Many nucleic acids and proteins require divalent metal ions such as Mg2+ and Ca2+ for folding and function. The lipophilic alignment media frequently used as membrane mimetics also bind these divalent metals. Here we demonstrate the use of 31P NMR spectrum of a metal ion chelator (deoxycytidine diphosphate) to measure the bound [Mg2+] and [Ca2+] in situ for several biological model systems at relatively high divalent ion concentrations (1â??10Â*mM). This method represents a general approach to measuring divalent metal ion binding in NMR samples where the amount and type of metal ion added to the system is known.
In Situ and Ex Situ Low-Field NMR Spectroscopy and MRI Endowed by SABRE Hyperpolarization
From The DNP-NMR Blog:
In Situ and Ex Situ Low-Field NMR Spectroscopy and MRI Endowed by SABRE Hyperpolarization
Barskiy, D.A., et al., In Situ and Ex Situ Low-Field NMR Spectroscopy and MRI Endowed by SABRE Hyperpolarization. ChemPhysChem, 2014. 15(18): p. 4100-7.
http://www.ncbi.nlm.nih.gov/pubmed/25367202
[NMR paper] Direct Measurement of the Mn(II) Hydration State in Metal Complexes and Metalloproteins Through 17O NMR Linewidths.
Direct Measurement of the Mn(II) Hydration State in Metal Complexes and Metalloproteins Through 17O NMR Linewidths.
Direct Measurement of the Mn(II) Hydration State in Metal Complexes and Metalloproteins Through 17O NMR Linewidths.
J Am Chem Soc. 2013 Oct 3;
Authors: Gale EM, Zhu J, Caravan P
Abstract
Here we describe a simple method to estimate the inner-sphere hydration state of the Mn(II) ion in coordination complexes and metalloproteins. The linewidth of bulk H217O is measured in the presence and absence of Mn(II) as a function...
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10-04-2013 05:23 PM
[NMR paper] Solution NMR refinement of a metal ion bound protein using metal ion inclusive restrained molecular dynamics methods.
Solution NMR refinement of a metal ion bound protein using metal ion inclusive restrained molecular dynamics methods.
Related Articles Solution NMR refinement of a metal ion bound protein using metal ion inclusive restrained molecular dynamics methods.
J Biomol NMR. 2013 Apr 23;
Authors: Chakravorty DK, Wang B, Lee CW, Guerra AJ, Giedroc DP, Merz KM
Abstract
Correctly calculating the structure of metal coordination sites in a protein during the process of nuclear magnetic resonance (NMR) structure determination and refinement continues to...
High-Pressure in Situ 129Xe NMR Spectroscopy and Computer Simulations of Breathing Transitions in the Metal–Organic Framework Ni2(2,6-ndc)2(dabco) (DUT-8(Ni))
High-Pressure in Situ 129Xe NMR Spectroscopy and Computer Simulations of Breathing Transitions in the Metal–Organic Framework Ni2(2,6-ndc)2(dabco) (DUT-8(Ni))
Herbert C. Hoffmann, Bassem Assfour, Fanny Epperlein, Nicole Klein, Silvia Paasch, Irena Senkovska, Stefan Kaskel, Gotthard Seifert and Eike Brunner
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja201951t/aop/images/medium/ja-2011-01951t_0001.gif
Journal of the American Chemical Society
DOI: 10.1021/ja201951t
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA...
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05-16-2011 08:23 PM
[NMR paper] NMR studies of [U-13C]cyclosporin A bound to cyclophilin: bound conformation and port
NMR studies of cyclosporin A bound to cyclophilin: bound conformation and portions of cyclosporin involved in binding.
Related Articles NMR studies of cyclosporin A bound to cyclophilin: bound conformation and portions of cyclosporin involved in binding.
Biochemistry. 1991 Jul 2;30(26):6574-83
Authors: Fesik SW, Gampe RT, Eaton HL, Gemmecker G, Olejniczak ET, Neri P, Holzman TF, Egan DA, Edalji R, Simmer R
Cyclosporin A (CsA), a potent immunosuppressant, is known to bind with high specificity to cyclophilin (CyP), a 17.7 kDa protein with...
In situ NMR measurement of macromolecule-bound metal ion concentrations
Linear Mode
