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Medeiros-Silva J, Mance D, Daniëls M, Jekhmane S, Houben K, Baldus M, Weingarth M. 1 H-Detected Solid-State NMR Studies of Water-Inaccessible Proteins In Vitro and In Situ. Angew Chem Int Ed Engl 2016; 55:13606-13610. [PMID: 27671832 PMCID: PMC5113794 DOI: 10.1002/anie.201606594] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/04/2016] [Indexed: 11/08/2022]
Abstract
1 H detection can significantly improve solid-state NMR spectral sensitivity and thereby allows studying more complex proteins. However, the common prerequisite for 1 H detection is the introduction of exchangeable protons in otherwise deuterated proteins, which has thus far significantly hampered studies of partly water-inaccessible proteins, such as membrane proteins. Herein, we present an approach that enables high-resolution 1 H-detected solid-state NMR (ssNMR) studies of water-inaccessible proteins, and that even works in highly complex environments such as cellular surfaces. In particular, the method was applied to study the K+ channel KcsA in liposomes and in situ in native bacterial cell membranes. We used our data for a dynamic analysis, and we show that the selectivity filter, which is responsible for ion conduction and highly conserved in K+ channels, undergoes pronounced molecular motion. We expect this approach to open new avenues for biomolecular ssNMR.
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Affiliation(s)
- João Medeiros-Silva
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Deni Mance
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Mark Daniëls
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Shehrazade Jekhmane
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Klaartje Houben
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Marc Baldus
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Markus Weingarth
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Utrecht University, Pandualaan 8, 3584 CH, Utrecht, The Netherlands.
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Medeiros-Silva J, Mance D, Daniëls M, Jekhmane S, Houben K, Baldus M, Weingarth M. 1
H-detektierte Festkörper-NMR-Studien wasserunzugänglicher Proteine in vitro und in situ. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- João Medeiros-Silva
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Deni Mance
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Mark Daniëls
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Shehrazade Jekhmane
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Klaartje Houben
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Marc Baldus
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
| | - Markus Weingarth
- NMR Spectroscopy; Bijvoet Center for Biomolecular Research; Department of Chemistry; Utrecht University; Pandualaan 8 3584 CH Utrecht Niederlande
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