alexa Rigid, specific, and discrete gold nanoparticle antibody conjugates.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Ackerson CJ, Jadzinsky PD, Jensen GJ, Kornberg RD

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Abstract A general method of rigid, specific labeling of proteins with gold clusters has been devised. The method relies on the conjugation of a glutathione monolayer-protected gold cluster (MPC) with a single chain Fv antibody fragment (scFv), mutated to present an exposed cysteine residue. Efficient formation of a gold-thiolate bond between the MPC and scFv depends on activation of the gold cluster by chemical oxidation. Once formed, the MPC-scFv conjugate is treated with a reductant to quench cluster reactivity. The procedure has been performed with an MPC with an average Au(71) core and an scFv directed against a tetrameric protein, the influenza neuraminidase. A complex of the MPC-scFv conjugate with the neuraminidase was isolated, and the presence of four gold clusters was verified by cryoelectron microscopy. This article was published in J Am Chem Soc and referenced in Journal of Nanomedicine & Nanotechnology

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