Molecular Biology

, Volume 47, Issue 2, pp 299–306

Structure of DNA complexes with chromosomal protein HMGB1 and histone H1 in the presence of manganese ions: 2. Vibrational circular dichroism spectroscopy

  • A. M. Polyanichko
  • V. I. Vorob’ev
  • E. V. Chikhirzhina
Structural and Functional Analysis of Biopolymers and Their Complexes

DOI: 10.1134/S0026893313020118

Cite this article as:
Polyanichko, A.M., Vorob’ev, V.I. & Chikhirzhina, E.V. Mol Biol (2013) 47: 299. doi:10.1134/S0026893313020118
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Abstract

DNA complexes with nonhistone HMGB1 chromatin protein and histone H1 in the presence of manganese ions were studied using methods of absorption and circular dichroism spectroscopy in the infrared region. It was demonstrated that the method provides good results, even for solutions that contain large particles, which cause scattering in UV region. It was determined that manganese ions in the complex are able to coordinate not only to different chemical groups in DNA, but also to dicarboxylic acid residues of the HMGB1 protein, which stimulates DNA condensation and slightly weakens DNA-protein interactions in the complex.

Keywords

DNADNA-protein interactionsIR/VCD spectroscopymanganese ionsnonhistone HMGB1 proteinlinker histone H1

Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  • A. M. Polyanichko
    • 1
    • 2
  • V. I. Vorob’ev
    • 1
    • 2
  • E. V. Chikhirzhina
    • 2
  1. 1.Department of PhysicsSt. Petersburg State UniversitySt. Petersburg, Staryi PitergofRussia
  2. 2.Institute of CytologyRussian Academy of SciencesSt. PetersburgRussia