Book chapter
Solid-state NMR spectroscopic analysis for structure determination of a zinc-bound catalytic amyloid fibril
Methods in Enzymology, pp 435-471
01 Jan 2024
PMID: 38816132
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Zinc ions are commonly involved in enzyme catalysis and protein structure stabilization, but their coordination geometry of zinc-protein complex is rarely determined. Here, in this chapter, we introduce a systematic solid-state NMR approach to determine the oligomeric assembly and Zn2+ coordination geometry of a de novo designed amyloid fibrils that catalyze zinc dependent ester hydrolysis. NMR chemical shifts and intermolecular contacts confirm that the peptide forms parallel-in-register beta-sheets, with the two forms of Zn2+ bound histidines in each peptide. The amphiphilic parallel beta-sheets assemble into stacked bilayers that are stabilized by hydrophobic side chains between beta-sheets. The conformations of the histidine side chains, determined by C-13-N-15 distance measurements, reveal how histidines protrude from the beta-sheet. H-1-N-15 correlation spectra show that the single-Zn2+ coordinated histidine associated with dynamic water. The resulting structure provides insight into how metal ions contribute to stabilizing the protein structure and driving its catalytic reactivity.
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Details
- Title
- Solid-state NMR spectroscopic analysis for structure determination of a zinc-bound catalytic amyloid fibril
- Creators
- Yoongyeong Baek - Drexel UniversityMyungwoon Lee - Drexel University
- Contributors
- Korendovych (Editor)
- Publication Details
- Methods in Enzymology, pp 435-471
- Series
- Methods in Enzymology
- Publisher
- Elsevier; SAN DIEGO
- Number of pages
- 37
- Grant note
- Department of Chemistry at Drexel University
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:001297377800017
- Scopus ID
- 2-s2.0-85185606574
- Other Identifier
- 991022202519904721
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InCites Highlights
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- Web of Science research areas
- Biochemical Research Methods
- Biochemistry & Molecular Biology