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Browsing by Subject "Crystallography, X-Ray"

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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  

      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  

      Design of a modified mouse protein with ligand binding properties of its human analog by molecular dynamics simulations: The case of C3 inhibition by compstatin 

      Tamamis, Phanourios; Pierou, P.; Mytidou, C.; Floudas, C. A.; Morikis, D.; Archontis, Georgios Z. (2011)
      The peptide compstatin and its derivatives inhibit the complement-component protein C3 in primate mammals and are potential therapeutic agents against the unregulated activation of complement in humans, but are inactive ...

    • 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  

      Glycogen phosphorylase inhibitors: A free energy perturbation analysis of glucopyranose spirohydantoin analogues 

      Archontis, Georgios Z.; Watson, K. A.; Xie, Q.; Andreou, Georgia; Chrysina, Evangelia D.; Zographos, Spyros E.; Oikonomakos, Nikos G.; Karplus, M. (2005)
      GP catalyzes the phosphorylation of glycogen to Glc-1-P. Because of its fundamental role in the metabolism of glycogen, GP has been the target for a systematic structure-assisted design of inhibitory compounds, which could ...

    • 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  

      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  

      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  

      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  

      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  

      New antimony(III) bromide complexes with thioamides: Synthesis, characterization, and cytostatic properties 

      Ozturk, I. I.; Hadjikakou, Sotiris K.; Hadjiliadis, Nick; Kourkoumelis, Nikolaos; Kubicki, Maciej; Tasiopoulos, Anastasios J.; Scleiman, H.; Barsan, M. M.; Butler, I. S.; Balzarini, J. (2009)
      New antimony(III) bromide complexes with the heterocyclic thioamides, thiourea (TU), 2-mercapto-1-methylimidazole (MMl), 2-mercapto-benzimidazole (MBZlM), 2-mercapto-5-methyl-benzimidazole (MMBZIM), 5-ethoxy-2-mercapto- ...

    • Article  

      New antimony(III) halide complexes with dithiocarbamate ligands derived from thiuram degradation: The effect of the molecule's close contacts on in vitro cytotoxic activity 

      Urgut, O. S.; Ozturk, I. I.; Banti, Christina N.; Kourkoumelis, Nikolaos; Manoli, Maria; Tasiopoulos, Anastasios J.; Hadjikakou, Sotiris K. (2016)
      Antimony(III) halide complexes of the formulae {[SbBr(Me2DTC)2]n} (1), {[SbI(Me2DTC)2]n} (2) and {[(Me2DTC)2Sb(μ2-I)Sb(Me2DTC)2]+.I3-} (3) (Me2DTC = dimethyldithiocarbomate) were synthesized from SbX3, (X = Br or I) and ...

    • Article  

      Novel lipophilic amidate oxorhenium and oxotechnetium complexes as potential brain agents: Synthesis, characterization and biological evaluation 

      Papadopoulos, Minas S.; Nock, B.; Maina-Nock, Theodosia; Pirmettis, Ioannis C.; Raptopoulou, Catherine P.; Tasiopoulos, Anastasios J.; Troganis, Anastassios N.; Kabanos, Themistoklis A.; Terzis, Aris; Chiotellis, Efstratios (2001)
      Novel oxorhenium and oxotechnetium complexes based on the tetradentate 1-(2-hydroxybenzamido)-2-(pyridinecarboxamido)benzene, H3L, ligand have been synthesized and characterized herein. Thus, by reacting equimolar quantities ...

    • Article  

      Pentanuclear complexes with unusual structural topologies from the initial use of two aliphatic amino-alcohol ligands in Fe chemistry 

      Kizas, Christos M.; Manos, Manolis J.; Nastopoulos, Vassilios; Boudalis, Athanassios K.; Sanakis, Yiannis; Tasiopoulos, Anastasios J. (2012)
      Five novel pentanuclear Fe 3+ clusters with the aliphatic amino-alcohol ligands 3-amino-1-propanol (Hap) and 2-(hydroxymethyl)piperidine (Hhmpip) [Fe 5(μ 3-Ο) 2(L) 4(O 2CR) 7] [L = ap -, R = Ph (1)

    • Article  

      PKD2, a gene for polycystic kidney disease that encodes an integral membrane protein 

      Mochizuki, Toshio; Wu, G.; Hayashi, Tomohito; Xenophontos, Stavroulla L.; Veldhuisen, B.; Saris, J. J.; Reynolds, D. M.; Cai, Y.; Gabow, P. A.; Pierides, Alkis M.; Kimberling, W. J.; Breuning, M. H.; Constantinou-Deltas, Constantinos D.; Peters, D. J. M.; Somlo, Stefan (1996)
      A second gene for autosomal dominant polycystic kidney disease was identified by positional cloning. Nonsense mutations in this gene (PKD2) segregated with the disease in three PKD2 families. The predicted 968-amino acid ...

    • Article  

      Solid state and aqueous solution characterization of rectangular tetranuclear VIV/V-p-semiquinonate/hydroquinonate complexes exhibiting a proton induced electron transfer 

      Drouza, Chryssoula; Keramidas, Anastasios D. (2008)
      Reaction of the non-innocent dinucleating ligand 2,5-bis[N,N- bis(carboxymethyl) arninomethyl]hydroquinone (H6bicah) with VO 2+ and VO43- salts in water in the pH range 2 to 4.5 provides a series of novel tetranuclear VIV ...

    • Article  

      Structural motifs and biological studies of new antimony(iii) iodide complexes with thiones 

      Ozturk, I.; Filimonova, S.; Hadjikakou, Sotiris K.; Kourkoumelis, Nikolaos; Dokorou, Vaso N.; Manos, Manolis J.; Tasiopoulos, Anastasios J.; Barsan, M. M.; Butler, I. S.; Milaeva, E. R.; Balzarini, J.; Hadjiliadis, Nick (2010)
      Eight new antimony(III) iodide complexes of the heterocyclic thioamides, 2-mercapto-1-methylimidazole (MMI), 2-mercaptobenzlmidazole (MBZIM), 5-ethoxy-2-mercaptobenzimldazole (EtMBZIM), 2-mercaptothiazolidine (MTZD), ...

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