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Nmr experiments for resonance assignments of c-13, n-15 doubly-labeled flexible polypeptides: Application to the human prion protein hprp(23-230)

Academic Article
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Overview

authors

  • Liu, A. Z.
  • Riek, R.
  • Wider, G.
  • von Schroetter, C.
  • Zahn, R.
  • Wuthrich, Kurt

publication date

  • February 2000

journal

  • Journal of Biomolecular NMR  Journal

abstract

  • A combination of three heteronuclear three-dimensional NMR experiments tailored for sequential resonance assignments in uniformly 15N, 13C-labeled flexible polypeptide chains is described. The 3D (H)N(CO-TOCSY)NH, 3D (H)CA(CO-TOCSY)NH and 3D (H)CBCA(CO-TOCSY)NH schemes make use of the favorable 15N chemical shift dispersion in unfolded polypeptides, exploit the slow transverse 15N relaxation rates of unfolded polypeptides in high resolution constant-time [1H, 15N]-correlation experiments, and use carbonyl carbon homonuclear isotropic mixing to transfer magnetization sequentially along the amino acid sequence. Practical applications are demonstrated with the 100-residue flexible tail of the recombinant human prion protein, making use of spectral resolution up to 0.6 Hz in the 15N dimension, simultaneous correlation with the two adjacent amino acid residues to overcome problems associated with spectral overlap, and the potential of the presently described experiments to establish nearest-neighbor correlations across proline residues in the amino acid sequence.

subject areas

  • Carbon Isotopes
  • Humans
  • Motion
  • Nitrogen Isotopes
  • Nuclear Magnetic Resonance, Biomolecular
  • Peptides
  • Prions
  • Proline
  • Protein Structure, Secondary
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Research

keywords

  • carbonyl carbon homonuclear isotropic mixing
  • flexible polypeptide chains
  • human prion protein
  • sequential NMR assignment
  • triple-resonance experiments
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Identity

International Standard Serial Number (ISSN)

  • 0925-2738

Digital Object Identifier (DOI)

  • 10.1023/a:1008305022907

PubMed ID

  • 10723992
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Additional Document Info

start page

  • 127

end page

  • 138

volume

  • 16

issue

  • 2

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