A new polymer-stabilized nematic liquid crystal has been characterized for the measurement of biomolecular residual dipolar couplings. Filamentous Pf1 phage were embedded in a polyacrylamide matrix that fixes the orientation of the particles. The alignment was characterized by the quadrupolar splitting of the 2H NMR water signal and by the measurement of 1H-15N residual dipolar couplings (RDC) in the archeal translation elongation factor 1beta. Protein dissolved in the polymer-stabilized medium orients quantitatively as in media without polyacrylamide. We show that the quadrupolar splitting and RDCs are zero in media in which the Pf1 phage particles are aligned at the magic angle. This allows measurement of J and dipolar couplings in a single sample.
[NMR paper] Bicelle-based liquid crystals for NMR-measurement of dipolar couplings at acidic and
Bicelle-based liquid crystals for NMR-measurement of dipolar couplings at acidic and basic pH values.
Related Articles Bicelle-based liquid crystals for NMR-measurement of dipolar couplings at acidic and basic pH values.
J Biomol NMR. 1999 Feb;13(2):187-91
Authors: Ottiger M, Bax A
It is demonstrated that mixtures of ditetradecyl-phosphatidylcholine or didodecyl-phoshatidylcholine and dihexyl-phosphatidylcholine in water from lyotropic liquid crystalline phases under similar conditions as previously reported for bicelles consisting of...