ArticleAnalytical biochemistry2022
Facile production of tagless membrane scaffold protein for nanodiscs.
Article in Analytical biochemistry, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The initial step in the preparation of nanodiscs is to express and purify the membrane scaffold protein (MSP) to homogeneity. Current methods used for the isolation and purification of MSP utilize nickel affinity chromatography. However, the presence of a polyhistidine tag on the MSP often interferes with downstream steps where nanodiscs reconstituted with protein need to be isolated from empty ones. Therefore, one must engage in the finicky process of removing the polyhistidine tag from the MSP using a protease before the formation of nanodiscs. Herein, we describe a robust streamlined approach to produce tagless MSP by expression as inclusion bodies followed by cleavage with cyanogen bromide, and purification by gel filtration chromatography. In addition, the MSP prepared is devoid of tryptophan residues which facilitates tryptophan-based spectroscopic studies of reconstituted proteins. Dynamic light scattering and transmission electron microscopy showed that the tagless MSP produced was competent to produce nanodiscs.
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