1
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Goldberga I, Hung I, Sarou-Kanian V, Gervais C, Gan Z, Novák-Špačková J, Métro TX, Leroy C, Berthomieu D, van der Lee A, Bonhomme C, Laurencin D. High-Resolution 17O Solid-State NMR as a Unique Probe for Investigating Oxalate Binding Modes in Materials: The Case Study of Calcium Oxalate Biominerals. Inorg Chem 2024; 63:10179-10193. [PMID: 38729620 DOI: 10.1021/acs.inorgchem.4c00300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
Oxalate ligands are found in many classes of materials, including energy storage materials and biominerals. Determining their local environments at the atomic scale is thus paramount to establishing the structure and properties of numerous phases. Here, we show that high-resolution 17O solid-state NMR is a valuable asset for investigating the structure of crystalline oxalate systems. First, an efficient 17O-enrichment procedure of oxalate ligands is demonstrated using mechanochemistry. Then, 17O-enriched oxalates were used for the synthesis of the biologically relevant calcium oxalate monohydrate (COM) phase, enabling the analysis of its structure and heat-induced phase transitions by high-resolution 17O NMR. Studies of the low-temperature COM form (LT-COM), using magnetic fields from 9.4 to 35.2 T, as well as 13C-17O MQ/D-RINEPT and 17O{1H} MQ/REDOR experiments, enabled the 8 inequivalent oxygen sites of the oxalates to be resolved, and tentatively assigned. The structural changes upon heat treatment of COM were also followed by high-resolution 17O NMR, providing new insight into the structures of the high-temperature form (HT-COM) and anhydrous calcium oxalate α-phase (α-COA), including the presence of structural disorder in the latter case. Overall, this work highlights the ease associated with 17O-enrichment of oxalate oxygens, and how it enables high-resolution solid-state NMR, for "NMR crystallography" investigations.
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Affiliation(s)
- Ieva Goldberga
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Ivan Hung
- National High Magnetic Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | | | | | - Zhehong Gan
- National High Magnetic Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | | | | | - César Leroy
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
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2
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Schönzart J, Han R, Gennett T, Rienstra CM, Stringer JA. Magnetic Susceptibility Modeling of Magic-Angle Spinning Modules for Part Per Billion Scale Field Homogeneity. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2024; 364:107704. [PMID: 38879926 DOI: 10.1016/j.jmr.2024.107704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/17/2024] [Accepted: 05/18/2024] [Indexed: 06/18/2024]
Abstract
Magic-angle spinning (MAS) solid-state NMR methods are crucial in many areas of biology and materials science. Conventional probe designs have often been specified with 0.1 part per million (ppm) or 100 part per billion (ppb) magnetic field resolution, which is a limitation for many modern scientific applications. Here we describe a novel 5-mm MAS module design that significantly improves the linewidth and line shape for solid samples by an improved understanding of the magnetic susceptibility of probe materials and geometrical symmetry considerations, optimized to minimize the overall perturbation to the applied magnetic field (B0). The improved spinning module requires only first and second order shimming adjustments to achieve a sub-Hz resolution of 13C resonances of adamantane at 150 MHz Larmor frequency (14.1Tesla magnetic field). Minimal use of third and higher order shims improves experimental reproducibility upon sample changes and the exact placement within the magnet. Furthermore, the shimming procedure is faster, and the required gradients smaller, thus minimizing thermal drift of the room temperature (RT) shims. We demonstrate these results with direct polarization (Bloch decay) and cross polarization experiments on adamantane over a range of sample geometries and with multiple superconducting magnet systems. For a direct polarization experiment utilizing the entire active sample volume of a 5-mm rotor (90 µl), we achieved full width at half maximum (FWHM) of 0.76 Hz (5 ppb) and baseline resolved the 13C satellite peaks for adamantane as a consequent of the 7.31 Hz (59 ppb) width at 2% intensity. We expect these approaches to be increasingly pivotal for high-resolution solid-state NMR spectroscopy at and above 1 GHz 1H frequencies.
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Affiliation(s)
- Jasmin Schönzart
- Department of Chemistry, Colorado School of Mines, Golden, CO 80501, USA; PhoenixNMR, LLC, Loveland, CO 80503, USA.
| | - Ruixian Han
- Department of Chemistry, University of Wisconsin -Madison, Madison, WI 53706, USA
| | - Thomas Gennett
- Department of Chemistry, Colorado School of Mines, Golden, CO 80501, USA
| | - Chad M Rienstra
- Department of Chemistry, University of Wisconsin -Madison, Madison, WI 53706, USA; Department of Biochemistry, University of Wisconsin -Madison, Madison, WI 53706, USA; National Magnetic Resonance Facility at Madison, University of Wisconsin - Madison Madison, WI 53706, USA
| | - John A Stringer
- Department of Chemistry, Colorado School of Mines, Golden, CO 80501, USA; PhoenixNMR, LLC, Loveland, CO 80503, USA.
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3
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Dhavale DD, Barclay AM, Borcik CG, Basore K, Berthold DA, Gordon IR, Liu J, Milchberg MH, O'Shea JY, Rau MJ, Smith Z, Sen S, Summers B, Smith J, Warmuth OA, Perrin RJ, Perlmutter JS, Chen Q, Fitzpatrick JAJ, Schwieters CD, Tajkhorshid E, Rienstra CM, Kotzbauer PT. Structure of alpha-synuclein fibrils derived from human Lewy body dementia tissue. Nat Commun 2024; 15:2750. [PMID: 38553463 PMCID: PMC10980826 DOI: 10.1038/s41467-024-46832-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/12/2024] [Indexed: 04/02/2024] Open
Abstract
The defining feature of Parkinson disease (PD) and Lewy body dementia (LBD) is the accumulation of alpha-synuclein (Asyn) fibrils in Lewy bodies and Lewy neurites. Here we develop and validate a method to amplify Asyn fibrils extracted from LBD postmortem tissue samples and use solid state nuclear magnetic resonance (SSNMR) studies to determine atomic resolution structure. Amplified LBD Asyn fibrils comprise a mixture of single protofilament and two protofilament fibrils with very low twist. The protofilament fold is highly similar to the fold determined by a recent cryo-electron microscopy study for a minority population of twisted single protofilament fibrils extracted from LBD tissue. These results expand the structural characterization of LBD Asyn fibrils and approaches for studying disease mechanisms, imaging agents and therapeutics targeting Asyn.
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Affiliation(s)
- Dhruva D Dhavale
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Alexander M Barclay
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Collin G Borcik
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Katherine Basore
- Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Deborah A Berthold
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Isabelle R Gordon
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jialu Liu
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Moses H Milchberg
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jennifer Y O'Shea
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Michael J Rau
- Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Zachary Smith
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Soumyo Sen
- Theoretical and Computational Biophysics Group, NIH Resource for Macromolecular Modeling and Visualization, Beckman Institute for Advanced Science and Technology, Department of Biochemistry, and Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Brock Summers
- Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - John Smith
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Owen A Warmuth
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Richard J Perrin
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Joel S Perlmutter
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Radiology, Neuroscience, Physical Therapy and Occupational Therapy, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - James A J Fitzpatrick
- Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Charles D Schwieters
- Computational Biomolecular Magnetic Resonance Core, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Emad Tajkhorshid
- Theoretical and Computational Biophysics Group, NIH Resource for Macromolecular Modeling and Visualization, Beckman Institute for Advanced Science and Technology, Department of Biochemistry, and Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Chad M Rienstra
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- Morgridge Institute for Research, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, WI, 53706, USA.
| | - Paul T Kotzbauer
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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4
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Qiang W, Kengwerere M, Zhao W, Scott FJ, Wutoh-Hughes X, Wang T, Mentink-Vigier F. Heterotypic Interactions between the 40- and 42-Residue Isoforms of β-Amyloid Peptides on Lipid Bilayer Surfaces. ACS Chem Neurosci 2023; 14:4153-4162. [PMID: 37991929 PMCID: PMC10867818 DOI: 10.1021/acschemneuro.3c00523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023] Open
Abstract
Co-aggregation involving different amyloidogenic sequences has been emphasized recently in the modified amyloid cascade hypothesis. Yet, molecular-level interactions between two predominant β-amyloid peptide sequences, Aβ40 and Aβ42, in the fibrillation process in membrane-mimicked environments remain unclear. Here, we report biophysical evidence that demonstrates the molecular-level interactions between Aβ40 and Aβ42 at the membrane-associated conucleation stage using dynamic nuclear polarization-enhanced solid-state NMR spectroscopy. These residue-specific contacts are distinguished from those reported in mature fibrils formed by either Aβ40 or Aβ42. Meanwhile, site-specific interactions between Aβ and lipid molecules and modulation of microsecond-time-scale lipid dynamics are observed, which may be responsible for the more rapid and significant membrane content leakage compared to that with Aβ40 alone.
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Affiliation(s)
- Wei Qiang
- Department of Chemistry, Binghamton University, State University of New York, Binghamton, NY 13902, USA
| | - Maurine Kengwerere
- Department of Chemistry, Binghamton University, State University of New York, Binghamton, NY 13902, USA
| | - Wancheng Zhao
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Faith J. Scott
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Xyomara Wutoh-Hughes
- Department of Chemistry, Binghamton University, State University of New York, Binghamton, NY 13902, USA
| | - Tuo Wang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Frederic Mentink-Vigier
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
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5
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Barclay AM, Dhavale DD, Borcik CG, Milchberg MH, Kotzbauer PT, Rienstra CM. 13C and 15N resonance assignments of alpha synuclein fibrils amplified from Lewy Body Dementia tissue. BIOMOLECULAR NMR ASSIGNMENTS 2023; 17:281-286. [PMID: 37919529 PMCID: PMC10863844 DOI: 10.1007/s12104-023-10156-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 10/03/2023] [Indexed: 11/04/2023]
Abstract
Fibrils of the protein α-synuclein (Asyn) are implicated in the pathogenesis of Parkinson Disease, Lewy Body Dementia, and Multiple System Atrophy. Numerous forms of Asyn fibrils have been studied by solid-state NMR and resonance assignments have been reported. Here, we report a new set of 13C, 15N assignments that are unique to fibrils obtained by amplification from postmortem brain tissue of a patient diagnosed with Lewy Body Dementia.
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Affiliation(s)
- Alexander M Barclay
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Dhruva D Dhavale
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Collin G Borcik
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
- National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Moses H Milchberg
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Graduate Program in Biophysics, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Paul T Kotzbauer
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Chad M Rienstra
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- Graduate Program in Biophysics, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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6
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Perodeau J, Arbogast LW, Nieuwkoop AJ. Solid-State NMR Characterization of Lyophilized Formulations of Monoclonal Antibody Therapeutics. Mol Pharm 2023; 20:1480-1489. [PMID: 36702622 DOI: 10.1021/acs.molpharmaceut.2c00676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Monoclonal antibodies (mAbs) are an important and growing class of biotherapeutic drugs. Method development for the characterization of critical quality attributes, including higher-order structure (HOS), of mAbs remains an area of active inquiry. Recently, solution-state nuclear magnetic resonance (NMR) spectroscopy has received increased attention and is a means for reliable, high-resolution HOS characterization of aqueous-based preparations of mAbs. While mAbs are predominantly formulated in solution, up to 20% are prepared as solid amorphous powders and techniques for the robust characterization of HOS in the solid state remain limited. We propose here the use of solid-state NMR (ssNMR) fingerprinting to inform directly on the HOS of solid preparations of mAbs. Using lyophilized samples of the NISTmAb reference material prepared with different formulation conditions, we demonstrate that 1H-13C cross-polarization (hC-CP) buildup spectral series at natural isotopic abundance mAb samples are sensitive to differences in formulation. We also demonstrate that principal component analysis (PCA) can be used to differentiate the samples from one another in a user-independent manner while also highlighting areas where expert analysis can provide structural details about important molecular interactions in solid-phase protein formulations. Results from this study contribute to establishing the foundation for the use of ssNMR for HOS characterization of solid-phase biotherapeutics.
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Affiliation(s)
- Jacqueline Perodeau
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey08854, United States
| | - Luke W Arbogast
- Institute for Bioscience and Biotechnology Research, National Institute of Standards and Technology, Rockville, Maryland20850, United States
| | - Andrew J Nieuwkoop
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey08854, United States
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7
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Barclay AM, Dhavale DD, Borcik CG, Milchberg MH, Kotzbauer PT, Rienstra CM. 13C and 15N Resonance Assignments of Alpha Synuclein Fibrils Amplified from Lewy Body Dementia Tissue. RESEARCH SQUARE 2023:rs.3.rs-2460685. [PMID: 36865115 PMCID: PMC9980205 DOI: 10.21203/rs.3.rs-2460685/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Fibrils of the protein α-synuclein (Asyn) are implicated in the pathogenesis of Parkinson Disease, Lewy Body Dementia, and Multiple System Atrophy. Numerous forms of Asyn fibrils have been studied by solid-state NMR and resonance assignments have been reported. Here, we report a new set of 13C, 15N assignments that are unique to fibrils obtained by amplification from postmortem brain tissue of a patient diagnosed with Lewy Body Dementia.
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8
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An EPR Study on Highly Stable Nitroxyl-Nitroxyl Biradicals for Dynamic Nuclear Polarization Applications at High Magnetic Fields. Molecules 2023; 28:molecules28041926. [PMID: 36838912 PMCID: PMC9958542 DOI: 10.3390/molecules28041926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Nitroxide biradicals are efficient polarizing agents in dynamic nuclear polarization (DNP) solid-state nuclear magnetic resonance. Many recently reported radicals possess substantial DNP efficiency in organic solvents but have poor solubility in water media which is unfavorable for biological applications. In this paper, we report DNP efficiency at a high magnetic field for two water-soluble biradicals resistant to reducing media. Water solubility was achieved by obtaining the radicals in the form of quaternary ammonium salts. Parameters of hyperfine interaction and exchange interaction were quantified by EPR spectroscopy, and their influence on the DNP effect was determined. The resistance of the biradicals to strongly reducing media was characterized. High stability was achieved using tetraethyl substituents and pyrrolidine moieties.
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9
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Dhavale DD, Barclay AM, Borcik CG, Basore K, Gordon IR, Liu J, Milchberg MH, O’shea J, Rau MJ, Smith Z, Sen S, Summers B, Smith J, Warmuth OA, Chen Q, Fitzpatrick JAJ, Schwieters CD, Tajkhorshid E, Rienstra CM, Kotzbauer PT. Structure of alpha-synuclein fibrils derived from human Lewy body dementia tissue. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.09.523303. [PMID: 36711931 PMCID: PMC9882085 DOI: 10.1101/2023.01.09.523303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The defining feature of Parkinson disease (PD) and Lewy body dementia (LBD) is the accumulation of alpha-synuclein (Asyn) fibrils in Lewy bodies and Lewy neurites. We developed and validated a novel method to amplify Asyn fibrils extracted from LBD postmortem tissue samples and used solid state nuclear magnetic resonance (SSNMR) studies to determine atomic resolution structure. Amplified LBD Asyn fibrils comprise two protofilaments with pseudo-21 helical screw symmetry, very low twist and an interface formed by antiparallel beta strands of residues 85-93. The fold is highly similar to the fold determined by a recent cryo-electron microscopy study for a minority population of twisted single protofilament fibrils extracted from LBD tissue. These results expand the structural landscape of LBD Asyn fibrils and inform further studies of disease mechanisms, imaging agents and therapeutics targeting Asyn.
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Affiliation(s)
- Dhruva D. Dhavale
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Alexander M. Barclay
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Collin G. Borcik
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Katherine Basore
- Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Isabelle R. Gordon
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jialu Liu
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Moses H. Milchberg
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Jennifer O’shea
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael J. Rau
- Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Zachary Smith
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Soumyo Sen
- Theoretical and Computational Biophysics Group, NIH Resource for Macromolecular Modeling and Visualization, Beckman Institute for Advanced Science and Technology, Department of Biochemistry, and Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Brock Summers
- Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - John Smith
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, IL 61801, USA
| | - Owen A. Warmuth
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, IL 61801, USA
| | - James A. J. Fitzpatrick
- Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Charles D. Schwieters
- Computational Biomolecular Magnetic Resonance Core, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Emad Tajkhorshid
- Theoretical and Computational Biophysics Group, NIH Resource for Macromolecular Modeling and Visualization, Beckman Institute for Advanced Science and Technology, Department of Biochemistry, and Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Chad M. Rienstra
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
- Morgridge Institute for Research, University of Wisconsin-Madison, Madison, WI 53706 USA
- National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Paul T. Kotzbauer
- Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
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10
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Goldberga I, Jensen ND, Combes C, Mentink-Vigier F, Wang X, Hung I, Gan Z, Trébosc J, Métro TX, Bonhomme C, Gervais C, Laurencin D. 17O solid state NMR as a valuable tool for deciphering reaction mechanisms in mechanochemistry: the case study on the 17O-enrichment of hydrated Ca-pyrophosphate biominerals. Faraday Discuss 2023; 241:250-265. [PMID: 36134444 PMCID: PMC9813801 DOI: 10.1039/d2fd00127f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The possibility of enriching in 17O the water molecules within hydrated biominerals belonging to the Ca-pyrophosphate family was investigated, using liquid assisted grinding (LAG) in the presence of 17O-labelled water. Two phases with different hydration levels, namely triclinic calcium pyrophosphate dihydrate (Ca2P2O7·2H2O, denoted t-CPPD) and monoclinic calcium pyrophosphate tetrahydrate (Ca2P2O7·4H2O, denoted m-CPPT β) were enriched in 17O using a "post-enrichment" strategy, in which the non-labelled precursors were ground under gentle milling conditions in the presence of stoichiometric quantities of 17O-enriched water (introduced here in very small volumes ∼10 μL). Using high-resolution 17O solid-state NMR (ssNMR) analyses at multiple magnetic fields, and dynamic nuclear polarisation (DNP)-enhanced 17O NMR, it was possible to show that the labelled water molecules are mainly located at the core of the crystal structures, but that they can enter the lattice in different ways, namely by dissolution/recrystallisation or by diffusion. Overall, this work sheds light on the importance of high-resolution 17O NMR to help decipher the different roles that water can play as a liquid-assisted grinding agent and as a reagent for 17O-isotopic enrichment.
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Affiliation(s)
- Ieva Goldberga
- ICGM, Université de Montpellier, CNRS, ENSCMMontpellierFrance
| | | | - Christèle Combes
- CIRIMAT, Université de Toulouse, CNRS, Toulouse INP – ENSIACETToulouseFrance
| | | | - Xiaoling Wang
- National High Magnetic Field Laboratory (NHMFL)TallahasseeFloridaUSA
| | - Ivan Hung
- National High Magnetic Field Laboratory (NHMFL)TallahasseeFloridaUSA
| | - Zhehong Gan
- National High Magnetic Field Laboratory (NHMFL)TallahasseeFloridaUSA
| | - Julien Trébosc
- Université de Lille, CNRS, INRAE, Centrale Lille, Université d'Artois FR2638 – IMEC – Institut Michel Eugène Chevreul59000 LilleFrance
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11
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Goldberga I, Patris N, Chen CH, Thomassot E, Trébosc J, Hung I, Gan Z, Berthomieu D, Métro TX, Bonhomme C, Gervais C, Laurencin D. First Direct Insight into the Local Environment and Dynamics of Water Molecules in the Whewellite Mineral Phase: Mechanochemical Isotopic Enrichment and High-Resolution 17O and 2H NMR Analyses. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:12044-12059. [PMID: 35928237 PMCID: PMC9340807 DOI: 10.1021/acs.jpcc.2c02070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Calcium oxalate minerals of the general formula CaC2O4 . xH2O are widely present in nature and usually associated with pathological calcifications, constituting up to 70-80% of the mineral component of renal calculi. The monohydrate phase (CaC2O4 .H2O, COM) is the most stable form, accounting for the majority of the hydrated calcium oxalates found. These mineral phases have been studied extensively via X-ray diffraction and IR spectroscopy and, to a lesser extent, using 1H, 13C, and 43Ca solid-state NMR spectroscopy. However, several aspects of their structure and reactivity are still unclear, such as the evolution from low- to high-temperature COM structures (LT-COM and HT-COM, respectively) and the involvement of water molecules in this phase transition. Here, we report for the first time a 17O and 2H solid-state NMR investigation of the local structure and dynamics of water in the COM phase. A new procedure for the selective 17O- and 2H-isotopic enrichment of water molecules within the COM mineral is presented using mechanochemistry, which employs only microliter quantities of enriched water and leads to exchange yields up to ∼30%. 17O NMR allows both crystallographically inequivalent water molecules in the LT-COM structure to be resolved, while 2H NMR studies provide unambiguous evidence that these water molecules are undergoing different types of motions at high temperatures without exchanging with one another. Dynamics appear to be essential for water molecules in these structures, which have not been accounted for in previous structural studies on the HT-COM structure due to lack of available tools, highlighting the importance of such NMR investigations for refining the overall knowledge on biologically relevant minerals like calcium oxalates.
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Affiliation(s)
- Ieva Goldberga
- ICGM,
Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Nicolas Patris
- HydroSciences
Montpellier, UMR 5151, CNRS, IRD, Université
de Montpellier, 34090 Montpellier, France
| | - Chia-Hsin Chen
- ICGM,
Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Emilie Thomassot
- Université
de Lorraine, CRPG, CNRS UMR 7358, 54500 Vandœuvre-lès-Nancy, France
| | - Julien Trébosc
- Université
de Lille, CNRS, INRAE, Centrale Lille, Université d’Artois
FR2638−IMEC−Institut Michel Eugène Chevreul, 59000 Lille, France
| | - Ivan Hung
- National
High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | - Zhehong Gan
- National
High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, United States
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12
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Asanbaeva NB, Gurskaya LY, Polienko YF, Rybalova TV, Kazantsev MS, Dmitriev AA, Gritsan NP, Haro-Mares N, Gutmann T, Buntkowsky G, Tretyakov EV, Bagryanskaya EG. Effects of Spiro-Cyclohexane Substitution of Nitroxyl Biradicals on Dynamic Nuclear Polarization. Molecules 2022; 27:3252. [PMID: 35630726 PMCID: PMC9143461 DOI: 10.3390/molecules27103252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 11/20/2022] Open
Abstract
Spiro-substituted nitroxyl biradicals are widely used as reagents for dynamic nuclear polarization (DNP), which is especially important for biopolymer research. The main criterion for their applicability as polarizing agents is the value of the spin-spin exchange interaction parameter (J), which can vary considerably when different couplers are employed that link the radical moieties. This paper describes a study on biradicals, with a ferrocene-1,1'-diyl-substituted 1,3-diazetidine-2,4-diimine coupler, that have never been used before as DNP agents. We observed a substantial difference in the temperature dependence between Electron Paramagnetic Resonance (EPR) spectra of biradicals carrying either methyl or spirocyclohexane substituents and explain the difference using Density Functional Theory (DFT) calculation results. It was shown that the replacement of methyl groups by spirocycles near the N-O group leads to an increase in the contribution of conformers having J ≈ 0. The DNP gain observed for the biradicals with methyl substituents is three times higher than that for the spiro-substituted nitroxyl biradicals and is inversely proportional to the contribution of biradicals manifesting the negligible exchange interaction. The effects of nucleophiles and substituents in the nitroxide biradicals on the ring-opening reaction of 1,3-diazetidine and the influence of the ring opening on the exchange interaction were also investigated. It was found that in contrast to the methyl-substituted nitroxide biradical (where we observed the ring-opening reaction upon the addition of amines), the ring opening does not occur in the spiro-substituted biradical owing to a steric barrier created by the bulky cyclohexyl substituents.
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Affiliation(s)
- Nargiz B. Asanbaeva
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
| | - Larisa Yu. Gurskaya
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
| | - Yuliya F. Polienko
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
| | - Tatyana V. Rybalova
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
| | - Maxim S. Kazantsev
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
| | - Alexey A. Dmitriev
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, SB RAS, 3 Institutskaya Str., Novosibirsk 630090, Russia; (A.A.D.); (N.P.G.)
| | - Nina P. Gritsan
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, SB RAS, 3 Institutskaya Str., Novosibirsk 630090, Russia; (A.A.D.); (N.P.G.)
| | - Nadia Haro-Mares
- TU Darmstadt, Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany; (N.H.-M.); (T.G.); (G.B.)
| | - Torsten Gutmann
- TU Darmstadt, Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany; (N.H.-M.); (T.G.); (G.B.)
| | - Gerd Buntkowsky
- TU Darmstadt, Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany; (N.H.-M.); (T.G.); (G.B.)
| | - Evgeny V. Tretyakov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russia;
| | - Elena G. Bagryanskaya
- N.N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences (SB RAS), 9 Acad. Lavrentiev Avenue, Novosibirsk 630090, Russia; (N.B.A.); (L.Y.G.); (Y.F.P.); (T.V.R.); (M.S.K.)
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13
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Chen CH, Mentink-Vigier F, Trébosc J, Goldberga I, Gaveau P, Thomassot E, Iuga D, Smith ME, Chen K, Gan Z, Fabregue N, Métro TX, Alonso B, Laurencin D. Labeling and Probing the Silica Surface Using Mechanochemistry and 17 O NMR Spectroscopy*. Chemistry 2021; 27:12574-12588. [PMID: 34131984 PMCID: PMC8410671 DOI: 10.1002/chem.202101421] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Indexed: 01/21/2023]
Abstract
In recent years, there has been increasing interest in developing cost‐efficient, fast, and user‐friendly 17O enrichment protocols to help to understand the structure and reactivity of materials by using 17O NMR spectroscopy. Here, we show for the first time how ball milling (BM) can be used to selectively and efficiently enrich the surface of fumed silica, which is widely used at industrial scale. Short milling times (up to 15 min) allowed modulation of the enrichment level (up to ca. 5 %) without significantly changing the nature of the material. High‐precision 17O compositions were measured at different milling times by using large‐geometry secondary‐ion mass spectrometry (LG‐SIMS). High‐resolution 17O NMR analyses (including at 35.2 T) allowed clear identification of the signals from siloxane (Si−O−Si) and silanols (Si−OH), while DNP analyses, performed by using direct 17O polarization and indirect 17O{1H} CP excitation, agreed with selective labeling of the surface. Information on the distribution of Si−OH environments at the surface was obtained from 2D 1H−17O D‐HMQC correlations. Finally, the surface‐labeled silica was reacted with titania and using 17O DNP, their common interface was probed and Si−O−Ti bonds identified.
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Affiliation(s)
- Chia-Hsin Chen
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Frederic Mentink-Vigier
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | - Julien Trébosc
- Univ. Lille, CNRS, INRAE, Centrale Lille, Univ. Artois, FR 2638 - IMEC - Institut Michel-Eugène Chevreul, 59000, Lille, France
| | - Ieva Goldberga
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Emilie Thomassot
- Université de Lorraine, CRPG, CNRS UMR 7358, Vandœuvre-lès-Nancy, France
| | - Dinu Iuga
- Department of Physics, University of Warwick, CV4 7AL, Coventry, UK
| | - Mark E Smith
- Vice-Chancellor's Office and Department of Chemistry, Highfield Campus, University of Southampton, SO17 1BJ, Southampton, UK
| | - Kuizhi Chen
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | - Zhehong Gan
- National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, FL, USA
| | | | | | - Bruno Alonso
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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14
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Olademehin OP, Liu C, Rimal B, Adegboyega NF, Chen F, Sim C, Kim SJ. Dsi-RNA knockdown of genes regulated by Foxo reduces glycogen and lipid accumulations in diapausing Culex pipiens. Sci Rep 2020; 10:17201. [PMID: 33057122 PMCID: PMC7560664 DOI: 10.1038/s41598-020-74292-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 09/25/2020] [Indexed: 11/09/2022] Open
Abstract
Culex pipiens is a major carrier of the West Nile Virus, the leading cause of mosquito-borne disease in the continental United States. Cx. pipiens survive overwinter through diapause which is an important survival strategy that is under the control of insulin signaling and Foxo by regulating energy metabolism. Three homologous candidate genes, glycogen synthase (glys), atp-binding cassette transporter (atp), and low-density lipoprotein receptor chaperone (ldlr), that are under the regulation of Foxo transcription factor were identified in Cx. pipiens. To validate the gene functions, each candidate gene was silenced by injecting the target dsi-RNA to female Cx. pipiens during the early phase of diapause. The dsi-RNA injected diapause-destined female post-adult eclosion were fed for 7 days with 10% glucose containing 1% D-[13C6]glucose. The effects of dsi-RNA knockdown on glucose metabolism in intact mosquitoes were monitored using 13C solid-state NMR and ATR-FTIR. Our finding shows that the dsi-RNA knockdown of all three candidate genes suppressed glycogen and lipid biosyntheses resulting in inhibition of long-term carbon energy storage in diapausing females.
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Affiliation(s)
- Olatunde P Olademehin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, TX, 76706, USA
| | - Chengyin Liu
- Department of Chemistry, Howard University, 525 College St. N.W., Washington, D.C., 20059, USA
| | - Binayak Rimal
- Institute of Biomedical Studies, Baylor University, One Bear Place #97348, Waco, TX, USA
| | - Nathaniel F Adegboyega
- Department of Environmental Sciences, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Fu Chen
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - Cheolho Sim
- Department of Biology, Baylor University, One Bear Place #97348, Waco, TX, 76706, USA.
| | - Sung Joon Kim
- Department of Chemistry, Howard University, 525 College St. N.W., Washington, D.C., 20059, USA.
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15
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Novy V, Aïssa K, Nielsen F, Straus SK, Ciesielski P, Hunt CG, Saddler J. Quantifying cellulose accessibility during enzyme-mediated deconstruction using 2 fluorescence-tagged carbohydrate-binding modules. Proc Natl Acad Sci U S A 2019; 116:22545-22551. [PMID: 31636211 PMCID: PMC6842628 DOI: 10.1073/pnas.1912354116] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Two fluorescence-tagged carbohydrate-binding modules (CBMs), which specifically bind to crystalline (CBM2a-RRedX) and paracrystalline (CBM17-FITC) cellulose, were used to differentiate the supramolecular cellulose structures in bleached softwood Kraft fibers during enzyme-mediated hydrolysis. Differences in CBM adsorption were elucidated using confocal laser scanning microscopy (CLSM), and the structural changes occurring during enzyme-mediated deconstruction were quantified via the relative fluorescence intensities of the respective probes. It was apparent that a high degree of order (i.e., crystalline cellulose) occurred at the cellulose fiber surface, which was interspersed by zones of lower structural organization and increased cellulose accessibility. Quantitative image analysis, supported by 13C NMR, scanning electron microscopy (SEM) imaging, and fiber length distribution analysis, showed that enzymatic degradation predominates at these zones during the initial phase of the reaction, resulting in rapid fiber fragmentation and an increase in cellulose surface crystallinity. By applying this method to elucidate the differences in the enzyme-mediated deconstruction mechanisms, this work further demonstrated that drying decreased the accessibility of enzymes to these disorganized zones, resulting in a delayed onset of degradation and fragmentation. The use of fluorescence-tagged CBMs with specific recognition sites provided a quantitative way to elucidate supramolecular substructures of cellulose and their impact on enzyme accessibility. By designing a quantitative method to analyze the cellulose ultrastructure and accessibility, this study gives insights into the degradation mechanism of cellulosic substrates.
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Affiliation(s)
- Vera Novy
- Department of Wood Science, Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Kevin Aïssa
- Department of Wood Science, Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Fredrik Nielsen
- Department of Wood Science, Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Suzana K Straus
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Peter Ciesielski
- Biosciences Center, National Renewable Energy Laboratory, Golden, CO 80401
| | - Christopher G Hunt
- Forest Products Laboratory, US Department of Agriculture, Madison, WI 53726
| | - Jack Saddler
- Department of Wood Science, Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada;
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16
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Barclay AM, Dhavale DD, Courtney JM, Kotzbauer PT, Rienstra CM. Resonance assignments of an α-synuclein fibril prepared in Tris buffer at moderate ionic strength. BIOMOLECULAR NMR ASSIGNMENTS 2018; 12:195-199. [PMID: 29476328 PMCID: PMC5877819 DOI: 10.1007/s12104-018-9808-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 02/08/2018] [Indexed: 05/15/2023]
Abstract
Fibrils of the protein α-synuclein (α-syn) are implicated in the pathogenesis of Parkinson's disease and related neurodegenerative disorders. We have reported a high-resolution structure (PDB 2N0A) of an α-syn fibril form prepared by in vitro incubation of monomeric protein in 50 mM sodium phosphate buffer pH 7.4 with 0.1 mM EDTA and 0.01% sodium azide. In parallel with this structure determination, ongoing studies of small molecule ligands binding to α-syn fibrils, prepared in 2-amino-2-(hydroxymethyl)-1,3-propanediol (Tris) buffer, have been in progress, and it is therefore of interest to determine the structural similarity of these forms. Here we report the 13C and 15N resonance assignments for α-syn fibrils prepared with Tris-HCl buffer (pH 7.7 at 37 °C) and 100 mM NaCl. These fibrillization conditions yield a form with fibril core chemical shifts highly similar to those we reported (BMRB 16939) in the course of determining the high-resolution 2N0A structure, with the exception of some small perturbations from T44 to V55, including two sets of peaks observed for residues T44-V48. Additional differences occur in the patterns of observed residues in the primarily unstructured N-terminus. These results demonstrate a common fold of the fibril core for α-syn fibrils prepared in phosphate or Tris-HCl buffer at moderate ionic strength.
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Affiliation(s)
- Alexander M Barclay
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Dhruva D Dhavale
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Joseph M Courtney
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S Matthews Ave., Urbana, IL, 61801, USA
| | - Paul T Kotzbauer
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Chad M Rienstra
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S Matthews Ave., Urbana, IL, 61801, USA.
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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17
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Witty M, Dingra NN, Abboud KA, Felts AC, Ayudhya TIN. Nuclear Magnetic Resonance and X-ray Crystallography to Improve Struvite Determination. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1302459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Michael Witty
- Department of Mathematics and Science, School of Pure and Applied Sciences, Florida SouthWestern State College, Fort Myers, FL, USA
| | - Nin N. Dingra
- Department of Mathematics and Science, School of Pure and Applied Sciences, Florida SouthWestern State College, Fort Myers, FL, USA
| | - Khalil A. Abboud
- Department of Chemistry, University of Florida, Gainesville, FL, USA
| | - Ashley C. Felts
- Department of Chemistry, University of Florida, Gainesville, FL, USA
| | - Theppawut Israsena Na Ayudhya
- Department of Mathematics and Science, School of Pure and Applied Sciences, Florida SouthWestern State College, Fort Myers, FL, USA
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18
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Najdanova M, Gräsing D, Alia A, Matysik J. Analysis of the Electronic Structure of the Special Pair of a Bacterial Photosynthetic Reaction Center by 13 C Photochemically Induced Dynamic Nuclear Polarization Magic-Angle Spinning NMR Using a Double-Quantum Axis. Photochem Photobiol 2017; 94:69-80. [PMID: 28746728 DOI: 10.1111/php.12812] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 07/04/2017] [Indexed: 11/28/2022]
Abstract
The origin of the functional symmetry break in bacterial photosynthesis challenges since several decades. Although structurally very similar, the two branches of cofactors in the reaction center (RC) protein complex act very differently. Upon photochemical excitation, an electron is transported along one branch, while the other remains inactive. Photochemically induced dynamic nuclear polarization (photo-CIDNP) magic-angle spinning (MAS) 13 C NMR revealed that the two bacteriochlorophyll cofactors forming the "Special Pair" donor dimer are already well distinguished in the electronic ground state. These previous studies are relying solely on 13 C-13 C correlation experiments as radio-frequency-driven recoupling (RFDR) and dipolar-assisted rotational resonance (DARR). Obviously, the chemical-shift assignment is difficult in a dimer of tetrapyrrole macrocycles, having eight pyrrole rings of similar chemical shifts. To overcome this problem, an INADEQUATE type of experiment using a POST C7 symmetry-based approach is applied to selectively isotope-labeled bacterial RC of Rhodobacter (R.) sphaeroides wild type (WT). We, therefore, were able to distinguish unresolved sites of the macromolecular dimer. The obtained chemical-shift pattern is in-line with a concentric assembly of negative charge within the common center of the Special Pair supermolecule in the electronic ground state.
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Affiliation(s)
- Marija Najdanova
- Institute of Analytical Chemistry, University of Leipzig, Leipzig, Germany
| | - Daniel Gräsing
- Institute of Analytical Chemistry, University of Leipzig, Leipzig, Germany
| | - A Alia
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany.,Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Jörg Matysik
- Institute of Analytical Chemistry, University of Leipzig, Leipzig, Germany
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19
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Soss SE, Flynn PF, Iuliucci RJ, Young RP, Mueller LJ, Hartman J, Beran GJO, Harper JK. Measuring and Modeling Highly Accurate
15
N Chemical Shift Tensors in a Peptide. Chemphyschem 2017; 18:2225-2232. [DOI: 10.1002/cphc.201700357] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/08/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Sarah E. Soss
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Peter F. Flynn
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Robbie J. Iuliucci
- Department of Chemistry Washington and Jefferson College 60 Lincoln Street Washington PA 15301 USA
| | - Robert P. Young
- Department of Chemistry University of California Riverside CA 92521 USA
| | | | - Joshua Hartman
- Department of Chemistry University of California Riverside CA 92521 USA
| | | | - James K. Harper
- Department of Chemistry University of Central Florida 4111 Libra Drive Orlando FL 32816 USA
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20
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Capillary methacrylate-based monoliths by grafting from/to γ-ray polymerization on a tentacle-type reactive surface for the liquid chromatographic separations of small molecules and intact proteins. J Chromatogr A 2017; 1498:46-55. [DOI: 10.1016/j.chroma.2016.11.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/20/2016] [Accepted: 11/21/2016] [Indexed: 12/13/2022]
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21
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Piehl DW, Blancas-Mejía LM, Ramirez-Alvarado M, Rienstra CM. Solid-state NMR chemical shift assignments for AL-09 V L immunoglobulin light chain fibrils. BIOMOLECULAR NMR ASSIGNMENTS 2017; 11:45-50. [PMID: 27771830 PMCID: PMC5344749 DOI: 10.1007/s12104-016-9718-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 10/08/2016] [Indexed: 05/03/2023]
Abstract
Light chain (AL) amyloidosis is a systemic disease characterized by the formation of immunoglobulin light-chain fibrils in critical organs of the body. The light-chain protein AL-09 presents one severe case of cardiac AL amyloidosis, which contains seven mutations in the variable domain (VL) relative to its germline counterpart, κI O18/O8 VL. Three of these mutations are non-conservative-Y87H, N34I, and K42Q-and previous work has shown that they are responsible for significantly reducing the protein's thermodynamic stability, allowing fibril formation to occur with fast kinetics and across a wide-range of pH conditions. Currently, however, there is extremely limited structural information available which explicitly describes the residues that are involved in supporting the misfolded fibril structure. Here, we assign the site-specific 15N and 13C chemical shifts of the rigid residues of AL-09 VL fibrils by solid-state NMR, reporting on the regions of the protein involved in the fibril as well as the extent of secondary structure.
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Affiliation(s)
- Dennis W Piehl
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Luis M Blancas-Mejía
- Department of Biochemistry and Molecular Biology, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA
| | - Marina Ramirez-Alvarado
- Department of Biochemistry and Molecular Biology, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA.
| | - Chad M Rienstra
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S Matthews Ave, Urbana, IL, 61801, USA.
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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22
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Piehl D, Blancas-Mejía LM, Wall JS, Kennel SJ, Ramirez-Alvarado M, Rienstra CM. Immunoglobulin Light Chains Form an Extensive and Highly Ordered Fibril Involving the N- and C-Termini. ACS OMEGA 2017; 2:712-720. [PMID: 28261692 PMCID: PMC5331457 DOI: 10.1021/acsomega.6b00494] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 02/08/2017] [Indexed: 05/03/2023]
Abstract
Light-chain (AL)-associated amyloidosis is a systemic disorder involving the formation and deposition of immunoglobulin AL fibrils in various bodily organs. One severe instance of AL disease is exhibited by the patient-derived variable domain (VL) of the light chain AL-09, a 108 amino acid residue protein containing seven mutations relative to the corresponding germline protein, κI O18/O8 VL. Previous work has demonstrated that the thermodynamic stability of native AL-09 VL is greatly lowered by two of these mutations, Y87H and N34I, whereas a third mutation, K42Q, further increases the kinetics of fibril formation. However, detailed knowledge regarding the residues that are responsible for stabilizing the misfolded fibril structure is lacking. In this study, using solid-state NMR spectroscopy, we show that the majority of the AL-09 VL sequence is immobilized in the fibrils and that the N- and C-terminal portions of the sequence are particularly well-structured. Thus, AL-09 VL forms an extensively ordered and β-strand-rich fibril structure. Furthermore, we demonstrate that the predominant β-sheet secondary structure and rigidity observed for in vitro prepared AL-09 VL fibrils are qualitatively similar to those observed for AL fibrils extracted from postmortem human spleen tissue, suggesting that this conformation may be representative of a common feature of AL fibrils.
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Affiliation(s)
- Dennis
W. Piehl
- Department
of Biochemistry, Department of Chemistry, and Center for Biophysics and Computational
Biology, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, United States
| | - Luis M. Blancas-Mejía
- Department
of Biochemistry and Molecular Biology, Mayo
Clinic, 200 First Street SW, Rochester, Minnesota 55905, United States
| | - Jonathan S. Wall
- Department of Medicine and Department of Radiology, University
of Tennessee Graduate School of Medicine, 1924 Alcoa Hwy, Knoxville, Tennessee 37920, United States
| | - Stephen J. Kennel
- Department of Medicine and Department of Radiology, University
of Tennessee Graduate School of Medicine, 1924 Alcoa Hwy, Knoxville, Tennessee 37920, United States
| | - Marina Ramirez-Alvarado
- Department
of Biochemistry and Molecular Biology, Mayo
Clinic, 200 First Street SW, Rochester, Minnesota 55905, United States
- E-mail: . Phone: (507)-284-2705 (M.R.-A.)
| | - Chad M. Rienstra
- Department
of Biochemistry, Department of Chemistry, and Center for Biophysics and Computational
Biology, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, United States
- E-mail: . Phone: (217)-244-4655 (C.M.R.)
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23
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Frantsuzov I, Vasa SK, Ernst M, Brown SP, Zorin V, Kentgens APM, Hodgkinson P. Rationalising Heteronuclear Decoupling in Refocussing Applications of Solid-State NMR Spectroscopy. Chemphyschem 2017; 18:394-405. [PMID: 28111874 PMCID: PMC5396389 DOI: 10.1002/cphc.201601003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/07/2016] [Indexed: 12/16/2022]
Abstract
Factors affecting the performance of 1 H heteronuclear decoupling sequences for magic-angle spinning (MAS) NMR spectroscopy of organic solids are explored, as observed by time constants for the decay of nuclear magnetisation under a spin-echo (T2' ). By using a common protocol over a wide range of experimental conditions, including very high magnetic fields and very high radio-frequency (RF) nutation rates, decoupling performance is observed to degrade consistently with increasing magnetic field. Inhomogeneity of the RF field is found to have a significant impact on T2' values, with differences of about 20 % observed between probes with different coil geometries. Increasing RF nutation rates dramatically improve robustness with respect to RF offset, but the performance of phase-modulated sequences degrades at the very high nutation rates achievable in microcoils as a result of RF transients. The insights gained provide better understanding of the factors limiting decoupling performance under different conditions, and the high values of T2' observed (which generally exceed previous literature values) provide reference points for experiments involving spin magnetisation refocussing, such as 2D correlation spectra and measuring small spin couplings.
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Affiliation(s)
- Ilya Frantsuzov
- Department of ChemistryDurham UniversitySouth RoadDurhamDH1 3LEUnited Kingdom
| | - Suresh K. Vasa
- Institute for Molecules and MaterialsRadboud UniversityHeyendaalseweg 1356525 EDNijmegenThe Netherlands
| | - Matthias Ernst
- Laboratory of Physical ChemistryETH ZürichVladimir-Prelog-Weg 28093ZürichSwitzerland
| | - Steven P. Brown
- Department of PhysicsUniversity of WarwickCoventryCV4 7ALUnited Kingdom
| | - Vadim Zorin
- Agilent Technologies (UK) Ltd.6 Mead RoadYarntonOxfordshireOX5 1QUUnited Kingdom
- Mestrelab ResearchS.L Feliciano Barrera 9B—Bajo15706Santiago de CompostelaSpain
| | - Arno P. M. Kentgens
- Institute for Molecules and MaterialsRadboud UniversityHeyendaalseweg 1356525 EDNijmegenThe Netherlands
| | - Paul Hodgkinson
- Department of ChemistryDurham UniversitySouth RoadDurhamDH1 3LEUnited Kingdom
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24
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Tuttle MD, Comellas G, Nieuwkoop AJ, Covell DJ, Berthold DA, Kloepper KD, Courtney JM, Kim JK, Barclay AM, Kendall A, Wan W, Stubbs G, Schwieters CD, Lee VMY, George JM, Rienstra CM. Solid-state NMR structure of a pathogenic fibril of full-length human α-synuclein. Nat Struct Mol Biol 2016; 23:409-15. [PMID: 27018801 PMCID: PMC5034296 DOI: 10.1038/nsmb.3194] [Citation(s) in RCA: 692] [Impact Index Per Article: 86.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 02/25/2016] [Indexed: 12/17/2022]
Abstract
Misfolded α-synuclein amyloid fibrils are the principal components of Lewy bodies and neurites, hallmarks of Parkinson's disease (PD). We present a high-resolution structure of an α-synuclein fibril, in a form that induces robust pathology in primary neuronal culture, determined by solid-state NMR spectroscopy and validated by EM and X-ray fiber diffraction. Over 200 unique long-range distance restraints define a consensus structure with common amyloid features including parallel, in-register β-sheets and hydrophobic-core residues, and with substantial complexity arising from diverse structural features including an intermolecular salt bridge, a glutamine ladder, close backbone interactions involving small residues, and several steric zippers stabilizing a new orthogonal Greek-key topology. These characteristics contribute to the robust propagation of this fibril form, as supported by the structural similarity of early-onset-PD mutants. The structure provides a framework for understanding the interactions of α-synuclein with other proteins and small molecules, to aid in PD diagnosis and treatment.
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Affiliation(s)
- Marcus D Tuttle
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Gemma Comellas
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Andrew J Nieuwkoop
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Dustin J Covell
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Institute on Aging, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Deborah A Berthold
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Kathryn D Kloepper
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Joseph M Courtney
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Jae K Kim
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Alexander M Barclay
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Amy Kendall
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, USA
- Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - William Wan
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, USA
- Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Gerald Stubbs
- Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, USA
- Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Charles D Schwieters
- Division of Computational Bioscience, Center for Information Technology, National Institutes of Health, Bethesda, Maryland, USA
| | - Virginia M Y Lee
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Institute on Aging, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Julia M George
- Department of Biological and Experimental Psychology, School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | - Chad M Rienstra
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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25
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Hisao GS, Harland MA, Brown RA, Berthold DA, Wilson TE, Rienstra CM. An efficient method and device for transfer of semisolid materials into solid-state NMR spectroscopy rotors. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2016; 265:172-6. [PMID: 26905816 PMCID: PMC4818695 DOI: 10.1016/j.jmr.2016.01.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 01/17/2016] [Indexed: 05/23/2023]
Abstract
The study of mass-limited biological samples by magic angle spinning (MAS) solid-state NMR spectroscopy critically relies upon the high-yield transfer of material from a biological preparation into the MAS rotor. This issue is particularly important for maintaining biological activity and hydration of semi-solid samples such as membrane proteins in lipid bilayers, pharmaceutical formulations, microcrystalline proteins and protein fibrils. Here we present protocols and designs for rotor-packing devices specifically suited for packing hydrated samples into Pencil-style 1.6 mm, 3.2 mm standard, and 3.2 mm limited speed MAS rotors. The devices are modular and therefore readily adaptable to other rotor and/or ultracentrifugation tube geometries.
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Affiliation(s)
- Grant S Hisao
- University of Illinois at Urbana-Champaign, Department of Chemistry, 600 South Mathews Avenue, Urbana, IL 61801, USA.
| | - Michael A Harland
- University of Illinois at Urbana-Champaign, School of Chemical Sciences Machine Shop, 505 South Matthews Ave., Urbana, IL 61801, USA.
| | - Robert A Brown
- University of Illinois at Urbana-Champaign, School of Chemical Sciences Machine Shop, 505 South Matthews Ave., Urbana, IL 61801, USA
| | - Deborah A Berthold
- University of Illinois at Urbana-Champaign, Department of Chemistry, 600 South Mathews Avenue, Urbana, IL 61801, USA.
| | - Thomas E Wilson
- University of Illinois at Urbana-Champaign, School of Chemical Sciences Machine Shop, 505 South Matthews Ave., Urbana, IL 61801, USA.
| | - Chad M Rienstra
- University of Illinois at Urbana-Champaign, Department of Chemistry, 600 South Mathews Avenue, Urbana, IL 61801, USA; University of Illinois at Urbana-Champaign, Department of Biochemistry, Center for Biophysics and Quantitative Biology, 600 South Mathews Avenue, Urbana, IL 61801, USA.
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26
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Kalakewich K, Iuliucci R, Mueller KT, Eloranta H, Harper JK. Monitoring the refinement of crystal structures with 15N solid-state NMR shift tensor data. J Chem Phys 2015; 143:194702. [DOI: 10.1063/1.4935367] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Keyton Kalakewich
- Department of Chemistry, University of Central Florida, 4104 Libra Drive, Orlando, Florida 32816, USA
| | - Robbie Iuliucci
- Department of Chemistry, Washington and Jefferson College, 60 Lincoln Street, Washington, Pennsylvania 15301, USA
| | - Karl T. Mueller
- Department of Chemistry, Penn State University, University Park, Pennsylvania 16802, USA
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Harriet Eloranta
- Department of Chemistry, University of Central Florida, 4104 Libra Drive, Orlando, Florida 32816, USA
| | - James K. Harper
- Department of Chemistry, University of Central Florida, 4104 Libra Drive, Orlando, Florida 32816, USA
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27
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Miller AF. Solid-state NMR of flavins and flavoproteins. Methods Mol Biol 2014; 1146:307-40. [PMID: 24764096 DOI: 10.1007/978-1-4939-0452-5_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Why apply solid-state NMR (SSNMR) to flavins and flavoproteins? NMR provides information on an atom-specific basis about chemical functionality, structure, proximity to other groups, and dynamics of the system. Thus, it has become indispensable to the study of chemicals, materials, catalysts, and biomolecules. It is no surprise then that NMR has a great deal to offer in the study of flavins and flavoenzymes. In general, their catalytic or electron-transfer activity resides essentially in the flavin, a molecule eminently accessible by NMR. However, the specific reactivity displayed depends on a host of subtle interactions whereby the protein biases and reshapes the flavin's propensities to activate it for one reaction while suppressing other aspects of this cofactor's prodigious repertoire (Massey et al., J Biol Chem 244:3999-4006, 1969; Müller, Z Naturforsch 27B:1023-1026, 1972; Joosten and van Berkel, Curr Opin Struct Biol 11:195-202, 2007). Thus, we are fascinated to learn about how the flavin cofactor of one enzyme is, and is not, like the flavin cofactor of another. In what follows, we describe how the capabilities of SSNMR can help and are beginning to bear fruit in this exciting endeavor.
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Affiliation(s)
- Anne-Frances Miller
- Department of Chemistry, University of Kentucky, 505 Rose St, Lexington, KY, 40506-0055, USA,
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28
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Proietti N, Capitani D, Di Tullio V. Applications of nuclear magnetic resonance sensors to cultural heritage. SENSORS 2014; 14:6977-97. [PMID: 24755519 PMCID: PMC4029666 DOI: 10.3390/s140406977] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/08/2014] [Accepted: 04/15/2014] [Indexed: 11/24/2022]
Abstract
In recent years nuclear magnetic resonance (NMR) sensors have been increasingly applied to investigate, characterize and monitor objects of cultural heritage interest. NMR is not confined to a few specific applications, but rather its use can be successfully extended to a wide number of different cultural heritage issues. A breakthrough has surely been the recent development of portable NMR sensors which can be applied in situ for non-destructive and non-invasive investigations. In this paper three studies illustrating the potential of NMR sensors in this field of research are reported.
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Affiliation(s)
- Noemi Proietti
- Laboratorio di Risonanza Magnetica "Annalaura Segre", Istituto di Metodologie Chimiche, CNR Area della Ricerca di Roma 1, Via Salaria Km 29,300, 00015 Monterotondo (Rome), Italy.
| | - Donatella Capitani
- Laboratorio di Risonanza Magnetica "Annalaura Segre", Istituto di Metodologie Chimiche, CNR Area della Ricerca di Roma 1, Via Salaria Km 29,300, 00015 Monterotondo (Rome), Italy.
| | - Valeria Di Tullio
- Laboratorio di Risonanza Magnetica "Annalaura Segre", Istituto di Metodologie Chimiche, CNR Area della Ricerca di Roma 1, Via Salaria Km 29,300, 00015 Monterotondo (Rome), Italy.
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29
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Anderson TM, Clay MC, Cioffi AG, Diaz KA, Hisao GS, Tuttle MD, Nieuwkoop AJ, Comellas G, Maryum N, Wang S, Uno BE, Wildeman EL, Gonen T, Rienstra CM, Burke MD. Amphotericin forms an extramembranous and fungicidal sterol sponge. Nat Chem Biol 2014; 10:400-6. [PMID: 24681535 PMCID: PMC3992202 DOI: 10.1038/nchembio.1496] [Citation(s) in RCA: 310] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 02/20/2014] [Indexed: 01/14/2023]
Abstract
For over 50 years, amphotericin has remained the powerful but highly toxic last line of defense in treating life-threatening fungal infections in humans with minimal development of microbial resistance. Understanding how this small molecule kills yeast is thus critical for guiding development of derivatives with an improved therapeutic index and other resistance-refractory antimicrobial agents. In the widely accepted ion channel model for its mechanism of cytocidal action, amphotericin forms aggregates inside lipid bilayers that permeabilize and kill cells. In contrast, we report that amphotericin exists primarily in the form of large, extramembranous aggregates that kill yeast by extracting ergosterol from lipid bilayers. These findings reveal that extraction of a polyfunctional lipid underlies the resistance-refractory antimicrobial action of amphotericin and suggests a roadmap for separating its cytocidal and membrane-permeabilizing activities. This new mechanistic understanding is also guiding development of what are to our knowledge the first derivatives of amphotericin that kill yeast but not human cells.
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Affiliation(s)
- Thomas M Anderson
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2]
| | - Mary C Clay
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2]
| | - Alexander G Cioffi
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Katrina A Diaz
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Grant S Hisao
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Marcus D Tuttle
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Andrew J Nieuwkoop
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Gemma Comellas
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Nashrah Maryum
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Shu Wang
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Brice E Uno
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Erin L Wildeman
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Tamir Gonen
- Howard Hughes Medical Institute, Janelia Farm Research Campus, Ashburn, Virginia, USA
| | - Chad M Rienstra
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [3] Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Martin D Burke
- 1] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [2] Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA. [3] Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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30
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Madhu PK. Heteronuclear Spin Decoupling in Solid-State Nuclear Magnetic Resonance: Overview and Outlook. Isr J Chem 2013. [DOI: 10.1002/ijch.201300097] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Michaelis VK, Corzilius B, Smith AA, Griffin RG. Dynamic nuclear polarization of 17O: direct polarization. J Phys Chem B 2013; 117:14894-906. [PMID: 24195759 PMCID: PMC3922122 DOI: 10.1021/jp408440z] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dynamic nuclear polarization of (17)O was studied using four different polarizing agents: the biradical TOTAPOL and the monoradicals trityl and SA-BDPA, as well as a mixture of the latter two. Field profiles, DNP mechanisms, and enhancements were measured to better understand and optimize directly polarizing this low-gamma quadrupolar nucleus using both mono- and biradical polarizing agents. Enhancements were recorded at <88 K and were >100 using the trityl (OX063) radical and <10 with the other polarizing agents. The >10,000-fold savings in acquisition time enabled a series of biologically relevant small molecules to be studied with small sample sizes and the measurement of various quadrupolar parameters. The results are discussed with comparison to room temperature studies and GIPAW quantum chemical calculations. These experimental results illustrate the strength of high field DNP and the importance of radical selection for studying low-gamma nuclei.
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Affiliation(s)
- Vladimir K. Michaelis
- Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | | | | | - Robert G. Griffin
- Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
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32
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Agarwal V, Tuherm T, Reinhold A, Past J, Samoson A, Ernst M, Meier BH. Amplitude-modulated low-power decoupling sequences for fast magic-angle spinning NMR. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.07.073] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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Non-invasive NMR stratigraphy of a multi-layered artefact: an ancient detached mural painting. Anal Bioanal Chem 2013; 405:8669-75. [DOI: 10.1007/s00216-013-7278-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 07/16/2013] [Accepted: 07/26/2013] [Indexed: 10/26/2022]
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34
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Comellas G, Rienstra CM. Protein Structure Determination by Magic-Angle Spinning Solid-State NMR, and Insights into the Formation, Structure, and Stability of Amyloid Fibrils. Annu Rev Biophys 2013; 42:515-36. [DOI: 10.1146/annurev-biophys-083012-130356] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Chad M. Rienstra
- Center for Biophysics and Computational Biology,
- Department of Chemistry, and
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801; ,
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35
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Lemkau LR, Comellas G, Lee SW, Rikardsen LK, Woods WS, George JM, Rienstra CM. Site-specific perturbations of alpha-synuclein fibril structure by the Parkinson's disease associated mutations A53T and E46K. PLoS One 2013; 8:e49750. [PMID: 23505409 PMCID: PMC3591419 DOI: 10.1371/journal.pone.0049750] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 10/17/2012] [Indexed: 12/15/2022] Open
Abstract
Parkinson's disease (PD) is pathologically characterized by the presence of Lewy bodies (LBs) in dopaminergic neurons of the substantia nigra. These intracellular inclusions are largely composed of misfolded α-synuclein (AS), a neuronal protein that is abundant in the vertebrate brain. Point mutations in AS are associated with rare, early-onset forms of PD, although aggregation of the wild-type (WT) protein is observed in the more common sporadic forms of the disease. Here, we employed multidimensional solid-state NMR experiments to assess A53T and E46K mutant fibrils, in comparison to our recent description of WT AS fibrils. We made de novo chemical shift assignments for the mutants, and used these chemical shifts to empirically determine secondary structures. We observe significant perturbations in secondary structure throughout the fibril core for the E46K fibril, while the A53T fibril exhibits more localized perturbations near the mutation site. Overall, these results demonstrate that the secondary structure of A53T has some small differences from the WT and the secondary structure of E46K has significant differences, which may alter the overall structural arrangement of the fibrils.
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Affiliation(s)
- Luisel R. Lemkau
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Gemma Comellas
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Shin W. Lee
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Lars K. Rikardsen
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Wendy S. Woods
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Julia M. George
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Chad M. Rienstra
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
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36
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Exploring connections between phase-modulated heteronuclear dipolar decoupling schemes in solid-state NMR. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Mithu VS, Pratihar S, Paul S, Madhu PK. Efficiency of heteronuclear dipolar decoupling schemes in solid-state NMR: investigation of effective transverse relaxation times. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2012; 220:8-17. [PMID: 22683576 DOI: 10.1016/j.jmr.2012.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 04/11/2012] [Accepted: 04/15/2012] [Indexed: 06/01/2023]
Abstract
We here compare the T(2)(') values of various heteronuclear dipolar decoupling schemes commonly used in solid-state nuclear magnetic resonance experiments. Swept-frequency two-pulse phase modulation scheme is shown to give longer T(2)(') values for the majority of the magic-angle-spinning frequencies and radiofrequency amplitudes considered here. The longer T(2)(') values obtained are shown to yield spectra with higher resolution in experiments, such as INADEQUATE, which incorporate spin-echo blocks. Such blocks normally constitute the indirect dimension of a multidimensional experiment during which heteronuclear dipolar decoupling is applied, thereby making the relevance of T(2)(') manifest clearly. Experimental results are shown on samples of glycine, alanine, and Aβ(42).
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Affiliation(s)
- Venus Singh Mithu
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
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38
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Comellas G, Lemkau LR, Zhou DH, George JM, Rienstra CM. Structural intermediates during α-synuclein fibrillogenesis on phospholipid vesicles. J Am Chem Soc 2012; 134:5090-9. [PMID: 22352310 PMCID: PMC3331674 DOI: 10.1021/ja209019s] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
α-Synuclein (AS) fibrils are the main protein component of Lewy bodies, the pathological hallmark of Parkinson's disease and other related disorders. AS forms helices that bind phospholipid membranes with high affinity, but no atomic level data for AS aggregation in the presence of lipids is yet available. Here, we present direct evidence of a conversion from α-helical conformation to β-sheet fibrils in the presence of anionic phospholipid vesicles and direct conversion to β-sheet fibrils in their absence. We have trapped intermediate states throughout the fibril formation pathways to examine the structural changes using solid-state NMR spectroscopy and electron microscopy. The comparison between mature AS fibrils formed in aqueous buffer and those derived in the presence of anionic phospholipids demonstrates no major changes in the overall fibril fold. However, a site-specific comparison of these fibrillar states demonstrates major perturbations in the N-terminal domain with a partial disruption of the long β-strand located in the 40s and small perturbations in residues located in the "non-β amyloid component" (NAC) domain. Combining all these results, we propose a model for AS fibrillogenesis in the presence of phospholipid vesicles.
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Affiliation(s)
- Gemma Comellas
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Luisel R. Lemkau
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Donghua H. Zhou
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Julia M. George
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Chad M. Rienstra
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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Lemkau LR, Comellas G, Kloepper KD, Woods WS, George JM, Rienstra CM. Mutant protein A30P α-synuclein adopts wild-type fibril structure, despite slower fibrillation kinetics. J Biol Chem 2012; 287:11526-32. [PMID: 22334684 DOI: 10.1074/jbc.m111.306902] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
α-Synuclein (AS) is associated with both sporadic and familial forms of Parkinson disease (PD). In sporadic disease, wild-type AS fibrillates and accumulates as Lewy bodies within dopaminergic neurons of the substantia nigra. The accumulation of misfolded AS is associated with the death of these neurons, which underlies many of the clinical features of PD. In addition, a rare missense mutation in AS, A30P, is associated with highly penetrant, autosomal dominant PD, although the pathogenic mechanism is unclear. A30P AS fibrillates more slowly than the wild-type (WT) protein in vitro and has been reported to preferentially adopt a soluble, protofibrillar conformation. This has led to speculation that A30P forms aggregates that are distinct in structure compared with wild-type AS. Here, we perform a detailed comparison of the chemical shifts and secondary structures of these fibrillar species, based upon our recent characterization of full-length WT fibrils. We have assigned A30P AS fibril chemical shifts de novo and used them to determine its secondary structure empirically. Our results illustrate that although A30P forms fibrils more slowly than WT in vitro, the chemical shifts and secondary structure of the resultant fibrils are in high agreement, demonstrating a conserved β-sheet core.
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Affiliation(s)
- Luisel R Lemkau
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA
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40
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Demers JP, Chevelkov V, Lange A. Progress in correlation spectroscopy at ultra-fast magic-angle spinning: basic building blocks and complex experiments for the study of protein structure and dynamics. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2011; 40:101-113. [PMID: 21880471 DOI: 10.1016/j.ssnmr.2011.07.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 07/21/2011] [Accepted: 07/22/2011] [Indexed: 05/31/2023]
Abstract
Recent progress in multi-dimensional solid-state NMR correlation spectroscopy at high static magnetic fields and ultra-fast magic-angle spinning is discussed. A focus of the review is on applications to protein resonance assignment and structure determination as well as on the characterization of protein dynamics in the solid state. First, the consequences of ultra-fast spinning on sensitivity and sample heating are considered. Recoupling and decoupling techniques at ultra-fast MAS are then presented, as well as more complex experiments assembled from these basic building blocks. Furthermore, we discuss new avenues in biomolecular solid-state NMR spectroscopy that become feasible in the ultra-fast spinning regime, such as sensitivity enhancement based on paramagnetic doping, and the prospect of direct proton detection.
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Affiliation(s)
- Jean-Philippe Demers
- Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
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41
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Comellas G, Lemkau LR, Nieuwkoop AJ, Kloepper KD, Ladror DT, Ebisu R, Woods WS, Lipton AS, George JM, Rienstra CM. Structured regions of α-synuclein fibrils include the early-onset Parkinson's disease mutation sites. J Mol Biol 2011; 411:881-95. [PMID: 21718702 PMCID: PMC3157309 DOI: 10.1016/j.jmb.2011.06.026] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 06/07/2011] [Accepted: 06/15/2011] [Indexed: 11/20/2022]
Abstract
α-Synuclein (AS) fibrils are the major component of Lewy bodies, the pathological hallmark of Parkinson's disease (PD). Here, we use results from an extensive investigation employing solid-state NMR to present a detailed structural characterization and conformational dynamics quantification of full-length AS fibrils. Our results show that the core extends with a repeated structural motif. This result disagrees with the previously proposed fold of AS fibrils obtained with limited solid-state NMR data. Additionally, our results demonstrate that the three single point mutations associated with early-onset PD-A30P, E46K and A53T-are located in structured regions. We find that E46K and A53T mutations, located in rigid β-strands of the wild-type fibrils, are associated with major and minor structural perturbations, respectively.
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Affiliation(s)
- Gemma Comellas
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Luisel R. Lemkau
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Andrew J. Nieuwkoop
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Kathryn D. Kloepper
- Department of Chemistry, Mercer University, 1400 Coleman Avenue, Macon, Georgia, 31207, USA
| | - Daniel T. Ladror
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Reika Ebisu
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Wendy S. Woods
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Andrew S. Lipton
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99352, USA
| | - Julia M. George
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
| | - Chad M. Rienstra
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
- Department of Biochemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois, 61801, USA
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