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Browsing by Subject "X ray crystallography"

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Now showing items 1-20 of 48

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    • Article  

      The 1.76 Å resolution crystal structure of glycogen phosphorylase b complexed with glucose, and CP320626, a potential antidiabetic drug 

      Oikonomakos, Nikos G.; Zographos, Spyros E.; Skamnaki, Vicky T.; Archontis, Georgios Z. (2002)
      CP320626, a potential antidiabetic drug, inhibits glycogen phosphorylase in synergism with glucose. To elucidate the structural basis of synergistic inhibition, we determined the structure of muscle glycogen phosphorylase ...

    • Article  

      Amphiphilic single and double networks: a small-angle X-ray scattering investigation 

      Zhang, X. K.; Kyriakos, K.; Rikkou-Kalourkoti, Maria D.; Kitiri, E. N.; Patrickios, Costas S.; Papadakis, Christine M. (2016)
      We investigated the microphase-separated morphologies of water-swollen amphiphilic single and double polymer networks using small-angle X-ray scattering (SAXS). The networks consist of (i) a first conetwork containing ...

    • Article  

      Correlations of synthetic, spectroscopic, structural, and speciation studies in the biologically relevant Cobalt(II) - Citrate system: The tale of the first aqueous dinuclear Cobalt(II) - Citrate complex 

      Kotsakis, N.; Raptopoulou, C. P.; Tangoulis, V.; Terzis, A.; Giapintzakis, John; Jakusch, T.; Kiss, T.; Salifoglou, A. (2003)
      Synthetic efforts targeting soluble species of Co(II) with the low molecular mass physiological ligand citric acid led to the isolation of the first dinuclear complex [Co2(C6H5O7)2 (H2O)4]2-, at pH ∼5, in the form of its ...

    • Article  

      Crystallographic and computational studies on 4-phenyl-N-(β-D- glucopyranosyl)-1H-1,2, 3-triazole-1-acetamide, an inhibitor of glycogen phosphorylase: Comparison with α-D-glucose, N-acetyl-β-D- glucopyranosylamine and N-benzoyl-N′-β-D-glucopyranosyl urea binding 

      Alexacou, Kyra Melinda; Hayes, Joseph M.; Tiraidis, Costas; Zographos, Spyros E.; Leonidas, Demetres D.; Chrysina, Evangelia D.; Archontis, Georgios Z.; Oikonomakos, Nikos G.; Paul, J. V.; Varghese, B.; Loganathan, D. (2008)
      4-Phenyl-N-(β-D-glucopyranosyl)-1H-1,2,3-triazole-1-acetamide (glucosyltriazolylacetamide) has been studied in kinetic and crystallographic experiments with glycogen phosphorylase b (GPb), in an effort to utilize its ...

    • Article  

      Employment of methyl 2-pyridyl ketone oxime in manganese non-carboxylate chemistry: MnII2MnIV and MnII 2MnIII6 complexes 

      Stoumpos, Constantinos C.; Stamatatos, Theocharis C.; Sartzi, H.; Roubeau, O.; Tasiopoulos, Anastasios J.; Nastopoulos, Vassilios; Teat, S. J.; Christou, George; Perlepes, Spyros P. (2009)
      The employment of the anion of methyl 2-pyridyl ketone oxime (mpko -) as a tridentate chelating/bridging ligand in manganese chemistry is described. The inorganic anion (Br-, ClO4-) used in the reaction affects the identity ...

    • Article  

      Glucose-based spiro-isoxazolines: A new family of potent glycogen phosphorylase inhibitors 

      Benltifa, Mahmoud; Hayes, Joseph M.; Vidal, Sébastien; Gueyrard, David; Goekjian, Peter G.; Praly, Jean Pierre; Kizilis, Gregory; Tiraidis, Costas; Alexacou, Kyra Melinda; Chrysina, Evangelia D.; Zographos, Spyros E.; Leonidas, Demetres D.; Archontis, Georgios Z.; Oikonomakos, Nikos G. (2009)
      A series of glucopyranosylidene-spiro-isoxazolines was prepared through regio- and stereoselective [3+2]-cycloaddition between the methylene acetylated exo-glucal and aromatic nitrile oxides. The deprotected cycloadducts ...

    • Article  

      High nuclearity single-molecule magnets: A mixed-valence Mn26 cluster containing the di-2-pyridylketone diolate dianion 

      Stamatatos, Theocharis C.; Nastopoulos, Vassilios; Tasiopoulos, Anastasios J.; Moushi, Eleni E.; Wernsdorfer, W.; Christou, George; Perlepes, Spyros P. (2008)
      The employment of the dianion (dpkd2-) of the gem-diol form of di-2-pyridylketone (dpk) as a tetradentate chelate in manganese chemistry is reported, and the synthesis, crystal structure, and magnetochemical characterization ...

    • Article  

      HIV-1 integrase: From biology to chemotherapeutics 

      Zeinalipour-Loizidou, E.; Nicolaou, Charalambos P.; Nicolaïdes, Andrew N.; Kostrikis, Leontios G. (2007)
      AIDS has claimed the lives of 25 million people worldwide, an additional 40 million people are HIV-infected and new cases are being diagnosed every year. Despite the fact that HAART has moved AIDS from the category of ...

    • Article  

      HIV-1 integrase: From biology to chemotherapeuticsAAA 

      Zeinalipour-Loizidou, E.; Nicolaou, Charalambos P.; Nicolaïdes, Andrew N.; Kostrikis, Leontios G. (2007)
      AIDS has claimed the lives of 25 million people worldwide, an additional 40 million people are HIV-infected and new cases are being diagnosed every year. Despite the fact that HAART has moved AIDS from the category of ...

    • Article  

      Inducing single-molecule magnetism in a family of loop-of-loops aggregates: Heterometallic Mn40Na4 clusters and the homometallic Mn44 analogue 

      Moushi, Eleni E.; Lampropoulos, Christos; Wernsdorfer, W.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2010)
      The syntheses, crystal structures, and magnetic properties of a new family of heterometallic Mn40Na4 and homometallic Mn44 loop-of-loops aggregates are reported. The reactions of [Mn3O(O 2CMe)6(py)3]•py with 1,3-propanediol ...

    • Article  

      Insertion of functional groups into a Nd 3+ metal-organic framework via single-crystal-to-single-crystal coordinating solvent exchange 

      Manos, Manolis J.; Kyprianidou, Eleni J.; Papaefstathìou, Giannis S.; Tasiopoulos, Anastasios J. (2012)
      Single-crystal-to-single-crystal (SCSC) transformations represent some of the most fascinating phenomena in chemistry. They are not only intriguing from a basic science point of view but also provide a means to modify or ...

    • Article  

      Investigation on uranyl interaction with bioactive ligands. Synthesis and structural studies of the uranyl complexes with glycine and N-(2-mercaptopropionyl)glycine 

      Keramidas, Anastasios D.; Rikkou, Maria P.; Drouza, Chryssoula; Raptopoulou, Catherine P.; Terzis, Aris; Pashalidis, Ioannis (2002)
      Three new uranium(VI) compounds have been prepared with glycine (Hgly), N-(2-mercaptopropionyl)glycine (Hmpg) and 2,2′-dithiobis(N-propionylglycine) (tpg). The crystal structure of [UO2(Hgly)2Cl2] has been solved, revealing ...

    • Article  

      Kinetic and crystallographic studies of glucopyranose spirohydantoin and glucopyranosylamine analogs inhibitors of glycogen phosphorylase 

      Watson, K. A.; Chrysina, Evangelia D.; Tsitsanou, K. E.; Zographos, Spyros E.; Archontis, Georgios Z.; Fleet, G. W. J.; Oikonomakos, Nikos G. (2005)
      Glycogen phosphorylase (GP) is currently exploited as a target for inhibition of hepatic glycogenolysis under high glucose conditions. Spirohydantoin of glucopyranose and N-acetyl-β-D-glucopyranosylamine have been identified ...

    • Article  

      Manganese citrate chemistry: Syntheses, spectroscopic studies, and structural characterizations of novel mononuclear, water-soluble manganese citrate complexes 

      Matzapetakis, M.; Karligiano, N.; Bino, A.; Dakanali, M.; Raptopoulou, C. P.; Tangoulis, V.; Terzis, A.; Giapintzakis, John; Salifoglou, A. (2000)
      The first two mononuclear manganese citrate complexes, (NH4)4[Mn(II)(C6H5O7)2] (1) and (NH4)5[Mn(III)(C6H4O7)2]·2H2O (2) were synthesized in aqueous solutions near physiological pH values. They were isolated in their pure ...

    • Article  

      Mixed transition metal-lanthanide complexes at high oxidation states: Heteronuclear CeIVMnIV clusters 

      Tasiopoulos, Anastasios J.; Milligan Jr., P. L.; Abboud, K. A.; O'Brien, T. A.; Christou, George (2007)
      The syntheses of the first mixed-metal CeIVMnIV complexes are reported. [CeMn2O3(O2CMe)(NO 3)4(H2O)2(bpy)2]-(NO 3) (1

    • Article  

      A Mn15 single-molecule magnet consisting of a supertetrahedron incorporated in a loop 

      Moushi, Eleni E.; Masello, A.; Wernsdorfer, W.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2010)
      Two new Mn15 clusters consisting of a supertetrahedron which is incorporated in a loop are reported. The reactions of [Mn(O2CEt) 2]·2H2O with the diols 1,3-propanediol (H 2pd) or 2-methyl-1,3-propanediol (H2mpd) in the ...

    • Article  

      Model investigations for vanadium-protein interactions: Vanadium(III) compounds with dipeptides and their oxovanadium(IV) analogues 

      Tasiopoulos, Anastasios J.; Tolis, Evangelos I.; Tsangaris, John Michael; Evangelou, Angelos M.; Woollins, J. D.; Slawin, A. M. Z.; Pessoa, J. C.; Correia, I.; Kabanos, Themistoklis A. (2002)
      The reaction of VCl3 with 1,10-phenanthroline and a series of dipeptides (H2dip), having aliphatic as well as aromatic side chains, in methyl alcohol and in the presence of triethylamine affords vanadium(III) compounds of ...

    • Article  

      Molecular Dynamics in Drug Design: New Generations of Compstatin Analogs 

      Tamamis, Phanourios; López de Victoria, A.; Gorham, R. D.; Bellows-Peterson, M. L.; Pierou, P.; Floudas, C. A.; Morikis, D.; Archontis, Georgios Z. (2012)
      We report the computational and rational design of new generations of potential peptide-based inhibitors of the complement protein C3 from the compstatin family. The binding efficacy of the peptides is tested by extensive ...

    • Article  

      Molybdenum(VI) coordination chemistry of the N,N-disubstituted bis(hydroxylamido)-1,3,5-triazine ligand, H2bihyat. Water-assisted activation of the MoVI=O bond and reversible dimerization of cis-[MoVIO2(bihyat)] to [MoVI2O 4(bihyat)2(H2O)2] 

      Stylianou, Marios; Nikolakis, Vladimiros A.; Chilas, G. I.; Jakusch, T.; Vaimakis, T.; Kiss, Tamás; Sigalas, Michael P.; Keramidas, Anastasios D.; Kabanos, Themistoklis A. (2012)
      Reaction of the N,N-disubstituted bis(hydroxylamino) ligand 2,6-bis[hydroxy(methyl)amino]-4-morpholino-1,3,5-triazine (H2bihyat) with cis-[MoVIO2(acac)2] in tetrahydrofuran resulted in isolation of the mononuclear compound ...

    • Article  

      Monolayers, bilayers and micelles of zwitterionic lipids as model systems for the study of specific anion effects 

      Aroti, Andria; Leontidis, Epameinondas; Dubois, M.; Zemb, T.; Brezesinski, G. (2007)
      This work is a review of the effect of different monovalent anions (belonging to the Hofmeister series) on a single model amphiphile, phosphatidylcholine molecules in contact with water, in three different geometries, ...

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