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

Abstract

F 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) F 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 F 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 F- F correlations, yielding interatomic distances of the order of 20 Å. Our results demonstrate the potential of fast MAS F NMR spectroscopy for structural analysis in large biological assemblies.

Design Parameters of Tissue‐Engineering Scaffolds at the Atomic Scale

“…In this regard, the future challenge is to characterize tissue-engineering scaffolds in the presence of stem cells at the atomic-length scale.H ere,s sNMR, in combination with advanced detection, enhancement, and sample preparation schemes for complex cellular samples such as dynamics nuclear polarization, [52,58,60] ultrafast MAS, [28] and 19 F-labelling [61,62] could be an ideal tool to enhance our knowledge on interactions between stem cells and their substrates at physiological conditions,and to generally improve our understanding of the composition of bone and tissue materials.…”

Design Parameters of Tissue‐Engineering Scaffolds at the Atomic Scale

“…In this regard, the future challenge is to characterize tissue‐engineering scaffolds in the presence of stem cells at the atomic‐length scale. Here, ssNMR, in combination with advanced detection, enhancement, and sample preparation schemes for complex cellular samples such as dynamics nuclear polarization, ultrafast MAS, and 19 F‐labelling could be an ideal tool to enhance our knowledge on interactions between stem cells and their substrates at physiological conditions, and to generally improve our understanding of the composition of bone and tissue materials.…”

Preise der American Chemical Society 2020

“…Gronenborn entwickelt NMR‐Methoden für die Untersuchung der Struktur und Dynamik biologischer Makromoleküle. In einer Angewandte‐Chemie ‐Zuschrift stellte sie eine 19 F‐NMR‐Studie von HIV‐1‐Kapsidprotein‐Aggregaten vor . Gronenborn ist Associate Editor des FEBS Journal und Mitglied des Redaktionsbeirats von Proteins .…”