ISSN:
0392-6737
Keywords:
Molecular biophysics
;
Nuclear quadrupole resonance (NQR)
;
Mössbauer spectra
;
Conference proceedings
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Summary A self-consistent description of the EPR spectra and of the Mössbauer spectra of the natural superoxide dismutase fromPropionibacterium shermanii with ferric iron as an active centre is presented. The spectra were measured atpH 6.5, 7.8 and 9.4. The theoretical approach is based on the use of the complete crystal field Hamiltonian for the high-spin ferric complexes with due regard for the terms of the fourth power of the electronic spin. It is shown that a SOD molecule can exist in two conformations. The low-pH conformation has predominantly trigonal symmetry, while the high-pH conformation has the symmetry close to the «extreme rhombic». This interpretation is in full agreement with EXAFS structural data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02458892
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