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Asami S, Kallies W, Günther JC, Stavropoulou M, Glaser SJ, Sattler M. Ultrashort Broadband Cooperative Pulses for Multidimensional Biomolecular NMR Experiments. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sam Asami
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
| | - Wolfgang Kallies
- Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
| | - Johannes C. Günther
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
| | - Maria Stavropoulou
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
| | - Steffen J. Glaser
- Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
| | - Michael Sattler
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry; Technical University of Munich (TUM); Lichtenbergstr. 4 85747 Garching Germany
- Institute of Structural Biology; Helmholtz-Zentrum München; Ingolstädter Landstr. 1 85764 Neuherberg Germany
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Asami S, Kallies W, Günther JC, Stavropoulou M, Glaser SJ, Sattler M. Ultrashort Broadband Cooperative Pulses for Multidimensional Biomolecular NMR Experiments. Angew Chem Int Ed Engl 2018; 57:14498-14502. [PMID: 29508496 DOI: 10.1002/anie.201800220] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 02/16/2018] [Indexed: 12/20/2022]
Abstract
NMR spectroscopy at ultra-high magnetic fields requires improved radiofrequency (rf) pulses to cover the increased spectral bandwidth. Optimized 90° pulse pairs were introduced as Ramsey-type cooperative (Ram-COOP) pulses for biomolecular NMR applications. The Ram-COOP element provides broadband excitation with enhanced sensitivity and reduced artifacts even at magnetic fields >1.0 GHz 1 H Larmor frequency (23 T). A pair of 30 μs Ram-COOP pulses achieves an excitation bandwidth of 100 kHz with a maximum rf field of 20 kHz, more than three-fold improved compared to excitation by rectangular pulses. Ram-COOP pulses exhibit little offset-dependent phase errors and are robust to rf inhomogeneity. The performance of the Ram-COOP element is experimentally confirmed with heteronuclear multidimensional NMR experiments, applied to proteins and nucleic acids. Ram-COOP provides broadband excitation at low rf field strength suitable for application at current magnetic fields and beyond 23 T.
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Affiliation(s)
- Sam Asami
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany
| | - Wolfgang Kallies
- Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany
| | - Johannes C Günther
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany
| | - Maria Stavropoulou
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany
| | - Steffen J Glaser
- Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany
| | - Michael Sattler
- Center for Integrated Protein Science Munich (CIPSM) at Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstr. 4, 85747, Garching, Germany.,Institute of Structural Biology, Helmholtz-Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
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