Abstract

The exchange rate of the amide protons in staphylococcal nuclease H124L is being investigated. The kinetics of hydrogen exchange between solvent and protein are a powerful probe of the structure, dynamics and stability of proteins in solution, since even under conditions such that the native state is much more stable than the denatured state, the hydrogens on all but a few core peptide nitrogens will exchange with water. In interpreting the kinetics, the Linderstrom-Lang model of NH-exchange is applied, and an EX2 exchange mechanism is assumed. The opening rate is determined (the rate of conformational change from the """"""""closed"""""""" to the """"""""open"""""""" state from which the exchange is thought to take place) at a number of different pressures, and by calculating the dependence of the equilibrium position between the open and closed states on pressure, one can determine the change in partial molar volumes between the two states.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR002301-12
Application #
5223939
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
12
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Travers, Timothy; López, Cesar A; Van, Que N et al. (2018) Molecular recognition of RAS/RAF complex at the membrane: Role of RAF cysteine-rich domain. Sci Rep 8:8461
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Wijayatunga, Nadeeja N; Sams, Valerie G; Dawson, John A et al. (2018) Roux-en-Y gastric bypass surgery alters serum metabolites and fatty acids in patients with morbid obesity. Diabetes Metab Res Rev 34:e3045
Assadi-Porter, Fariba M; Reiland, Hannah; Sabatini, Martina et al. (2018) Metabolic Reprogramming by 3-Iodothyronamine (T1AM): A New Perspective to Reverse Obesity through Co-Regulation of Sirtuin 4 and 6 Expression. Int J Mol Sci 19:
Dominguez, Eddie; Zarnowski, Robert; Sanchez, Hiram et al. (2018) Conservation and Divergence in the Candida Species Biofilm Matrix Mannan-Glucan Complex Structure, Function, and Genetic Control. MBio 9:
Franco, Aldo; Dovell, Sanaz; Möller, Carolina et al. (2018) Structural plasticity of mini-M conotoxins - expression of all mini-M subtypes by Conus regius. FEBS J 285:887-902
Wales, Jessica A; Chen, Cheng-Yu; Breci, Linda et al. (2018) Discovery of stimulator binding to a conserved pocket in the heme domain of soluble guanylyl cyclase. J Biol Chem 293:1850-1864
Selen Alpergin, Ebru S; Bolandnazar, Zeinab; Sabatini, Martina et al. (2017) Metabolic profiling reveals reprogramming of lipid metabolic pathways in treatment of polycystic ovary syndrome with 3-iodothyronamine. Physiol Rep 5:
Mong, Surin K; Cochran, Frank V; Yu, Hongtao et al. (2017) Heterochiral Knottin Protein: Folding and Solution Structure. Biochemistry 56:5720-5725

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