Sparsely-sampled, high-resolution 4-D omit spectra for detection and assignment of intermolecular NOEs of protein complexes.

Journal Article (Journal Article)

Unambiguous detection and assignment of intermolecular NOEs are essential for structure determination of protein complexes by NMR. Such information has traditionally been obtained with 3-D half-filtered experiments, where scalar coupling-based purging of intramolecular signals allows for selective detection of intermolecular NOEs. However, due to the large variation of (1)JHC scalar couplings and limited chemical shift dispersion in the indirect proton dimension, it is difficult to obtain reliable and complete assignments of interfacial NOEs. Here, we demonstrate a strategy that combines selective labeling and high-resolution 4-D NOE spectroscopy with sparse sampling for reliable identification and assignment of intermolecular NOEs. Spectral subtraction of component-labeled complexes from a uniformly-labeled protein complex yields an "omit" spectrum containing positive intermolecular NOEs with little signal degeneracy. Such a strategy can be broadly applied to unbiased detection, assignment and presentation of intermolecular NOEs of protein complexes.

Full Text

Duke Authors

Cited Authors

  • Wang, S; Zhou, P

Published Date

  • June 2014

Published In

Volume / Issue

  • 59 / 2

Start / End Page

  • 51 - 56

PubMed ID

  • 24789524

Pubmed Central ID

  • PMC4134939

Electronic International Standard Serial Number (EISSN)

  • 1573-5001

Digital Object Identifier (DOI)

  • 10.1007/s10858-014-9834-2


  • eng

Conference Location

  • Netherlands