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Falourd X, Lahaye M, Rondeau-Mouro C. Probing structural features in potato starch granules at moderate hydration through the modelling of 1H-> 13C polarization transfer kinetics. Int J Biol Macromol 2024:132806. [PMID: 38834120 DOI: 10.1016/j.ijbiomac.2024.132806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/10/2024] [Accepted: 05/30/2024] [Indexed: 06/06/2024]
Abstract
The structural arrangement of starch polymers in presence of water is known to impact the functional properties of starchy products. In this study, the hydration of potato starch granules was investigated at the molecular level through various 1H->13C polarization transfer solid-state Nuclear Magnetic Resonance (ss-NMR) experiments. The impact of increasing the water content from 12.3 % to 45.9 % was assessed using 13C Cross Polarization Magic Angle Spinning (CPMAS), Variable Contact Time (VCT-CPMAS), Variable Spin Lock (VSL-CPMAS), and T One Rho QUEnching (TORQUE) NMR sequences. Of these, VCT-CPMAS proved to be the most promising. When applied with an optimal number of contact times, it enabled the application of several mathematical models that provided detailed insights into the structuring of protons in the hydrated potato starch granules. At low hydration (12.3 %), the models enabled various structural domains to be distinguished, which we suggest are associated with helical and amorphous structures. At moderate hydration (45.9 %), we tested two fitting models. Two pools of protons were revealed, corresponding to loosely ordered structures on the scale of tens of nanometers. These findings suggest varying water distribution during starch hydration and are likely to indicate variable hydration levels in the multilamellar amorphous structures of starch granules.
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Affiliation(s)
- X Falourd
- INRAE, UR1268 BIA, F-44316 Nantes, France; INRAE, BIBS Facility, PROBE Infrastructure, F-44316 Nantes, France.
| | - M Lahaye
- INRAE, UR1268 BIA, F-44316 Nantes, France
| | - C Rondeau-Mouro
- INRAE, UR1466 OPAALE, 17 Avenue de Cucillé, CS 64427, F-35044 Rennes, France
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Schahl A, Lemassu A, Jolibois F, Réat V. Evidence for amylose inclusion complexes with multiple acyl chain lipids using solid-state NMR and theoretical approaches. Carbohydr Polym 2022; 276:118749. [PMID: 34823780 DOI: 10.1016/j.carbpol.2021.118749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/22/2021] [Accepted: 10/08/2021] [Indexed: 11/02/2022]
Abstract
Amylose is known to form inclusion complexes in the presence of hydrophobic guests. Among lipids, only single-chain fatty acids have been reported as possible guests with the surrounding amylose in a well-defined V-helix conformation. Using experimental 13C solid-state NMR, we studied the formation of inclusion complexes between amylose and a variety of multiple-chains lipids of increasing complexity. Molecular dynamics simulations and calculations of 13C isotropic chemical shifts using the Density Functional Theory approach were performed to support the interpretation of experimental spectra. We provide unambiguous evidences that amylose forms inclusion complexes with lipids bearing multiple acyl chains. Amylose conformations around these lipids are characterized by {ϕ,ψ} anomeric bond dihedral angles near {115°,105°}. In the 13C NMR spectra, this translates into C1 and C4 chemical shifts of 102.5 ppm and 81.1 ppm, regardless of the helical conformation of the amylose surrounding the acyl chains.
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Affiliation(s)
- Adrien Schahl
- Institut de Pharmacologie et Biologie Structurale, IPBS, UMR5089, Université de Toulouse, CNRS, UPS, BP 64182, 205 route de Narbonne, 31077 Toulouse, Cedex 04, France; LPCNO, Université Fédérale de Toulouse Midi-Pyrénées, UMR5215, INSA-CNRS-UPS, 135 avenue de Rangueil, 31077 Cedex 4 Toulouse, France
| | - Anne Lemassu
- Institut de Pharmacologie et Biologie Structurale, IPBS, UMR5089, Université de Toulouse, CNRS, UPS, BP 64182, 205 route de Narbonne, 31077 Toulouse, Cedex 04, France
| | - Franck Jolibois
- LPCNO, Université Fédérale de Toulouse Midi-Pyrénées, UMR5215, INSA-CNRS-UPS, 135 avenue de Rangueil, 31077 Cedex 4 Toulouse, France
| | - Valérie Réat
- Institut de Pharmacologie et Biologie Structurale, IPBS, UMR5089, Université de Toulouse, CNRS, UPS, BP 64182, 205 route de Narbonne, 31077 Toulouse, Cedex 04, France.
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Cordova M, Balodis M, Hofstetter A, Paruzzo F, Nilsson Lill SO, Eriksson ESE, Berruyer P, Simões de Almeida B, Quayle MJ, Norberg ST, Svensk Ankarberg A, Schantz S, Emsley L. Structure determination of an amorphous drug through large-scale NMR predictions. Nat Commun 2021; 12:2964. [PMID: 34016980 PMCID: PMC8137699 DOI: 10.1038/s41467-021-23208-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/25/2021] [Indexed: 11/17/2022] Open
Abstract
Knowledge of the structure of amorphous solids can direct, for example, the optimization of pharmaceutical formulations, but atomic-level structure determination in amorphous molecular solids has so far not been possible. Solid-state nuclear magnetic resonance (NMR) is among the most popular methods to characterize amorphous materials, and molecular dynamics (MD) simulations can help describe the structure of disordered materials. However, directly relating MD to NMR experiments in molecular solids has been out of reach until now because of the large size of these simulations. Here, using a machine learning model of chemical shifts, we determine the atomic-level structure of the hydrated amorphous drug AZD5718 by combining dynamic nuclear polarization-enhanced solid-state NMR experiments with predicted chemical shifts for MD simulations of large systems. From these amorphous structures we then identify H-bonding motifs and relate them to local intermolecular complex formation energies.
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Affiliation(s)
- Manuel Cordova
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- National Centre for Computational Design and Discovery of Novel Materials MARVEL, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Martins Balodis
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Albert Hofstetter
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Federico Paruzzo
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Sten O Nilsson Lill
- Early Product Development and Manufacturing, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Emma S E Eriksson
- Early Product Development and Manufacturing, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Pierrick Berruyer
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Bruno Simões de Almeida
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Michael J Quayle
- New Modalities and Parenteral Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, Sweden
| | - Stefan T Norberg
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, Sweden
| | - Anna Svensk Ankarberg
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, Sweden
| | - Staffan Schantz
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, Sweden.
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- National Centre for Computational Design and Discovery of Novel Materials MARVEL, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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