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Default Multiplet-filtered and gradient-selected zero-quantum TROSY experiments for 13C1H3 methyl groups in proteins

Multiplet-filtered and gradient-selected zero-quantum TROSY experiments for 13C1H3 methyl groups in proteins


Abstract Multiplet-filtered and gradient-selected heteronuclear zero-quantum coherence (gsHZQC) TROSY experiments are described for measuring 1HÔ??13C correlations for 13CH3 methyl groups in proteins. These experiments provide improved suppression of undesirable, broad outer components of the heteronuclear zero-quantum multiplet in medium-sized proteins, or in flexible sites of larger proteins, compared to previously described HZQC sequences (Tugarinov et al. in J Am Chem Soc 126:4921Ô??4925, 2004; Ollerenshaw et al. in J Biomol NMR 33:25Ô??41, 2005). Hahn-echo versions of the gsHZQC experiment also are described for measuring zero- and double-quantum transverse relaxation rate constants for identification of chemical exchange broadening. Application of the proposed pulse sequences to Escherichia coli ribonuclease HI, with a molecular mass of 18 kD, indicates that improved multiplet suppression is obtained without substantial loss of sensitivity.
  • Content Type Journal Article
  • Category Article
  • Pages 1-7
  • DOI 10.1007/s10858-011-9533-1
  • Authors
    • Michelle L. Gill, Department of Biochemistry and Molecular Biophysics, Columbia University, 630 West 168th Street, New York, NY 10032, USA
    • Arthur G. Palmer, Department of Biochemistry and Molecular Biophysics, Columbia University, 630 West 168th Street, New York, NY 10032, USA

Source: Journal of Biomolecular NMR
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