Investigation of Large Intramolecular Movements within Metmyoglobin by Rayleigh Scattering of Mössbauer Radiation (RSMR)

F. Parak, R. L. Mössbauer, Yu F. Krupyanski, V. I. Goldanskii, E. E. Gaubman, I. P. Suzdalev, H. Engelmann

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

This paper reports Rayleigh scattering experiments on metmyoglobin crystals and freeze dried myoglobin which was exposed to air with different partial pressure of water vapor. While dry myoglobin shows no fluctuations between conformational substates such “breathing modes” are rearly seen in water covered myoglobin. Larger amounts of water increase the average mean square displacements. In crystals the dynamic behaviour is hindered by the crystal packing. The results are analysed by a theory describing the motion within the molecule by a Langevin equation with restoring forces corresponding to a square well potential.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalZeitschrift fur Naturforschung - Section C Journal of Biosciences
Volume37
Issue number1-2
DOIs
StatePublished - 1 Feb 1982

Keywords

  • Myoglobin
  • Mössbauer Effect
  • Protein Dynamic
  • Rayleigh Scattering

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