Abstract:
:Simple pulse schemes are presented for the measurement of methyl (13)C and (1)H CSA values from (1)H-(13)C dipole/(13)C CSA and (1)H-(13)C dipole/(1)H CSA cross-correlated relaxation. The methodology is applied to protein L and malate synthase G. Average (13)C CSA values are considerably smaller for Ile than Leu/Val (17 vs 25 ppm) and are in good agreement with previous solid state NMR studies of powders of amino acids and dipeptides and in reasonable agreement with quantum-chemical DFT calculations of methyl carbon CSA values in peptide fragments. Small averaged (1)H CSA values on the order of 1 ppm are measured, consistent with a solid state NMR determination of the methyl group (1)H CSA in dimethylmalonic acid.
journal_name
J Biomol NMRjournal_title
Journal of biomolecular NMRauthors
Tugarinov V,Scheurer C,Brüschweiler R,Kay LEdoi
10.1007/s10858-004-4349-xsubject
Has Abstractpub_date
2004-12-01 00:00:00pages
397-406issue
4eissn
0925-2738issn
1573-5001journal_volume
30pub_type
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