Research output: Contribution to journal › Article › peer-review
DNA interaction with complex ions in solution. / Kasyanenko, N. A.; Zanina, A. V.; Nazarova, O. V.; Panarin, E. F.
In: Langmuir, Vol. 15, No. 23, 09.11.1999, p. 7912-7917.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - DNA interaction with complex ions in solution
AU - Kasyanenko, N. A.
AU - Zanina, A. V.
AU - Nazarova, O. V.
AU - Panarin, E. F.
N1 - Copyright: Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 1999/11/9
Y1 - 1999/11/9
N2 - The methods of flow birefringence, low shear viscometry, and circular dichroism were used to investigate the DNA conformation in solution during the interaction with coordination compounds [Co(NH3)6]Cl3 and [Co(NO2)6]Na3. It has been shown that the compound [Co(NO2)6]Na3, which dissociates in an aqueous solution to produce a negative complex ion [Co(NO2)6]3-, binds to a DNA molecule, causing considerable changes in its parameters. For the binding to occur, the complex ion must undergo a transition to its aqueous form. Even a low cobalt content is shown to produce DNA shrinkage. It is attended by an increased DNA optical anisotropy. This effect was observed for both compounds used. The comparison of these data with earlier results on DNA-Fe3+ interaction has revealed some features common to the DNA binding to trivalent metal ions. We have suggested that the mutual orientation of DNA statistical segments is changed because of the formation of intramolecular linkages between trivalent ions and remote DNA chain segments.
AB - The methods of flow birefringence, low shear viscometry, and circular dichroism were used to investigate the DNA conformation in solution during the interaction with coordination compounds [Co(NH3)6]Cl3 and [Co(NO2)6]Na3. It has been shown that the compound [Co(NO2)6]Na3, which dissociates in an aqueous solution to produce a negative complex ion [Co(NO2)6]3-, binds to a DNA molecule, causing considerable changes in its parameters. For the binding to occur, the complex ion must undergo a transition to its aqueous form. Even a low cobalt content is shown to produce DNA shrinkage. It is attended by an increased DNA optical anisotropy. This effect was observed for both compounds used. The comparison of these data with earlier results on DNA-Fe3+ interaction has revealed some features common to the DNA binding to trivalent metal ions. We have suggested that the mutual orientation of DNA statistical segments is changed because of the formation of intramolecular linkages between trivalent ions and remote DNA chain segments.
KW - CONDENSATION
KW - CATIONS
KW - BINDING
KW - CO(III)
UR - http://www.scopus.com/inward/record.url?scp=0033355037&partnerID=8YFLogxK
U2 - 10.1021/la980980p
DO - 10.1021/la980980p
M3 - Article
AN - SCOPUS:0033355037
VL - 15
SP - 7912
EP - 7917
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 23
ER -
ID: 73393035