1
|
Michaelis VK, Keeler EG, Ong TC, Craigen KN, Penzel S, Wren JEC, Kroeker S, Griffin RG. Structural Insights into Bound Water in Crystalline Amino Acids: Experimental and Theoretical (17)O NMR. J Phys Chem B 2015; 119:8024-36. [PMID: 25996165 PMCID: PMC4894719 DOI: 10.1021/acs.jpcb.5b04647] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate here that the (17)O NMR properties of bound water in a series of amino acids and dipeptides can be determined with a combination of nonspinning and magic-angle spinning experiments using a range of magnetic field strengths from 9.4 to 21.1 T. Furthermore, we propose a (17)O chemical shift fingerprint region for bound water molecules in biological solids that is well outside the previously determined ranges for carbonyl, carboxylic, and hydroxyl oxygens, thereby offering the ability to resolve multiple (17)O environments using rapid one-dimensional NMR techniques. Finally, we compare our experimental data against quantum chemical calculations using GIPAW and hybrid-DFT, finding intriguing discrepancies between the electric field gradients calculated from structures determined by X-ray and neutron diffraction.
Collapse
Affiliation(s)
- Vladimir K. Michaelis
- Department of Chemistry and Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA
| | - Eric G. Keeler
- Department of Chemistry and Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA
| | - Ta-Chung Ong
- Department of Chemistry and Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA
| | - Kimberley N. Craigen
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - Susanne Penzel
- Department of Chemistry and Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA
| | - John E. C. Wren
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - Scott Kroeker
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2 Canada
| | - Robert G. Griffin
- Department of Chemistry and Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA
| |
Collapse
|
2
|
Abstract
![]()
Myoglobin
(Mb) binds diatomic ligands, like O2, CO,
and NO, in a cavity that is only transiently accessible. Crystallography
and molecular simulations show that the ligands can migrate through
an extensive network of transiently connected cavities but disagree
on the locations and occupancy of internal hydration sites. Here,
we use water 2H and 17O magnetic relaxation
dispersion (MRD) to characterize the internal water molecules in Mb
under physiological conditions. We find that equine carbonmonoxy Mb
contains 4.5 ± 1.0 ordered internal water molecules with a mean
survival time of 5.6 ± 0.5 μs at 25 °C. The likely
locations of these water molecules are the four polar hydration sites,
including one of the xenon-binding cavities, that are fully occupied
in all high-resolution crystal structures of equine Mb. The finding
that water escapes from these sites, located 17–31 Å apart
in the protein, on the same μs time scale suggests a global
exchange mechanism. We propose that this mechanism involves transient
penetration of the protein by H-bonded water chains. Such a mechanism
could play a functional role by eliminating trapped ligands. In addition,
the MRD results indicate that 2 or 3 of the 11 histidine residues
of equine Mb undergo intramolecular hydrogen exchange on a μs
time scale.
Collapse
Affiliation(s)
- Shuji Kaieda
- Department of Biophysical Chemistry, Lund University , P.O. Box 124, SE-22100 Lund, Sweden
| | | |
Collapse
|
3
|
Esrafili MD. Intra- and inter-molecular interactions in salicylic acid — Theoretical calculations of 17O and 1H chemical shielding tensors and QTAIM analysis. CAN J CHEM 2011. [DOI: 10.1139/v11-105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A density functional theory (DFT) study was performed to examine intra- and inter-molecular hydrogen bond (HB) properties in crystalline salicylic acid (SA). BLYP, B3LYP, and M06 functionals with 6–311++G** basis set were employed to calculate NMR chemical shielding isotropy (σiso) and anisotropy (Δσ) at the sites of the 17O and 1H nuclei of SA. From this study, it appears that the intra- and inter-molecular O–H···O as well as C–H···O HBs around the SA molecule in the crystal lattice have a major influence on the chemical shielding tensors and more specifically on the carbonyl 17O isotropy value. The quantum theory of atoms in molecules (QTAIM) analysis was also employed to elucidate the interaction characteristics in SA H-bonded network. Based on QTAIM results, a partial covalent character is attributed to the intra- and inter-molecular O–H···O HBs in SA.
Collapse
Affiliation(s)
- Mehdi D. Esrafili
- Laboratory of Theoretical Chemistry, Department of Chemistry, University of Maragheh, Maragheh, Iran
| |
Collapse
|
4
|
Aroulanda C, Lafon O, Lesot P. Enantiodiscrimination of Flexible Cyclic Solutes Using NMR Spectroscopy in Polypeptide Chiral Mesophases: Investigation of cis-Decalin and THF. J Phys Chem B 2009; 113:10628-40. [DOI: 10.1021/jp902233m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Christie Aroulanda
- Méthodologie RMN, UMR CNRS-UHP 7036, Institut Jean Barriol, Faculté des Sciences, Nancy-Université, BP 70239, 54506 Vandoeuvre-lès-Nancy cedex, France, Unité de catalyse et de chimie du solide (UCCS), UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Université de Lille 1, Bât. C7, BP 90108, 59652 Villeneuve d’Ascq cedex, France, and Laboratoire de Chimie Structurale Organique, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Université Paris Sud 11, Bât. 410, 91405 Orsay cedex, France
| | - Olivier Lafon
- Méthodologie RMN, UMR CNRS-UHP 7036, Institut Jean Barriol, Faculté des Sciences, Nancy-Université, BP 70239, 54506 Vandoeuvre-lès-Nancy cedex, France, Unité de catalyse et de chimie du solide (UCCS), UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Université de Lille 1, Bât. C7, BP 90108, 59652 Villeneuve d’Ascq cedex, France, and Laboratoire de Chimie Structurale Organique, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Université Paris Sud 11, Bât. 410, 91405 Orsay cedex, France
| | - Philippe Lesot
- Méthodologie RMN, UMR CNRS-UHP 7036, Institut Jean Barriol, Faculté des Sciences, Nancy-Université, BP 70239, 54506 Vandoeuvre-lès-Nancy cedex, France, Unité de catalyse et de chimie du solide (UCCS), UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Université de Lille 1, Bât. C7, BP 90108, 59652 Villeneuve d’Ascq cedex, France, and Laboratoire de Chimie Structurale Organique, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Université Paris Sud 11, Bât. 410, 91405 Orsay cedex, France
| |
Collapse
|
5
|
Chapman RP, Bryce DL. A high-field solid-state 35/37Cl NMR and quantum chemical investigation of the chlorine quadrupolar and chemical shift tensors in amino acid hydrochlorides. Phys Chem Chem Phys 2007; 9:6219-30. [DOI: 10.1039/b712688c] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|