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The effect of spermine concentration on the solution structure of complexes formed in copper(II)/adenosine 5'-triphosphate/phosphoserine system.

Abstract：

:Quaternary systems of copper(II) complexes with adenosine 5'-triphosphate, O-phospho L-serine and with equimolar or excessive amount of spermine have been investigated. The studies have been performed in aqueous solution. Types of complexes and the overall stability constants have been determined using the potentiometric method with computer analysis of the data. On the basis of the results of spectroscopic studies (nuclear magnetic resonance, visible, circular dichroism, Raman, infrared and electron paramagnetic resonance spectroscopies) as well as equilibrium studies, the mode of interactions has been proposed. The reaction centers in the systems studied are the phosphate, carboxyl and amine groups from phosphorylated serine, heterocyclic nitrogen atom from purine ring and phosphate groups from adenosine 5'-triphosphate as well as amine groups from polyamine. The influence of change in the concentration of the polyamine (spermine) on the mode of coordination is discussed. It has been shown that in the physiological conditions an increase in the polyamine concentration changes the mode of metal bonding in the CuH(3)(ATP)(Ser-P)(Spm) complexes (isomer I - coordination {2N,O(x)}, isomer II - coordination {3N,O(x)} and significant differences in sites of interaction).

journal_name

J Inorg Biochem

journal_title

Journal of inorganic biochemistry

authors

Jastrzab R,Runka T,Skowronek P,Lomozik L

doi

10.1016/j.jinorgbio.2010.04.006

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

868-76

issue

8

eissn

0162-0134

issn

1873-3344

pii

S0162-0134(10)00096-6

journal_volume

104

pub_type

杂志文章

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