23567-96-6Relevant articles and documents
Studies of nucleosides and nucleotides. XXXIX. Synthesis of 8-substituted purine nucleotides by the direct replacement reactions.
Ikehara,Tazawa,Fukui
, p. 1019 - 1024 (1969)
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Mikhailov et al.
, (1976)
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Variable-Temperature NMR Spectroscopy, Conformational Analysis, and Thermodynamic Parameters of Cyclic Adenosine 5′-Diphosphate Ribose Agonists and Antagonists
Saatori, Sarah-Marie,Perez, Tanner J.,Graham, Steven M.
, p. 2554 - 2569 (2018/03/09)
Cyclic adenosine 5′-diphosphate ribose (cADPR) is a ubiquitous Ca2+-releasing second messenger. Knowledge of its conformational landscape is an essential tool for unraveling the structure-activity relationship (SAR) in cADPR. Variable-temperature 1H NMR spectroscopy, in conjunction with PSEUROT and population analyses, allowed us to determine the conformations and thermodynamic parameters of the furanose rings, γ-bonds (C4′-C5′), and β-bonds (C5′-O5′) in the cADPR analogues 2′-deoxy-cADPR, 7-deaza-cADPR, and 8-bromo-cADPR. A significant finding was that, although the analogues are similar to each other and to cADPR itself in terms of overall conformation and population (ΔG°), there were subtle yet important differences in some of thermodynamic properties (ΔH°, ΔS°) associated with each of the conformational equilibria. These differences prompted us to propose a model for cADPR in which the interactions between the A2′-N3, A5″-N3, and H2-R5′ atoms serve to fine-tune the N-glycosidic torsion angles (χ).
Synthesis of cyclic adenosine 5′-diphosphate ribose analogues: A C2′ endo/syn "southern" ribose conformation underlies activity at the sea urchin cADPR receptor
Moreau, Christelle,Ashamu, Gloria A.,Bailey, Victoria C.,Galione, Antony,Guse, Andreas H.,Potter, Barry V. L.
experimental part, p. 278 - 290 (2011/02/23)
Novel 8-substituted base and sugar-modified analogues of the Ca 2+ mobilizing second messenger cyclic adenosine 5′-diphosphate ribose (cADPR) were synthesized using a chemoenzymatic approach and evaluated for activity in sea urchin egg homogenate (SUH) and in Jurkat T-lymphocytes; conformational analysis investigated by 1H NMR spectroscopy revealed that a C2′ endo/syn conformation of the "southern" ribose is crucial for agonist or antagonist activity at the SUH-, but not at the T cell-cADPR receptor.