title: Chemoenzymatic synthesis of 7-deaza cyclic adenosine 5'-diphosphate ribose analogues, membrane-permeant modulators of intracellular calcium release.
abstract: An optimized synthetic route to 7-deaza-8-bromo-cyclic adenosine 5'-diphosphate ribose (7-deaza-8-bromo-cADPR 3), an established cell-permeant, hydrolysis-resistant cyclic adenosine 5'-diphosphate ribose (cADPR) antagonist, is presented. Using NMR analysis, we found that 3 adopted a C-2' endo conformation in the N9-linked ribose and a syn conformation about the N9-glycosyl linkage, which are similar to that of cADPR. The synthetic route was also employed to produce 7-deaza-2'-deoxy-cADPR 4, a potential cell-permeant cADPR analogue. 3 and 4 were more stable to chemical hydrolysis, consistent with the observation that 7-deaza-cADPR analogues are more stable than their parent adenosine derivatives. 3 was also found to be stable to enzyme-mediated hydrolysis using CD38 ectoenzyme.
authors.affiliation: Wolfson Laboratory of Medicinal Chemistry, Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Victoria C
authors.initials: VC
authors.lastname: Bailey
authors.forename: Barry V L
authors.initials: BV
authors.lastname: Potter
mesh_terms: D002118:Calcium / Q000737:chemistry*; D002463:Cell Membrane Permeability / Q000187:drug effects*; D002851:Chromatography, High Pressure Liquid; D036563:Cyclic ADP-Ribose / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008968:Molecular Conformation
chemical_list: C106088:7-deaza cyclic adenosine 5'-diphosphate ribose; D036563:Cyclic ADP-Ribose; D002118:Calcium