Volume 57, Issue 50 pp. 16375-16379
Communication

Fast Magic-Angle Spinning 19F NMR Spectroscopy of HIV-1 Capsid Protein Assemblies

Mingzhang Wang

Mingzhang Wang

Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, Newark, DE, 19716 USA

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

These authors contributed equally.

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Manman Lu

Manman Lu

Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, Newark, DE, 19716 USA

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

Department of Structural Biology, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

These authors contributed equally.

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Matthew P. Fritz

Matthew P. Fritz

Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, Newark, DE, 19716 USA

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

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Caitlin M. Quinn

Caitlin M. Quinn

Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, Newark, DE, 19716 USA

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In-Ja L. Byeon

In-Ja L. Byeon

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

Department of Structural Biology, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

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Chang-Hyeock Byeon

Chang-Hyeock Byeon

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

Department of Structural Biology, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

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Jochem Struppe

Jochem Struppe

Bruker Biospin Corporation, 15 Fortune Drive, Billerica, MA, USA

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Werner Maas

Werner Maas

Bruker Biospin Corporation, 15 Fortune Drive, Billerica, MA, USA

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Angela M. Gronenborn

Corresponding Author

Angela M. Gronenborn

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

Department of Structural Biology, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

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Tatyana Polenova

Corresponding Author

Tatyana Polenova

Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, Newark, DE, 19716 USA

Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Avenue, Pittsburgh, PA, 15261 USA

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First published: 17 September 2018
Citations: 57

Graphical Abstract

Think big: The structural characterization of large biological systems is a challenge by conventional techniques. Fast MAS 19F NMR spectroscopy was found to be an attractive means for investigating protein assemblies (see picture). In the investigation of HIV-1 capsid protein assemblies, high spectral resolution was attained in 19F–19F correlation spectra, permitting the detection of nanometer distances of the order of 20 Å.

Abstract

19F NMR spectroscopy is an attractive and growing area of research with broad applications in biochemistry, chemical biology, medicinal chemistry, and materials science. We have explored fast magic angle spinning (MAS) 19F solid-state NMR spectroscopy in assemblies of HIV-1 capsid protein. Tryptophan residues with fluorine substitution at the 5-position of the indole ring were used as the reporters. The 19F chemical shifts for the five tryptophan residues are distinct, reflecting differences in their local environment. Spin-diffusion and radio-frequency-driven-recoupling experiments were performed at MAS frequencies of 35 kHz and 40–60 kHz, respectively. Fast MAS frequencies of 40–60 kHz are essential for consistently establishing 19F–19F correlations, yielding interatomic distances of the order of 20 Å. Our results demonstrate the potential of fast MAS 19F NMR spectroscopy for structural analysis in large biological assemblies.

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