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Metal binding ability of hypermodified nucleosides of t-RNA. Potentiometric and spectroscopic studies on the metal complexes of N-[(9-β-D-ribofuranosylpurin-6-yl)-carbamoyl] threonine.
Autorzy
Rok wydania
1990
Czasopismo
Journal of Inorganic Biochemistry
Numer woluminu
40
Strony
357-363
DOI
10.1016/0162-0134(90)80070-E
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Copper(II), nickel(II), zinc(II), manganese(II), and magnesium(II) complexes of t6A (N-[9-β-D-ribofuranosylpurin-6-yl)carbamoyl] threonine and t6Ade (N6(threoninocarbonyl)adenine) were studied by potentiometric and spectroscopic methods. It was found that t6Ade has three dissociable protons in the accessible pH range (N1 and N9 of purine and carboxylate), while only two pK values are characteristic of t6A. Magnesium(II) and manganese(II) do not interact effectively with these ligands, but copper(II) and nickel(II) ions form very stable complexes with the coordination of purine N1, deprotonated amide nitrogen, and carboxy late oxygen donors.
Adres publiczny
https://doi.org/10.1016/0162-0134(90)80070-E
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Metal binding ability of hypermodified nucleosides of t-RNA. II Copper(II) complexes of uridine and thiouridine derivatives.
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