Description

• Title:
  A direct determination of the dissociation constant for the Cu(II) complex of amyloid beta 1-40 peptide.
• Creator:
  Rózga, Małgorzata;
  Kłoniecki, Marcin;
  Dadlez, Michal;
  Bal, Wojciech
• Description:
  Interactions of amyloid beta (Abeta) peptides with Cu(II) are believed to play a crucial role in the molecular mechanisms of neurotoxicity of Alzheimer's disease. There is, however, a serious disagreement regarding the strength of Cu(II) binding to these peptides. We used recombinant amyloid beta peptide 1-40 (Abeta40) to determine the stoichiometry and dissociation constants of Cu(II)-Abeta40 complexes using fluorescence spectroscopy. A single Cu(Abeta40) complex, characterized with the conditional dissociation constant K(d)(cond) = 57 +/- 5 nM was identified. This complex does not bind Hepes buffer molecules, as indicated by the total lack of relationship between K(d)(cond) values and Hepes concentration. The differences between this and other determinations of this constant and its relevance for the understanding of Cu(II) interaction with Abeta peptides are discussed.
• Object availability:
  free access
• Date:
  2010
• Type:
  Article;
  PeerReviewed
• Relation: http://eprints.ibb.waw.pl/78
• Subject:
  Q Science (General)
• Identifier:
  Rózga, Małgorzata and Kłoniecki, Marcin and Dadlez, Michal and Bal, Wojciech (2010) A direct determination of the dissociation constant for the Cu(II) complex of amyloid beta 1-40 peptide. Chemical research in toxicology, 23 (2). pp. 336-40. ISSN 1520-5010
• Data provider:
  Repozytorium Instytutu Biochemii i Biofizyki Polskiej Akademii Nauk
• Can I use it?:
  seek permission
• Type:
  other