Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy

E. R. Bauminger; S. G. Cohen; I. Nowik; S. Ofer; J. Yariv

doi:10.1007/BF02147385

Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy

E. R. Bauminger^*
, S. G. Cohen
, I. Nowik
, S. Ofer
, J. Yariv

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A careful investigation of Mössbauer absorption of⁵⁷Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040Å² and <x₁²> = 0.016Å².

Original language	English
Pages (from-to)	881-884
Number of pages	4
Journal	Hyperfine Interactions
Volume	16
Issue number	1-4
DOIs	https://doi.org/10.1007/BF02147385
State	Published - Dec 1983

Access to Document

10.1007/BF02147385

Cite this

@article{0faac89a88da45a8aa2d446e19e7781b,

title = "Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy",

abstract = "A careful investigation of M{\"o}ssbauer absorption of57Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040{\AA}2 and 12> = 0.016{\AA}2.",

author = "Bauminger, \{E. R.\} and Cohen, \{S. G.\} and I. Nowik and S. Ofer and J. Yariv",

year = "1983",

month = dec,

doi = "10.1007/BF02147385",

language = "אנגלית",

volume = "16",

pages = "881--884",

journal = "Hyperfine Interactions",

issn = "0304-3834",

publisher = "Springer Nature",

number = "1-4",

}

TY - JOUR

T1 - Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy

AU - Bauminger, E. R.

AU - Cohen, S. G.

AU - Nowik, I.

AU - Ofer, S.

AU - Yariv, J.

PY - 1983/12

Y1 - 1983/12

N2 - A careful investigation of Mössbauer absorption of57Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040Å2 and 12> = 0.016Å2.

AB - A careful investigation of Mössbauer absorption of57Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040Å2 and 12> = 0.016Å2.

UR - https://www.scopus.com/pages/publications/34250154794

U2 - 10.1007/BF02147385

DO - 10.1007/BF02147385

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:34250154794

SN - 0304-3834

VL - 16

SP - 881

EP - 884

JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy

Abstract

Access to Document

Other files and links

Fingerprint

Cite this