Search Results - "Tatjana Kh. Shokhireva"

Electrochemical and NMR Spectroscopic Studies of Distal Pocket Mutants of Nitrophorin 2: Stability, Structure, and Dynamics of Axial Ligand Complexes by Tatjana Kh. Shokhireva, Berry, Robert E., Uno, Elizabeth, Balfour, Celia A., Zhang, Hongjun, Walker, F. Ann

“…WT and leucine → valine distal pocket mutants of nitrophorin 2 (NP2) and their NO complexes have been investigated by spectroelectrochemistry. NO complexes of…”
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Heme-Assisted S-Nitrosation of a Proximal Thiolate in a Nitric Oxide Transport Protein by Weichsel, Andrzej, Maes, Estelle M., Andersen, John F., Valenzuela, Jesus G., Tatjana Kh. Shokhireva, Walker, F. Ann, Montfort, William R., Ignarro, Louis J.

“…Certain bloodsucking insects deliver nitric oxide (NO) while feeding, to induce vasodilation and inhibit blood coagulation. We have expressed, characterized,…”
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Kinetics and Equilibria in Ligand Binding by Nitrophorins 1−4:  Evidence for Stabilization of a Nitric Oxide−Ferriheme Complex through a Ligand-Induced Conformational Trap by Andersen, John F, Ding, Xiao D, Balfour, Celia, Shokhireva, Tatjana Kh, Champagne, Donald E, Walker, F. Ann, Montfort, William R

“…Nitrophorins 1−4 (NP1−4) are ferriheme proteins from the blood-sucking insect Rhodnius prolixus that transport nitric oxide (NO) to the victim, sequester…”
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Chloroiron meso-triphenylcorrolates: electronic ground state and spin delocalization by Cai, Sheng, Licoccia, Silvia, D'Ottavi, Cadia, Paolesse, Roberto, Nardis, Sara, Bulach, Véronique, Zimmer, Bertrand, Shokhireva, Tatjana Kh, Ann Walker, F.

“…Four chloroiron meso-triphenyl-substituted corrolates have been synthesized and studied by 1H NMR spectroscopy. As in the case of the…”
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Two Crystalline Forms of Low-Spin [Fe(TMP)(5-MeHIm)2]ClO4. Relative Parallel and Perpendicular Axial Ligand Orientations by Munro, Orde Q, Serth-Guzzo, Judith A, Turowska-Tyrk, Ilona, Mohanrao, K, Shokhireva, Tatjana Kh, Walker, F. Ann, Debrunner, Peter G, Scheidt, W. Robert

“…The preparation and characterization of two crystalline forms of [Fe(TMP)(5-MeHIm)2]ClO4 with distinctly different molecular structures are reported. Crystal…”
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Electronic Effects in Transition Metal Porphyrins. 10. Effect of Ortho Substituents on the Temperature Dependence of the NMR Spectra of a Series of Spin-Admixed Perchloratoiron(III) Tetrakis(2,6- or 2,4,6-phenyl substituted)porphyrinates by Nesset, Marlys J. M., Cai, Sheng, Shokhireva, Tatjana Kh, Shokhirev, Nikolai V., Jacobson, Simone E., Jayaraj, K., Gold, Avram, Walker, F. Ann

“…The perchloratoiron(III) complexes of a series of 2,6-disubstituted tetraphenylporphyrin ligands, where the 2,6-phenyl substituents were −H, −F, −Cl, −Br, or…”
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Models of the Low-Spin Iron(III) Hydroperoxide Intermediate of Heme Oxygenase:  Magnetic Resonance Evidence for Thermodynamic Stabilization of the dxy Electronic State at Ambient Temperatures by RIVERA, Mario, CAIGNAN, Gregori A., ASTASHKIN, Andrei V., RAITSIMRING, Arnold M., SHOKHIREVA, Tatjana Kh, WALKER, F. Ann

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Rates of axial ligand rotation in diamagnetic d6 Co(III) and Fe(II) porphyrinates by Polam, Jayapal Reddy, Shokhireva, Tatjana Kh, Raffii, Kamran, Simonis, Ursula, Walker, F.Ann

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2D NMR Investigations of the Rotation of Axial Ligands in Six-Coordinate Low-Spin Iron(III) and Cobalt(III) Tetraphenylporphyrinates Having 2,6-Disubstituted Phenyl Rings:  Quantitation of Rate Constants from 1H EXSY Cross-Peak Intensities by Shokhirev, Nikolai V, Shokhireva, Tatjana Kh, Polam, Jayapal Reddy, Watson, C. Todd, Raffii, Kamran, Simonis, Ursula, Walker, F. Ann

“…Phase-sensitive NOESY/EXSY experiments have been utilized to measure the rates of axial ligand rotation for (tetramesitylporphyrinato)iron(III) and…”
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Scanning chimeragenesis: the approach used to change the substrate selectivity of fatty acid monooxygenase CYP102A1 to that of terpene ω-hydroxylase CYP4C7 by Chen, Chiung-Kuang J, Berry, Robert E, Shokhireva, Tatjana Kh, Murataliev, Marat B, Zhang, Hongjung, Walker, F. Ann

“…CYP102A1 is a highly active, water-soluble, bacterial monooxygenase enzyme that contains both substrate-binding heme and diflavin reductase subunits, both in a…”
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Models of the low-spin iron(III) hydroperoxide intermediate of heme oxygenase: Magnetic resonance evidence for thermodynamic stabilization of the dxy electronic state at ambient temperatures by RIVERA, Mario, CAIGNAN, Gregori A, ASTASHKIN, Andrei V, RAITSIMRING, Arnold M, SHOKHIREVA, Tatjana Kh, WALKER, F. Ann

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Models of the low-spin iron(III) hydroperoxide intermediate of heme oxygenase: magnetic resonance evidence for thermodynamic stabilization of the d(xy) electronic state at ambient temperatures by Rivera, Mario, Caignan, Gregori A, Astashkin, Andrei V, Raitsimring, Arnold M, Shokhireva, Tatjana Kh, Walker, F Ann

“…The (13)C pulsed ENDOR and NMR study of [meso-(13)C-TPPFe(OCH(3))(OO(t)Bu)](-) performed in this work shows that although the unpaired electron in low-spin…”
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NMR and EPR Studies of Chloroiron(III) Tetraphenyl-chlorin and Its Complexes with Imidazoles and Pyridines of Widely Differing Basicities by Cai, Sheng, Shokhireva, Tatjana Kh, Lichtenberger, Dennis L, Walker, F. Ann

“…The NMR and EPR spectra of two bisimidazole and three bispyridine complexes of tetraphenylchlorinatoiron(III), [(TPC)Fe(L)2]+ (L = Im-d 4, 2-MeHIm, 4-Me2NPy,…”
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Nitric Oxide Binding to the Ferri- and Ferroheme States of Nitrophorin 1, a Reversible NO-Binding Heme Protein from the Saliva of the Blood-Sucking Insect, Rhodnius prolixus by Ding, Xiao D, Weichsel, Andrzej, Andersen, John F, Shokhireva, Tatjana Kh, Balfour, Celia, Pierik, Antonio J, Averill, Bruce A, Montfort, William R, Walker, F. Ann

“…The recombinant NO-binding heme protein, nitrophorin 1 (NP1) from the saliva of the blood-sucking insect, Rhodnius prolixus, has been studied by…”
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Pulsed EPR Characterization of the Low-Spin Iron(III) Porphyrinate Complexes with Phenyl Isocyanide Ligands Having the dxy Orbital Ground State by ASTASHKIN, Andrei V., RAITSIMRING, Arnold M., KENNEDY, Abigail R., SHOKHIREVA, Tatjana Kh, WALKER, F. Ann

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NMR and EPR Studies of Chloroiron(III) Tetraphenylchlorin and Its Complexes with Imidazoles and Pyridines of Widely Differing Basicities by Cai, Sheng, Shokhireva, Tatjana Kh, Lichtenberger, Dennis L., Walker, F. Ann

“…The NMR and EPR spectra of two bis-imidazole and three bis-pyridine complexes of tetraphenylchlorinatoiron(III), [(TPC)Fe(L) 2 ] + (L = Im- d 4 , 2-MeHIm, 4-Me…”
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Axial ligand complexes of the Rhodnius nitrophorins: reduction potentials, binding constants, EPR spectra, and structures of the 4-iodopyrazole and imidazole complexes of NP4 by Berry, Robert E, Ding, Xiao D, Shokhireva, Tatjana Kh, Weichsel, Andrzej, Montfort, William R, Walker, F Ann

“…Previously, we utilized 4-iodopyrazole (4IPzH) as a heavy atom derivative for the initial solution of the crystal structure of the nitrophorin from Rhodnius…”
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Assignment of Heme Resonances and Determination of the Electronic Structures of High- and Low-Spin Nitrophorin 2 by 1 H and 13 C NMR Spectroscopy:  An Explanation of the Order of Heme Methyl Resonances in High-Spin Ferriheme Proteins by Shokhireva, Tatjana Kh, Shokhirev, Nikolai V., Walker, F. Ann

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NMR investigations of the four nitrophorins from the blood-sucking insect rhodnius prolixus by Walker, F.Ann, Shokhireva, Tatjana Kh, Shokhirev, Nikolai V.

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Assignment of Heme Resonances and Determination of the Electronic Structures of High- and Low-Spin Nitrophorin 2 by 1H and 13C NMR Spectroscopy:  An Explanation of the Order of Heme Methyl Resonances in High-Spin Ferriheme Proteins by Shokhireva, Tatjana Kh, Shokhirev, Nikolai V, Walker, F. Ann

“…The 1H NMR resonances of the heme substituents of the low-spin Fe(III) form of nitrophorin 2, as its complexes with N-methylimidazole (NP2−NMeIm) and imidazole…”
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