Ganguly, Sonali; Kundu, Kiron K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1994, vol. 33, # 12, p. 1099 - 1103
Straightforward Ball‐Milling Access to Dinucleoside 5′,5′‐Polyphosphates via Phosphorimidazolide Intermediates
作者:Lucie Appy、Anaïs Depaix、Xavier Bantreil、Frédéric Lamaty、Suzanne Peyrottes、Béatrice Roy
DOI:10.1002/chem.201805924
日期:2019.2.18
mechanochemical approach to access symmetrical and mixed dinucleoside 5,5′‐polyphosphates is reported. Under ball‐milling conditions, nucleoside5′‐monophosphates were quantitatively activated using 1,1′‐carbonyldiimidazole, forming their phosphorimidazolide derivatives. The addition of a nucleoside5′‐mono‐, di‐ or triphosphate directly led to the formation of the corresponding dinucleotides. Benefits
Histidine triad nucleotide‐binding proteins HINT1 and HINT2 share similar substrate specificities and little affinity for the signaling dinucleotide Ap4A
作者:Alexander Strom、Cher Ling Tong、Carston R. Wagner
DOI:10.1002/1873-3468.13745
日期:2020.5
Human histidinetriadnucleotide‐bindingprotein 2 (hHINT2) is an important player in human mitochondrial bioenergetics, but little is known about its catalytic capabilities or its nucleotide phosphoramidate prodrug (proTide)‐activating activity akin to the cytosolic isozyme hHINT1. Here, a similarsubstratespecificity profile (kcat/Km) for model phosphoramidate substrates was found for hHINT2 but
Metal ion-promoted cleavage of nucleoside diphosphosugars: a model for reactions of phosphodiester bonds in carbohydrates
作者:Meisa Dano、Marjukka Elmeranta、David R. W. Hodgson、Juho Jaakkola、Heidi Korhonen、Satu Mikkola
DOI:10.1007/s00775-015-1308-9
日期:2015.12
complexes. The results show that metalion catalysts promote the cleavage via intramolecular transesterification whenever a neighbouring HO group can adopt a cis-orientation with respect to the phosphate. The HO group attacks the phosphate and two monophosphate products are formed. If such a nucleophile is not available, Cu2+ complexes are able to promote a nucleophilic attack of an external nucleophile
The dimetallic cryptate [Cu-2(II)(1)(4+) selectively recognizes guanosine monophosphate with respect to other nucleoside monophospates (NMPs) in a MeOH/water solution at pH 7. Recognition is efficiently signaled through the displacement of the indicator 6-carboxyfluorescein bound to the receptor, monitoring its yellow fluorescent emission. Titration experiments evidenced the occurrence of several simultaneous equilibria involving 1:1 and 2:1 receptor/NMP and receptor/indicator complexes. It was demonstrated that the added NIMP displaces the indicator from the 2:1 receptor/indicator complex, forming the 1:1 receptor/analyte inclusion complex. Recognition selectivity is thus ascribed to the nature of nucleotide donor atoms involved in the coordination and their ability to encompass the Cu-II-Cu-II distance within the cryptate.
A Versatile Synthesis of 5′-Functionalized Nucleosides Through Regioselective Enzymatic Hydrolysis of Their Peracetylated Precursors
describe a chemo-enzymatic synthesis of modified nucleosidesthrough lipase-catalyzed hydrolysis of their peracetylatedprecursors. It was found from screening of a large number of substrates that these enzymes' regioselectivities were affected by the sugar and the nucleobase structures. By selecting the best enzyme for each substrate in terms of activity and regioselectivity, we prepared a small library