Covalently circularized nanodiscs for studying membrane proteins and viral entry.

Nasr, Mahmoud L; Baptista, Diego; Strauss, Mike; Sun, Zhen-Yu J; Grigoriu, Simina; Huser, Sonja; Plückthun, Andreas; Hagn, Franz et al. · Nat Methods · 2017

basic_science · Level V

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Abstract

We engineered covalently circularized nanodiscs (cNDs) which, compared with standard nanodiscs, exhibit enhanced stability, defined diameter sizes and tunable shapes. Reconstitution into cNDs enhanced the quality of nuclear magnetic resonance spectra for both VDAC-1, a β-barrel membrane protein, and the G-protein-coupled receptor NTR1, an α-helical membrane protein. In addition, we used cNDs to visualize how simple, nonenveloped viruses translocate their genomes across membranes to initiate infection.

Medical subject headings