Differentiation of the binding of two ligands to a tetrameric protein with a single symmetric active site by 19F NMR
Differentiation of the binding of two ligands to a tetrameric protein with a single symmetric active site by 19F NMR
Abstract
R67 dihydrofolate reductase (R67 DHFR) is a plasmid-encoded enzyme that confers resistance to the antibacterial drug trimethoprim. R67 DHFR is a tetramer with a single active site that is unusual as both cofactor and substrate are recognized by symmetry-related residues. Such promiscuity has limited our previous efforts to differentiate ligand binding by NMR. To address this problem, we incorporated fluorine at positions 4, 5, 6, or 7 of the indole rings of...
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01-28-2021 02:26 AM
Differentiation of the binding of two ligands to a tetrameric protein with a single symmetric active site by 19F NMR
Differentiation of the binding of two ligands to a tetrameric protein with a single symmetric active site by 19F NMR
Abstract
R67 dihydrofolate reductase (R67 DHFR) is a plasmid-encoded enzyme that confers resistance to the antibacterial drug trimethoprim. R67 DHFR is a tetramer with a single active site that is unusual as both cofactor and substrate are recognized by symmetry-related residues. Such promiscuity has limited our previous efforts to differentiate ligand binding by NMR. To address this problem, we incorporated fluorine at positions 4, 5, 6, or 7 of the indole rings of...
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12-12-2020 06:54 PM
[NMR paper] Revealing Conformational Variants of Solution-Phase Intrinsically Disordered Tau Protein at the Single-Molecule Level
Revealing Conformational Variants of Solution-Phase Intrinsically Disordered Tau Protein at the Single-Molecule Level
Intrinsically disordered proteins, such as tau protein, adopt a variety of conformations in solution, complicating solution-phase structural studies. We employ an anti-Brownian electrokinetic (ABEL) trap to prolong measurements of single tau proteins in solution. Once trapped, we record the fluorescence anisotropy to investigate the diversity of conformations sampled by the single molecules. A distribution of anisotropy values obtained from trapped tau protein is...
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10-24-2017 05:09 PM
Direct dynamic nuclear polarization targeting catalytically active (27)Al sites
From The DNP-NMR Blog:
Direct dynamic nuclear polarization targeting catalytically active (27)Al sites
Lund, A., et al., Direct dynamic nuclear polarization targeting catalytically active (27)Al sites. Phys Chem Chem Phys, 2015. 17(38): p. 25449-54.
http://www.ncbi.nlm.nih.gov/pubmed/26365719
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01-20-2016 11:54 PM
[NMR paper] Solution NMR characterization of magnetic/electronic properties of azide and cyanide-inhibited substrate complexes of human heme oxygenase: implications for steric ligand tilt.
Solution NMR characterization of magnetic/electronic properties of azide and cyanide-inhibited substrate complexes of human heme oxygenase: implications for steric ligand tilt.
http://www.bionmr.com//www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-PubMedLink.gif Related Articles Solution NMR characterization of magnetic/electronic properties of azide and cyanide-inhibited substrate complexes of human heme oxygenase: implications for steric ligand tilt.
J Inorg Biochem. 2013 Apr;121:179-86
Authors: Peng D, Ogura H, Ma...
Influence of substrate modification and C-terminal truncation on the active site structure of substrate-bound heme oxygenase from Neisseriae meningitidis; A 1H NMR study.
Influence of substrate modification and C-terminal truncation on the active site structure of substrate-bound heme oxygenase from Neisseriae meningitidis; A 1H NMR study.
Influence of substrate modification and C-terminal truncation on the active site structure of substrate-bound heme oxygenase from Neisseriae meningitidis; A 1H NMR study.
Biochemistry. 2011 Aug 27;
Authors: Peng D, Satterlee JD, Ma LH, Dallas JL, Smith KM, Zhang X, Sato M, La Mar GN
Abstract
Heme oxygenase, HO, from the pathogenic bacterium N. meningitidis, NmHO, which...
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08-30-2011 04:52 PM
[NMR paper] NMR structures of three single-residue variants of the human prion protein.
NMR structures of three single-residue variants of the human prion protein.
Related Articles NMR structures of three single-residue variants of the human prion protein.
Proc Natl Acad Sci U S A. 2000 Jul 18;97(15):8340-5
Authors: Calzolai L, Lysek DA, Guntert P, von Schroetter C, Riek R, Zahn R, Wüthrich K
The NMR structures of three single-amino acid variants of the C-terminal domain of the human prion protein, hPrP(121-230), are presented. In hPrP(M166V) and hPrP(R220K) the substitution is with the corresponding residue in murine PrP, and in...