Coordination and Noncovalent Interactions in the Systems of Copper(II), Guanosine and Biogenic Amine

• Autorzy: Jastrząb R. , Lomozik L.
• Języki publikacji: EN

Abstrakty

EN

Molecular complex formation between guanosine (Guo) and biogenic amines: putrescine (Put), spermidine (Spd) and spermine (Spm) as well as coordination of these ligands with the copper(II) ions have been studied. It has been found that the positive centres of noncovalent ion-dipole interactions are the protonated amine groups of the polyamines, while the negative centres are the endocyclic nitrogen atoms N(7) or N(1) of guanosine. In the binary systems at low pH, the main site of noncovalent interaction and a metallation centre in guanosine is the nitrogen atom N(7). With deprotonation of N(1), the reaction centre shifts from N(7) to N(1). At high pH the nitrogen atom N(1) becomes the main centre of interactions between the nucleoside and polyamines (PA) and it also becomes an effective site of Cu(II) ions bonding. The addition of spermine to the Cu(II)/guanosine system leads to a disappearance of the coordination dichotomy observed in binary systems, whereas the introduction of putrescine and spermidine extends the range of the dichotomy to high pH values.

Słowa kluczowe

EN

guanosine; polyamine; noncovalent interactions; adducts; copper complexes

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2007
• Tom: Vol. 81, nr 7
• Strony: 1289--1302
• Opis fizyczny: Bibliogr. 36 poz., rys.

Twórcy

autor

Jastrząb R.

autor

Lomozik L.

• Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Grunwaldzka 6, Poland,

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