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Abdel-Rahman M, Elmasry HM, Ahmed-Farid OA, Hegazy SM, Rezk MM. Neurological study on the effect of CeNPs and/or La Cl 3 on adult male albino rats. J Trace Elem Med Biol 2024; 81:127323. [PMID: 37890446 DOI: 10.1016/j.jtemb.2023.127323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/27/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023]
Abstract
Lanthanides are a group of 15 elements (8 heavy and 7 light) grouped for their proximity in the chemical and physical properties. Recently, this group of elements has received great attention because of their importance, and their entrance into many industrial technologies making the probability of the living organisms' exposure to it increase. The present study aims to study ability of cerium nanoparticles (CeNPs) or lanthanum (LaCl3) to cross the blood brain barrier also, investigate their neuro effect separately or together on some parameters in six brain areas (cortex, cerebellum, hippocampus, striatum, midbrain, and hypothalamus) of the adult male albino rats. The results showed the ability of both elements to distribute and accumulate in the different brain areas. Also, the results of CeNPs or LaCl3 treatment were in the same line where each element caused a significant decrease in norepinephrine (NE), dopamine (DA), serotonin (5-HT) and GABA accompanied with a significant increase in 5- hydroxyl indoleacetic acid (5-HIAA) glucose level. On the other hand, GSH and MDA showed a significant decrease after CeNPs treatment while, with LaCl3 treatment, MDA showed a significant increase in the different brain areas after 3 weeks of treatment. The coadministration of CeNPs and La Cl3 caused an ameliorating effect in all the tested parameters. In conclusion, from the previous studies the effects of lanthanides in the present study may be in part due to its effect on the release or turnover of neurotransmitters and insulin secretion. Finally, the ameliorative effect of CeNPs may be regarded as its high activity to scavenge the free radicals.
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Affiliation(s)
- Mona Abdel-Rahman
- Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo, Egypt.
| | - Heba M Elmasry
- Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo, Egypt.
| | - Omar A Ahmed-Farid
- Department of Physiology, National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Sherein M Hegazy
- Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo, Egypt
| | - Mohamed M Rezk
- Isotopes Department, Nuclear Materials Authority, Cairo, Egypt.
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2
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Neelakantan H, Vance V, Wang HYL, McHardy SF, Watowich SJ. Noncoupled Fluorescent Assay for Direct Real-Time Monitoring of Nicotinamide N-Methyltransferase Activity. Biochemistry 2017; 56:824-832. [DOI: 10.1021/acs.biochem.6b01215] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Harshini Neelakantan
- Department
of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Virginia Vance
- Department
of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Hua-Yu Leo Wang
- Center
for Innovative Drug Discovery, Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Stanton F. McHardy
- Center
for Innovative Drug Discovery, Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Stanley J. Watowich
- Department
of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555, United States
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3
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Vazin M, Huang PJJ, Matuszek Ż, Liu J. Biochemical Characterization of a Lanthanide-Dependent DNAzyme with Normal and Phosphorothioate-Modified Substrates. Biochemistry 2015; 54:6132-8. [DOI: 10.1021/acs.biochem.5b00691] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mahsa Vazin
- Department of Chemistry,
Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Po-Jung Jimmy Huang
- Department of Chemistry,
Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Żaneta Matuszek
- Department of Chemistry,
Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Juewen Liu
- Department of Chemistry,
Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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On the use of X-ray absorption spectroscopy to elucidate the structure of lutetium adenosine mono- and triphosphate complexes. Anal Bioanal Chem 2013; 406:1049-61. [PMID: 23727732 DOI: 10.1007/s00216-013-7053-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 05/02/2013] [Accepted: 05/07/2013] [Indexed: 10/26/2022]
Abstract
Although the physiological impact of the actinide elements as nuclear toxicants has been widely investigated for half a century, a description of their interactions with biological molecules remains limited. It is however of primary importance to better assess the determinants of actinide speciation in cells and more generally in living organisms to unravel the molecular processes underlying actinide transport and deposition in tissues. The biological pathways of this family of elements in case of accidental contamination or chronic natural exposure (in the case of uranium rich soils for instance) are therefore a crucial issue of public health and of societal impact. Because of the high chemical affinity of those actinide elements for phosphate groups and the ubiquity of such chemical functions in biochemistry, phosphate derivatives are considered as probable targets of these cations. Among them, nucleotides and in particular adenosine mono- (AMP) and triphosphate (ATP) nucleotides occur in more chemical reactions than any other compounds on the earth's surface, except water, and are therefore critical target molecules. In the present study, we are interested in trans-plutonium actinide elements, in particular americium and curium that are more rarely considered in environmental and bioaccumulation studies than early actinides like uranium, neptunium and plutonium. A first step in this strategy is to work with chemical analogues like lanthanides that are not radioactive and therefore allow extended physical chemical characterization to be conducted that are difficult to perform with radioactive materials. We describe herein the interaction of lutetium(III) with adenosine AMP and ATP. With AMP and ATP, insoluble amorphous compounds have been obtained with molar ratios of 1:2 and 1:1, respectively. With an excess of ATP, with 1:2 molar ratio, a soluble complex has been obtained. A combination of spectroscopic techniques (IR, NMR, ESI-MS, EXAFS) together with quantum chemical calculations has been implemented in order to assess the lutetium coordination arrangement for the two nucleotides. In all the complexes described in the article, the lutetium cation is coordinated by the phosphate groups of the nucleotide plus additional putative water molecules with various tridimensional arrangements. With AMP 1:2 and ATP 1:1 solid-state compounds, polynuclear complexes are assumed to be obtained. In contrast, with ATP 1:2 soluble compound, the Lu coordination sphere is saturated by two ATP ligands, and this favors the formation of a mononuclear complex. In order to further interpret the EXAFS data obtained at the Lu LIII edge, model structures have been calculated for the 1:1 and 1:2 ATP complexes. They are discussed and compared to the EXAFS best fit metrical parameters.
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Holland JG, Geiger FM. Y(III) interactions with guanine oligonucleotides covalently attached to aqueous/solid interfaces. J Phys Chem B 2013; 117:825-32. [PMID: 23231441 DOI: 10.1021/jp3105858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The binding of Y(III) ions to surface-immobilized single-stranded 20-mers of guanine was studied using the Eisenthal χ((3)) technique and AFM. The free energy of binding for Y(III) to the G(20) sequence was found to be -39.5(8) kJ/mol. Furthermore, yttrium binds much more strongly to surface-immobilized oligonucleotides than the divalent metals previously reported. At maximum surface coverage, Y(III) ion densities range between one to three ions bound per strand. Comparatively, Mg(II) binds to the G(20)-functionalized interface in much higher ion densities. This result may be explained, in part, by the larger hydration sphere radius of Y(III) compared to that of Mg(II). The ion loading and binding free energy results, in conjunction with other surface and bulk aqueous phase studies, suggest that a fully hydrated +2 or +3 yttrium ion binds to the oligonucleotides through an outer-sphere mechanism. Tapping mode AFM results indicate that oligonucleotide height does not appreciably decrease following Y(III) binding. These results, together with the low ion densities for Y(III) ions, indicate that Y(III) strand loading may not significantly decrease the intrastrand Coulombic repulsions in order to cause a significant decrease in oligomer height.
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Affiliation(s)
- Joseph G Holland
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
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Weitz EA, Chang JY, Rosenfield AH, Morrow EA, Pierre VC. The basis for the molecular recognition and the selective time-gated luminescence detection of ATP and GTP by a lanthanide complex. Chem Sci 2013. [DOI: 10.1039/c3sc51583d] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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7
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Hong J, Pei D, Guo X. Quantum dot-Eu3+ conjugate as a luminescence turn-on sensor for ultrasensitive detection of nucleoside triphosphates. Talanta 2012; 99:939-43. [PMID: 22967646 DOI: 10.1016/j.talanta.2012.07.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 07/22/2012] [Accepted: 07/25/2012] [Indexed: 11/30/2022]
Abstract
We report a conjugate of thioglycolic acid (TGA) capped CdTe quantum dot and Eu(3+) ion (TGA-CdTe QD-Eu(3+)) that can be used as an ultrasensitive luminescence turn-on sensor for nucleoside triphosphates (NTPs). The TGA-CdTe QD-Eu(3+) conjugate is a weakly luminescent species as a result of the strong quenching effect of Eu(3+) ion on the luminescence of TGA-CdTe QDs. The conjugate's luminescence can be readily restored by its reaction with adenosine triphosphate (ATP) and other NTPs, and thus gives an ultrasensitive detection of NTPs, with a detection limit of 2 nM. The sensing mechanism has also been explored, and the effective quenching of TGA-CdTe QDs emission by Eu(3+) ions has been attributed to photoinduced electron transfer (PET). ATP, as the representative of NTPs, can remove Eu(3+) from the surface of TGA-CdTe QDs, leading to restoration of the TGA-CdTe QDs luminescence.
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Affiliation(s)
- Jinqing Hong
- The Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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8
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Affiliation(s)
- Lawrence P Wackett
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, USA.
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9
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Copeland RA, Horiuchi KY. Kinetic effects due to nonspecific substrate-inhibitor interactions in enzymatic reactions. Biochem Pharmacol 1998; 55:1785-90. [PMID: 9714296 DOI: 10.1016/s0006-2952(97)00663-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nonspecific protein binding is a commonly encountered problem with synthetic molecules designed as enzyme inhibitors. When the substrate for the enzymatic reaction is itself a protein, such nonspecific protein binding can also occur. Here, we demonstrate that this phenomenon can have a dramatic effect on the steady-state kinetic evaluation of such inhibitors.
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Affiliation(s)
- R A Copeland
- Department of Chemical Enzymology, The DuPont Merck Research Laboratories, Wilmington, DE 19880-0400, USA.
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Cleland WW. Kinetic method for determination of dissociation constants of metal ion-nucleotide complexes. Methods Enzymol 1995; 249:181-8. [PMID: 7791611 DOI: 10.1016/0076-6879(95)49035-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- W W Cleland
- Institute of Enzyme Research, University of Wisconsin, Madison 53706, USA
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11
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Vander Elst L, Van Haverbeke Y, Goudemant JF, Muller RN. Stability assessment of gadolinium complexes by P-31 and H-1 relaxometry. Magn Reson Med 1994; 31:437-44. [PMID: 8208120 DOI: 10.1002/mrm.1910310413] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Longitudinal P-31 relaxation rate enhancements of phosphate groups have been measured at pH 7-7.2 and 310 degrees K on aqueous solutions containing adenosine triphosphate (ATP), phosphocreatine (PCr), inorganic phosphate (Pi) and some lanthanide complexes (Gd-DOTA, Gd-HPDO3A, Gd-DO3A, Gd-DTPA, Gd-DTPA-BMA). The macrocyclic complexes induce linear enhancements of the relaxation rates of all phosphorus nuclei. For Gd-DOTA and Gd-HPDO3A, the mechanism of the interaction with the P-31 nuclei seems to be of the outer sphere type and a better efficiency is noted for the "neutral" Gd-HPDO3A. A short-lived ternary complex between Gd-DO3A and the phosphorylated metabolites appears to be formed enabling an inner sphere interaction. In solutions containing the open chain complexes, Gd-DTPA and Gd-DTPA-BMA, P-31 relaxation rates of ATP exhibit significant and nonlinear enhancements that are much larger than those observed for PCr and Pi. A ternary complex involving the lanthanide ion, its original chelator, and the ATP molecule is precluded by various experiments which confirm that the lanthanide ion shifts from the original complexes to the ATP phosphate groups.
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Affiliation(s)
- L Vander Elst
- Department of Organic Chemistry, University of Mons-Hainaut, Belgium
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12
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Affiliation(s)
- W D Horrocks
- Department of Chemistry, Pennsylvania State University, University Park 16802
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13
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Ohyoshi E, Kohata S. A competitive spectrophotometric study of Eu(III) and Gd(III) complexes with adenosine 5′-triphosphate by use of a sensitive indicator ligand. J Inorg Biochem 1991. [DOI: 10.1016/0162-0134(91)84068-k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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McNemar CW, Horrocks WD. The determination of the Mg2+.ATP dissociation constant by competition with Eu3+ ion using laser-induced Eu3+ ion luminescence spectroscopy. Anal Biochem 1990; 184:35-8. [PMID: 2321757 DOI: 10.1016/0003-2697(90)90007-v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A direct spectroscopic method for the determination of the submicromolar dissociation constant of Eu3+. ATP using laser-induced Eu3+ ion luminescence spectroscopy is described. The dissociation constant of Mg2+.ATP is then determined by the competition of Mg2+ with Eu3+ for the binding of ATP. The experiments were performed in 2H2O to mitigate the significant quenching of the Eu3+ luminescence that occurs in 1H2O. Values for the effective dissociation constants of the 1:1 ATP metal ion complexes of 1.2 +/- 0.3 X 10(-7) and 2.7 +/- 0.7 X 10(-4) M are obtained for Eu3+ and Mg2+, respectively, at p2H 5.8.
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Affiliation(s)
- C W McNemar
- Department of Chemistry, Pennsylvania State University, University Park 16802
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15
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Hanley-Trawick S, Carpen ME, Dunaway-Mariano D, Pedersen PL, Hullihen J. Investigation of the substrate structure and metal cofactor requirements of the rat liver mitochondrial ATP synthase/ATPase complex. Arch Biochem Biophys 1989; 268:116-23. [PMID: 2521440 DOI: 10.1016/0003-9861(89)90571-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The F1 moiety of the rat liver mitochondrial ATP synthase/ATPase complex contains as isolated 2 mol Mg2+/mol F1, 1 mol of which is nonexchangeable and the other which is exchangeable (N. Williams, J. Hullihen, and P.L. Pedersen, (1987) Biochemistry 26, 162-169). In addition, the enzyme binds 1 mol ADP/mol F1 and 3 mol AMP.PNP, the latter of which can bind in complex formation with divalent cation and displace the Mg2+ at the exchangeable site. Thus, in terms of ligand binding sites the fully loaded rat liver F1 complex contains 3 mol MgAMP.PNP, 1 mol ADP, and 1 mol Mg2+. In this study we have used several metal ATP complexes or analogs thereof to gain further insight into the ligand binding domains of rat liver F1 and the mechanism by which it catalyzes ATP hydrolysis in soluble and membrane bound form. Studies with LaATP confirmed that MgATP is the most likely substrate for rat liver F1, and provided evidence that the enzyme may contain additional Mg2+ binding sites, undetected in previous studies of F1-ATPases, that are required for catalytic activity. Thus, F1 containing the thermodynamically stable LaATP complex in place of MgATP requires added Mg2+ to induce ATP hydrolysis. As Mg2+ cannot readily displace La2+ under these conditions there appears to be a catalytically important class of Mg2+ binding sites on rat liver F1, distinct from the nonexchangeable Mg2+ site and the sites involved in binding MgATP. Additional studies carried out with exchange inert metal-nucleotide complexes involving rhodium and the Mg2+ and Cd2+ complexes of ATP beta S and ATP alpha S imply that the rate-limiting step in the ATPase reaction pathway occurs subsequent to the P gamma-O-P beta bond cleavage steps, perhaps at the level of Mg(ADP)(Pi) hydrolysis or MgADP release. Evidence is presented that Mg2+ remains coordinated to the leaving group of the reaction, i.e., the beta phosphoryl group. Finally, in contrast to soluble F1, F1 bound to F0 in the inner mitochondrial membrane failed to discriminate between the Mg2+ complexes of the ATP beta S isomers. This indicates that a fundamental difference may exist between the catalytic or kinetic mechanism of F1 and the more physiologically intact F0F1 complex.
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Affiliation(s)
- S Hanley-Trawick
- Department of Chemistry and Biochemistry, University of Maryland, College Park 20742
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Joshi NB, Shamoo AE. Binding of Eu3+ to cardiac sarcoplasmic reticulum (Ca2+ + Mg2+)-ATPase-laser excited Eu3+ spectroscopic studies. Biophys J 1987; 51:185-91. [PMID: 2950937 PMCID: PMC1329879 DOI: 10.1016/s0006-3495(87)83324-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The binding of Eu3+ with Ca2+-stimulated, Mg2+-dependent adenosine triphosphatase ([Ca2+ + Mg2+]-ATPase) of cardiac sarcoplasmic reticulum (SR) has been investigated using direct laser excited Eu3+ luminescence. Eu3+ is found to inhibit both Ca2+-dependent ATPase activity and Ca2+-uptake in a parallel manner. This is attributed to the binding of Eu3+ to the high affinity Ca2+-binding sites. The Ki for Ca2+-dependent ATPase is approximately 50 nM. The 7F0----5D0 excitation spectrum of Eu3+ in cardiac SR shows a peak at 579.3 nm, as compared to 578.8 nm in potassium-morpholino propane sulfonic acid (K-MOPS) pH 6.8. Upon binding with cardiac SR, Eu3+ shows an increase in fluorescence intensity as well as in lifetime values. The fluorescence decay of bound Eu3+ exhibits a double-exponential curve. The apparent number of water molecules in the first coordination sphere of Eu3+ in SR is 2.8 for the short component and 1.0 for the long component. In the presence of ATP, a further increase in fluorescence lifetimes is observed, and the number of water molecules in the first coordination sphere of Eu3+ is reduced further to 1.3 and 0.5. The double exponential nature of the decay curve and the different number of water molecules coordinated to Eu3+ for both decay components suggest that Eu3+ binds to two sites and that these are heterogeneous. The reduction in the number of H2O ligands in the presence of ATP shows a change in the molecular environment of the Eu3+-binding sites upon phosphoenzyme formation, with a movement of Eu3+ to an occluded site on the enzyme.
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Eads CD, Mulqueen P, Horrocks WD, Villafranca JJ. Characterization of ATP complexes with lanthanide (III) ions. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)42711-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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18
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Scott TL. Luminescence studies of Tb3+ bound to the high affinity sites of the Ca2+-ATPase of sarcoplasmic reticulum. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)43005-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Gutman M, Levy MA. Fluorescence decay time measurements of Eu3+-ATP-enzyme complexes. Replacement of the metal hydration water by active site ligands. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(17)44144-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Neet KE, Furman TC, Hueston WJ. Activation of yeast hexokinase by chelators and the enzymic slow transition due to metal-nucleotide interactions. Arch Biochem Biophys 1982; 213:14-25. [PMID: 7036903 DOI: 10.1016/0003-9861(82)90434-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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