Ni-NTA, Ni-NTA modified nanoparticles could act as a module to carry 6-His tagged proteins on the particle surface with molecular orientation control, since only the 6-His domain could be attached. These modularly designed functional nanoparticles enhance cancer cell targeting, as supported by the in vitro receptor mediated targeting assay using RGD-4C-6-His fusion peptide. The nanoparticles show no significant hemolysis for human blood and could be investigated further for their in vivo functional imaging applications.
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