The proposed research represents a novel application of low temperature (10K) solid-state 67Zn and 25Mg NMR applied to proteins and their model systems. The principal aim for the proposed research is to continue our efforts in establishing a relationship between 67Zn and 25Mg magnetic resonance parameters (quadrupole coupling constants, shielding tensors and their relative orientations) and the structure/function relationships for known Zn- and Mg-metalloproteins and extrapolating those relationships to proteins where the role of the metal is less defined. These experiments are performed in concert with ab initio electronic structure calculations. The combination of these two methods provides a firm basis for the """"""""chemical"""""""" understanding of the role these metals play in their respective proteins. Additionally, triple resonance experiments (1H, [15N or 31P], [25Mg through 67Zn]) are proposed to facilitate the identity of neighboring ligands and the determination of selective bond distances between the metal of interest and the directly bonded atom of the ligand. The results of these experiments are critical for the mechanistic understanding of the role the metal plays in the protein of interest, e.g. Mg 2+ in E. coli alkaline phosphatase. ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Type
Research Project (R01)
Project #
5R01EB002050-27
Application #
7033848
Study Section
Metallobiochemistry Study Section (BMT)
Program Officer
Mclaughlin, Alan Charles
Project Start
1979-04-01
Project End
2008-02-29
Budget Start
2006-03-01
Budget End
2007-02-28
Support Year
27
Fiscal Year
2006
Total Cost
$681,365
Indirect Cost
Name
Battelle Pacific Northwest Laboratories
Department
Type
DUNS #
032987476
City
Richland
State
WA
Country
United States
Zip Code
99352
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Lipton, Andrew S; Morlok, Melissa M; Parkin, Gerard et al. (2008) 67Zn solid-state NMR spectroscopy of ([Tp But,Me]Zn(OH2))[HOB(C6F5)3]. the importance of the anion [HOB(C6F5)3]-. Inorg Chem 47:5184-9
Lipton, Andrew S; Heck, Robert W; Staeheli, Greg R et al. (2008) A QM/MM approach to interpreting 67Zn solid-state NMR data in zinc proteins. J Am Chem Soc 130:6224-30
Lipton, Andrew S; Ellis, Paul D (2007) Modeling the metal center of Cys4 zinc proteins. J Am Chem Soc 129:9192-200
Bowers, Geoffrey M; Lipton, Andrew S; Mueller, Karl T (2006) High-field QCPMG NMR of strontium nuclei in natural minerals. Solid State Nucl Magn Reson 29:95-103
Lipton, Andrew S; Heck, Robert W; Ellis, Paul D (2004) Zinc solid-state NMR spectroscopy of human carbonic anhydrase: implications for the enzymatic mechanism. J Am Chem Soc 126:4735-9