Journal of Biomolecular NMR

, Volume 20, Issue 1, pp 49–60 | Cite as

MUNIN: A new approach to multi-dimensional NMR spectra interpretation

  • Vladislav Yu. Orekhov
  • Ilghiz V. Ibraghimov
  • Martin Billeter


A new method, MUNIN (Multi-dimensional NMR spectra interpretation), is introduced for the automated interpretation of three-dimensional NMR spectra. It is based on a mathematical concept referred to as three-way decomposition. An NMR spectrum is decomposed into a sum of components, with each component corresponding to one or a group of peaks. Each component is defined as the direct product of three one-dimensional shapes. A consequence is reduction in dimensionality of the spectral data used in further analysis. The decomposition may be applied to frequency-domain or time-domain data, or to a mixture of these. Features of MUNIN include good resolution in crowded regions and the absence of assumptions about line shapes. Uniform sampling of time-domain data, a prerequisite for discrete Fourier transform, is not required. This opens an avenue for the processing of NMR data that do not follow oscillating behaviour, e.g. from relaxation measurements. The application of MUNIN is illustrated for a 1H-15N-NOESY-HSQC, where each component is defined as the set of all NOE peaks formed by a given amide group. As a result, the extraction of structural information simply consists of one-dimensional peak picking of the shape along the NOE-axis obtained for each amide group.

canonical decomposition 1H-15N-NOESY-HSQC non-uniform sampling PARAFAC parallel factor analysis signal processing three-way decomposition 


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© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Vladislav Yu. Orekhov
  • Ilghiz V. Ibraghimov
  • Martin Billeter

There are no affiliations available

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