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Journal articles on the topic 'Solid-state hydrogen/deuterium exchange'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Dadayan, A. K., Yu A. Borisov, Yu A. Zolotarev, E. V. Bocharov, I. Yu Nagaev, and N. F. Myasoedov. "Solid-State Catalytic Hydrogen/Deuterium Exchange in Mexidol." Russian Journal of Physical Chemistry A 95, no. 2 (2021): 273–78. http://dx.doi.org/10.1134/s0036024421020096.

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2

Dadayan, A. K., Yu A. Borisov, E. V. Bocharov, Yu A. Zolotarev, I. Yu Nagaev, and N. F. Myasoedov. "Solid state catalytic hydrogen exchange for deuterium in cycloprolylglycine." Доклады Академии наук 484, no. 3 (2019): 307–11. http://dx.doi.org/10.31857/s0869-56524843307-311.

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The reaction of spillover hydrogen (SH) with cyclopropylglycine (cPG) in high-temperature solid-state catalytic hydrogen isotope exchange (HTCIE) has been studied experimentally and using density functional theory (DFT). NMR spectroscopy and mass spectrometry have shown a high regioselectivity and stereoselectivity for the reaction of spillover hydrogen with cPG fragments. The Gly fragment has been shown to be the most reactive in HTCIE, for which high stereoselectivity of substitution of hydrogen by deuterium has been demonstrated.

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3

Kammari, Rajashekar, and Elizabeth M. Topp. "Prehydration and the Reversibility of Solid-State Hydrogen–Deuterium Exchange." Molecular Pharmaceutics 17, no. 9 (2020): 3541–52. http://dx.doi.org/10.1021/acs.molpharmaceut.0c00571.

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4

Kita, Akiko, and Yukio Morimoto. "Hydrogen/deuterium exchange behavior in tetragonal hen egg-white lysozyme crystals affected by solution state." Journal of Applied Crystallography 53, no. 3 (2020): 837–40. http://dx.doi.org/10.1107/s1600576720005488.

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Neutron diffraction studies of hydrogen/deuterium-exchanged hen egg-white lysozyme were performed by a joint X-ray and neutron refinement to elucidate the hydrogen/deuterium exchange behavior. Large crystals for neutron work, consisting of molecules that were exchanged before crystallization, were obtained by repeatedly adding protein solution to the crystal batch using deuterated precipitant reagent. There are differences in hydrogen/deuterium exchange behavior compared with previous crystallographic or NMR studies, which could be due to intermolecular interactions in the crystal or to differ

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5

Dadayan, A. K., Yu A. Borisov, E. V. Bocharov, Yu A. Zolotarev, I. Yu Nagaev, and N. F. Myasoedov. "Solid-State Catalytic Isotope Exchange of Hydrogen for Deuterium in Cyclopropylglycine." Doklady Physical Chemistry 484, no. 1 (2019): 15–19. http://dx.doi.org/10.1134/s0012501619010056.

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6

Hagemann, Hans, Vincenza D’Anna, Jean-Philippe Rapin, and Klaus Yvon. "Deuterium−Hydrogen Exchange in Solid Mg(BH4)2." Journal of Physical Chemistry C 114, no. 21 (2010): 10045–47. http://dx.doi.org/10.1021/jp101484f.

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7

del Amo, Juan-Miguel Lopez, Uwe Fink, and Bernd Reif. "Quantification of protein backbone hydrogen-deuterium exchange rates by solid state NMR spectroscopy." Journal of Biomolecular NMR 48, no. 4 (2010): 203–12. http://dx.doi.org/10.1007/s10858-010-9450-8.

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8

Kammari, Rajashekar, and Elizabeth M. Topp. "Solid-State Hydrogen–Deuterium Exchange Mass Spectrometry (ssHDX-MS) of Lyophilized Poly-d,l-Alanine." Molecular Pharmaceutics 16, no. 7 (2019): 2935–46. http://dx.doi.org/10.1021/acs.molpharmaceut.9b00162.

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9

Moorthy, Balakrishnan S., Isidro E. Zarraga, Lokesh Kumar, et al. "Solid-State Hydrogen–Deuterium Exchange Mass Spectrometry: Correlation of Deuterium Uptake and Long-Term Stability of Lyophilized Monoclonal Antibody Formulations." Molecular Pharmaceutics 15, no. 1 (2017): 1–11. http://dx.doi.org/10.1021/acs.molpharmaceut.7b00504.

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10

Cotten, M., R. Fu, and T. A. Cross. "Solid-State NMR and Hydrogen-Deuterium Exchange in a Bilayer-Solubilized Peptide: Structural and Mechanistic Implications." Biophysical Journal 76, no. 3 (1999): 1179–89. http://dx.doi.org/10.1016/s0006-3495(99)77282-6.

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11

Penner, Glenn H., YC Phillis Chang, and H. Michelle Grandin. "A solid state NMR and molecular orbital study of hydroxylammonium chloride." Canadian Journal of Chemistry 77, no. 11 (1999): 1813–20. http://dx.doi.org/10.1139/v99-156.

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Deuterium and nitrogen-15 NMR spectroscopy has been used to measure the 2H quadrupolar coupling and 15N chemical shift tensors in solid hydroxylammonium chloride, NH3OH+Cl-, (HAC). In addition, the NH3 and OH dynamics have been investigated by variable temperature 2H line shapes and T1 measurements. The Arrhenius activation energy for NH3 rotation is 22.5 ± 1.8 kJ/mol with a pre-exponential factor of 8 ± 3 × 1012 s-1 from line shapes and 21.3 ± 2 kJ/mol with an infinite temperature correlation time, τinf,, of 5.0 ± 0.4 × 10-14 s from the T1 analysis. The latter value corresponds to a pre-expon

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12

Kammari, Rajashekar, та Elizabeth M. Topp. "Effects of Secondary Structure on Solid-State Hydrogen–Deuterium Exchange in Model α-Helix and β-Sheet Peptides". Molecular Pharmaceutics 17, № 9 (2020): 3501–12. http://dx.doi.org/10.1021/acs.molpharmaceut.0c00521.

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13

Tukra, Rishabh, Sam Gardner, and Elizabeth M. Topp. "Effects of temperature and relative humidity in D2O on solid-state hydrogen deuterium exchange mass spectrometry (ssHDX-MS)." International Journal of Pharmaceutics 596 (March 2021): 120263. http://dx.doi.org/10.1016/j.ijpharm.2021.120263.

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14

KAWANO, Keiichi, and Tomoyasu AIZAWA. "Identification of Protein Adsorbing Site onto Solid Surface Using Hydrogen-Deuterium Exchange Labeling." Seibutsu Butsuri 39, no. 2 (1999): 109–12. http://dx.doi.org/10.2142/biophys.39.109.

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15

Chevelkov, Veniamin, Karin Giller, Stefan Becker, and Adam Lange. "Measurement of backbone hydrogen-deuterium exchange in the type III secretion system needle protein PrgI by solid-state NMR." Journal of Magnetic Resonance 283 (October 2017): 110–16. http://dx.doi.org/10.1016/j.jmr.2017.08.012.

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16

Wehrmann, F., J. Albrecht, E. Gedat та ін. "Hydrogen Deuterium Isotope Effect on Exchange Rates in η2Bond Transition Metal Dihydrogen Complexes Revealed by2H Solid State NMR Spectroscopy". Journal of Physical Chemistry A 106, № 12 (2002): 2855–61. http://dx.doi.org/10.1021/jp012087w.

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17

Kopylov, Arthur T., Nikolay F. Myasoedov, Alexander K. Dadayan, Victor G. Zgoda, Alexei E. Medvedev, and Yurii A. Zolotarev. "Use of deuterium labeling by high-temperature solid-state hydrogen-exchange reaction for mass spectrometric analysis of bradykinin biotransformation." Rapid Communications in Mass Spectrometry 30, no. 11 (2016): 1283–94. http://dx.doi.org/10.1002/rcm.7558.

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18

Wang, Shenlin, Lichi Shi, Izuru Kawamura, Leonid S. Brown, and Vladimir Ladizhansky. "Site-Specific Solid-State NMR Detection of Hydrogen-Deuterium Exchange Reveals Conformational Changes in a 7-Helical Transmembrane Protein." Biophysical Journal 101, no. 3 (2011): L23—L25. http://dx.doi.org/10.1016/j.bpj.2011.06.035.

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19

AbouGhaly, Mohamed H. H., Jiali Du, Sajal M. Patel, and Elizabeth M. Topp. "Effects of ionic interactions on protein stability prediction using solid-state hydrogen deuterium exchange with mass spectrometry (ssHDX-MS)." International Journal of Pharmaceutics 568 (September 2019): 118512. http://dx.doi.org/10.1016/j.ijpharm.2019.118512.

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20

Fang, Rui, Wasfy Obeidat, Michael J. Pikal, and Robin H. Bogner. "Correction to: Evaluation of Predictors of Protein Relative Stability Obtained by \Solid-State Hydrogen/Deuterium Exchange Monitored by FTIR." Pharmaceutical Research 38, no. 2 (2021): 379. http://dx.doi.org/10.1007/s11095-021-03016-w.

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21

Chao, R. S., T. J. Thamann, and K. C. Vail. "Vibrational Spectroscopic Analysis of Minoxidil (2,4-Diamino-6-Piperidinopyrimidine-3-Oxide) and Related Analogs." Applied Spectroscopy 42, no. 2 (1988): 236–42. http://dx.doi.org/10.1366/0003702884428338.

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Tentative vibrational assignments for 2,4-diamino-6-piperidinopyrimidine-3-oxide (minoxidil) between 4000 and 600 cm−1 have been made. Complementary infrared and Raman studies indicate that the two amino groups of minoxidil are not equivalent in the solid state. One of them is a free amino group, while the other is hydrogen bonded to the N-oxide. Vibrational spectroscopic analyses of minoxidil in different molecular environments, such as in polar solvents, aprotic solvents, and deuterium oxide, as well as in the pH = 1.5–12.5 range, have been performed to probe the structural variations genera

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22

Zolotarev, Yu A., A. K. Dadayan, V. S. Kozik, et al. "Solid phase isotope exchange of deuterium and tritium for hydrogen in human recombinant insulin." Russian Journal of Bioorganic Chemistry 40, no. 1 (2014): 26–35. http://dx.doi.org/10.1134/s1068162014010154.

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23

Mizuno, Masayasu, and Michael J. Pikal. "Is the pre-Tg DSC endotherm observed with solid state proteins associated with the protein internal dynamics? Investigation of bovine serum albumin by solid state hydrogen/deuterium exchange." European Journal of Pharmaceutics and Biopharmaceutics 85, no. 2 (2013): 170–76. http://dx.doi.org/10.1016/j.ejpb.2013.04.019.

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24

Moorthy, Balakrishnan S., Steven G. Schultz, Sherry G. Kim, and Elizabeth M. Topp. "Predicting Protein Aggregation during Storage in Lyophilized Solids Using Solid State Amide Hydrogen/Deuterium Exchange with Mass Spectrometric Analysis (ssHDX-MS)." Molecular Pharmaceutics 11, no. 6 (2014): 1869–79. http://dx.doi.org/10.1021/mp500005v.

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25

Hossain, Belal M., Douglas A. Simmons, and Lars Konermann. "Do electrospray mass spectra reflect the ligand binding state of proteins in solution?" Canadian Journal of Chemistry 83, no. 11 (2005): 1953–60. http://dx.doi.org/10.1139/v05-194.

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Electrospray ionization (ESI) mass spectrometry (MS) has become a popular tool for monitoring ligandprotein and proteinprotein interactions. Due to the "gentle" nature of the ionization process, it is often possible to transfer weakly bound complexes into the gas phase, thus making them amenable to MS detection. One problem with this technique is the potential occurrence of fragmentation events during ESI. Also, some analytes tend to cluster together during ionization, thus forming nonspecific gas-phase assemblies that do not represent solution-phase complexes. In this work, we implemented a

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26

Kupka, Anna, Hermann Gies, and Klaus Merz. "Influence on Crystallisation Process of Amino Acids from Solution." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C546. http://dx.doi.org/10.1107/s2053273314094534.

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The famous Miller experiment to model the primordial soup demonstrated that amino acids can form spontaneously as the essential building blocks of life in solutions. It is, however, still an open question how self-recognition processes influence the transformation of these spontaneously formed amino acids in solvents into higher ordered structures in the solid state, thereby creating chiral materials and catalytically competent structures. The understanding of the first steps of molecular self-assembly processes in such environments will thus give important clues towards the understanding of b

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27

Kong, Leopold, Chih-chin Huang, Stephen J. Coales, et al. "Local Conformational Stability of HIV-1 gp120 in Unliganded and CD4-Bound States as Defined by Amide Hydrogen/Deuterium Exchange." Journal of Virology 84, no. 19 (2010): 10311–21. http://dx.doi.org/10.1128/jvi.00688-10.

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ABSTRACT The binding reaction of the HIV-1 gp120 envelope glycoprotein to the CD4 receptor involves exceptional changes in enthalpy and entropy. Crystal structures of gp120 in unliganded and various ligand-bound states, meanwhile, reveal an inner domain able to fold into diverse conformations, a structurally invariant outer domain, and, in the CD4-bound state, a bridging sheet minidomain. These studies, however, provide only hints as to the flexibility of each state. Here we use amide hydrogen/deuterium exchange coupled to mass spectrometry to provide quantifications of local conformational st

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28

Alluri, Ravi Kumar, Nicholas Arce, Philip Klenotic та ін. "Characterization of Recombinant β2GPI Using Hydrogen-Deuterium Exchange and X-Ray Crystallography". Blood 134, Supplement_1 (2019): 1105. http://dx.doi.org/10.1182/blood-2019-131386.

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Introduction: Antiphospholipid syndrome (APS) is an autoimmune disorder caused by "antiphospholipid" antibodies (aPL) directed against β2-glycoprotein I (β2GPI). However, there remains significant inconsistency in measurements of anti-β2GPI antibodies, possibly due to different sources of β2GPI. To address this issue and others, we have developed a system in which recombinant β2GPI (rβ2GPI) is expressed in mammalian (HEK293) cells using a lentiviral construct with a CMV promoter, in which the signal peptide of β2GPI has been mutated. In previous work, we demonstrated that patient-derived anti-

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29

Zhou, Crystal, Anindya Sarkar, and Patrick L. Wintrode. "Native State Dynamics of Human Neuroserpin Investigated with Hydrogen/Deuterium Exchange and Molecular Dynamics Simulations." Biophysical Journal 100, no. 3 (2011): 50a. http://dx.doi.org/10.1016/j.bpj.2010.12.469.

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30

Dajnowicz, Steven, Sean Seaver, B. Leif Hanson, et al. "Visualizing the Bohr effect in hemoglobin: neutron structure of equine cyanomethemoglobin in the R state and comparison with human deoxyhemoglobin in the T state." Acta Crystallographica Section D Structural Biology 72, no. 7 (2016): 892–903. http://dx.doi.org/10.1107/s2059798316009049.

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Neutron crystallography provides direct visual evidence of the atomic positions of deuterium-exchanged H atoms, enabling the accurate determination of the protonation/deuteration state of hydrated biomolecules. Comparison of two neutron structures of hemoglobins, human deoxyhemoglobin (T state) and equine cyanomethemoglobin (R state), offers a direct observation of histidine residues that are likely to contribute to the Bohr effect. Previous studies have shown that the T-state N-terminal and C-terminal salt bridges appear to have a partial instead of a primary overall contribution. Four conser

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31

Lin, Yu, Tobias Arlt, Nikolay Kardjilov, Ingo Manke, and Werner Lehnert. "In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method." Energies 11, no. 9 (2018): 2214. http://dx.doi.org/10.3390/en11092214.

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In order to characterize high temperature polymer electrolyte fuel cells (HT-PEFCs) in operando, neutron radiography imaging, in combination with the deuterium contrast method, was used to analyze the hydrogen distribution and proton exchange processes in operando. These measurements were then combined with the electrochemical impedance spectroscopy measurements. The cell was operated under different current densities and stoichiometries. Neutron images of the active area of the cell were captured in order to study the changeover times when the fuel supply was switched between hydrogen and deu

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32

Moussa, Ehab M., Satish K. Singh, Michael Kimmel, Sandeep Nema, and Elizabeth M. Topp. "Probing the Conformation of an IgG1 Monoclonal Antibody in Lyophilized Solids Using Solid-State Hydrogen–Deuterium Exchange with Mass Spectrometric Analysis (ssHDX-MS)." Molecular Pharmaceutics 15, no. 2 (2018): 356–68. http://dx.doi.org/10.1021/acs.molpharmaceut.7b00696.

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33

Kumar, Lokesh, Karthik Balakrishna Chandrababu, Shenbaga Moorthy Balakrishnan, et al. "Optimizing the Formulation and Lyophilization Process for a Fragment Antigen Binding (Fab) Protein Using Solid-State Hydrogen–Deuterium Exchange Mass Spectrometry (ssHDX-MS)." Molecular Pharmaceutics 16, no. 11 (2019): 4485–95. http://dx.doi.org/10.1021/acs.molpharmaceut.9b00614.

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34

Wilson, Nathan E., Elizabeth M. Topp, and Qi Tony Zhou. "Effects of drying method and excipient on structure and stability of protein solids using solid-state hydrogen/deuterium exchange mass spectrometry (ssHDX-MS)." International Journal of Pharmaceutics 567 (August 2019): 118470. http://dx.doi.org/10.1016/j.ijpharm.2019.118470.

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35

Kabaria, Sneha R., Ian Mangion, Alexey A. Makarov, and Gregory F. Pirrone. "Use of MALDI-MS with solid-state hydrogen deuterium exchange for semi-automated assessment of peptide and protein physical stability in lyophilized solids." Analytica Chimica Acta 1054 (April 2019): 114–21. http://dx.doi.org/10.1016/j.aca.2018.12.034.

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36

Belva, Hélène, Catherine Lange та Isabelle Segalas. "Conformational Properties of α-Dendrotoxin Using Electrospray Mass Spectrometry". European Journal of Mass Spectrometry 7, № 4-5 (2001): 373–83. http://dx.doi.org/10.1255/ejms.447.

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To examine the conformation of α-dendrotoxin, charge state distributions (CSD)and hydrogen/deuterium (H/D)isotopic exchange using electrospray-ionization mass spectrometry [ES-MS] have been used. Here, it cannot be deduced from the CSDs that some basic residues are hidden in the core of the structure. At neutral pH, the CSDs reflect the equilibrium bulk solution exactly. Seven basic residues seem to be shielded from the solvent, according to calculations from the X-ray structure. But, under acidic conditions, the CSDs observed in mass spectra are not a true reflection of the equilibrium bulk s

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37

Yi, Qian, and David Baker. "Direct evidence for a two-state protein unfolding transition from hydrogen-deuterium exchange, mass spectrometry, and NMR." Protein Science 5, no. 6 (1996): 1060–66. http://dx.doi.org/10.1002/pro.5560050608.

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38

Liu, Yu-Hong, and Lars Konermann. "Enzyme conformational dynamics during catalysis and in the ‘resting state’ monitored by hydrogen/deuterium exchange mass spectrometry." FEBS Letters 580, no. 22 (2006): 5137–42. http://dx.doi.org/10.1016/j.febslet.2006.08.042.

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39

Hand, Owen W., Asoka Ranasinghe, and R. Graham Cooks. "Chemical reactions at interfaces: Hydrogen-deuterium exchange using a solid ND4Cl matrix in molecular secondary ion mass spectrometry." Organic Mass Spectrometry 28, no. 3 (1993): 176–84. http://dx.doi.org/10.1002/oms.1210280308.

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40

Lin, Hui, and Chhabil Dass. "A Mass Spectrometry Investigation of the Conformational Changes in Adrenocorticotropic Hormones." European Journal of Mass Spectrometry 8, no. 5 (2002): 381–87. http://dx.doi.org/10.1255/ejms.513.

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Electrospray ionization-mass spectrometry (ESI-MS) was employed to study methanol-induced conformational changes in adrenocorticotrophic hormone (ACTH). ACTH, a 39–residue peptide, is a member of the proopiomelanocortin family of peptides. Charge-state distribution (CSD) and hydrogen–deuterium (H/D) exchange were used to monitor the conformational changes as a function of methanol concentration. The latter experiments were conducted via time-resolved ESI-MS in a continuous-flow apparatus. The CSD and the H/D exchange experimental data both reveal that ACTH exists, presumably in a random coil o

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41

Fang, Rui, Pawel J. Grobelny, Robin H. Bogner, and Michael J. Pikal. "Protein Internal Dynamics Associated With Pre–System Glass Transition Temperature Endothermic Events: Investigation of Insulin and Human Growth Hormone by Solid State Hydrogen/Deuterium Exchange." Journal of Pharmaceutical Sciences 105, no. 11 (2016): 3290–95. http://dx.doi.org/10.1016/j.xphs.2016.07.028.

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42

Baron, Marie-Hélène, Sabine Halut-Desportes, Hai-Fen Ye, Jack Huet, and Edith Favre. "Spectroscopic conformational study of PMS 952, a specific imidazoline ligand. Experimental results." Canadian Journal of Chemistry 77, no. 12 (1999): 2015–24. http://dx.doi.org/10.1139/v99-191.

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X-ray analysis of PMS 952 displays two kinds of very strong hydrogen bonds, an intramolecular one stabilizing the conformer A and an intermolecular one that associates conformers A to form two infinite chains. The 1H NMR study of vicinal coupling constants based on dihedral angle values, evidences that PMS 952 takes up an eclipsed conformation, in CCl4 and CDCl3 solutions, closely related to the conformation in solid state. Deuterium exchange in methanol-d4 points out the presence of a tautomeric form. However, as there is spectral evidence neither from NMR nor from FTIR studies for such a tau

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43

Maki, K., T. Endo, and K. Kuwajima. "1P092 NMR resonance assignments and native-state hydrogen/deuterium exchange of a proline-free variant of staphylococcal nuclease." Seibutsu Butsuri 45, supplement (2005): S54. http://dx.doi.org/10.2142/biophys.45.s54_4.

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44

Maier, Claudia S., Ok-Hee Kim, and Max L. Deinzer. "Conformational Properties of the A-State of Cytochrome c Studied by Hydrogen/Deuterium Exchange and Electrospray Mass Spectrometry." Analytical Biochemistry 252, no. 1 (1997): 127–35. http://dx.doi.org/10.1006/abio.1997.2290.

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45

Sipilä, O., P. Caselli, and J. Harju. "Modeling deuterium chemistry in starless cores: full scrambling versus proton hop." Astronomy & Astrophysics 631 (October 22, 2019): A63. http://dx.doi.org/10.1051/0004-6361/201936416.

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We constructed two new models for deuterium and spin-state chemistry for the purpose of modeling the low-temperature environment prevailing in starless and pre-stellar cores. The fundamental difference between the two models is in the treatment of ion-molecule proton-donation reactions of the form XH+ + Y → X + YH+, which are allowed to proceed either via full scrambling or via direct proton hop, that is, disregarding proton exchange. The choice of the reaction mechanism affects both deuterium and spin-state chemistry, and in this work our main interest is on the effect on deuterated ammonia.

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46

Purves, Randy W., Barbara Ells, David A. Barnett, and Roger Guevremont. "Combining HD exchange and ESI-FAIMS-MS for detecting gas-phase conformers of equine cytochrome c." Canadian Journal of Chemistry 83, no. 11 (2005): 1961–68. http://dx.doi.org/10.1139/v05-215.

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Conformers of equine cytochrome c were investigated in the gas phase using a combination of high-field asymmetric waveform ion mobility spectrometry (FAIMS) and hydrogendeuterium (HD) exchange. Electrospray generated ions of equine cytochrome c were exposed to a low concentration of D2O vapour while being transported by a flow of nitrogen through a FAIMS device. During this transport period of about 250 ms in the FAIMS analyzer, the various conformers of multiply charged ions of cytochrome c were simultaneously undergoing HD exchange and being separated from each other. The extent of HD ex

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47

Wan, Hongbin, Yunhui Ge, Asghar Razavi, and Vincent A. Voelz. "Reconciling Simulated Ensembles of Apomyoglobin with Experimental Hydrogen/Deuterium Exchange Data Using Bayesian Inference and Multiensemble Markov State Models." Journal of Chemical Theory and Computation 16, no. 2 (2020): 1333–48. http://dx.doi.org/10.1021/acs.jctc.9b01240.

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48

Alomirah, Husam, Inteaz Alli та Yasuo Konishi. "Charge State Distribution and Hydrogen/Deuterium Exchange of α-Lactalbumin and β-Lactoglobulin Preparations by Electrospray Ionization Mass Spectrometry". Journal of Agricultural and Food Chemistry 51, № 7 (2003): 2049–57. http://dx.doi.org/10.1021/jf020816e.

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49

Stefanowicz, Piotr, Inga Petry-Podgorska, Karolina Kowalewska, Lukasz Jaremko, Mariusz Jaremko, and Zbigniew Szewczuk. "Electrospray ionization mass spectrometry as a method for studying the high-pressure denaturation of proteins." Bioscience Reports 30, no. 2 (2009): 91–99. http://dx.doi.org/10.1042/bsr20090015.

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High-pressure denaturation of proteins can provide important information concerning their folding and function. These studies require expensive and complicated equipment. In this paper, we present a new convenient method for studying high-pressure denaturation of proteins combining DHX (deuterium–hydrogen exchange) and electrospray ionization MS. Application of various values of pressure causes different degrees of protein unfolding resulting in molecules with a different number of protons available for exchange with deuterons. After decompression a protein refolds and a certain number of deut

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50

Zhang, Jianyu, Jeremy L. Balsbaugh, Shuaihua Gao, Natalie G. Ahn, and Judith P. Klinman. "Hydrogen deuterium exchange defines catalytically linked regions of protein flexibility in the catechol O-methyltransferase reaction." Proceedings of the National Academy of Sciences 117, no. 20 (2020): 10797–805. http://dx.doi.org/10.1073/pnas.1917219117.

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Abstract:

Human catechol O-methyltransferase (COMT) has emerged as a model for understanding enzyme-catalyzed methyl transfer from S-adenosylmethionine (AdoMet) to small-molecule catecholate acceptors. Mutation of a single residue (tyrosine 68) behind the methyl-bearing sulfonium of AdoMet was previously shown to impair COMT activity by interfering with methyl donor–acceptor compaction within the activated ground state of the wild type enzyme [J. Zhang, H. J. Kulik, T. J. Martinez, J. P. Klinman, Proc. Natl. Acad. Sci. U.S.A. 112, 7954–7959 (2015)]. This predicts the involvement of spatially defined pro

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