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A Magnetic Susceptibility Study of Hemerythrin Using an Ultrasensitive Magnetometer

Dawson, James W. and Gray, Harry B. and Hoenig, H. Eckhardt. and Rossman, George R. and Schredder, Jeffrey M. and Wang, Run-Han (1972) A Magnetic Susceptibility Study of Hemerythrin Using an Ultrasensitive Magnetometer. Biochemistry, 11 (3). pp. 461-465. ISSN 0006-2960. doi:10.1021/bi00753a026.

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The magnetic susceptibilities of oxy- and metaquohemerythrin in the range 3-200°K have been determined using an ultrasensitive superconducting quantum magnetometer, and for the first time their antiferromagnetic components have been conclusively resolved. The exchange coupling constants, J, between the two high-spin iron(III) atoms in each subunit are -77 and -134 cm^(-1), respectively. The electronic spectra of these two proteins in deuterium oxide have been measured from 800 to 1200 nm but no additional bands were obtained. After comparison to magnetic and spectroscopic data obtained previously for ferric dimer model complexes, it is concluded that the two iron(III) atoms in subunits of both oxy- and metaquohemerythrin are oxo bridged.

Item Type:Article
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Gray, Harry B.0000-0002-7937-7876
Rossman, George R.0000-0002-4571-6884
Additional Information:© 1972 American Chemical Society. Contribution No. 4322 from the Arthur Amos Noyes Laboratory of Chemical Physics (J. W. D., H. B. G., G. R. R., and J. M. S.) and from the Alfred P. Sloan Laboratory of Mathematics and Physics (H. E. H. and R.-H. W,), California Institute of Technology, Pasadena, California 91109. Received September 2, 1971. This investigation was supported by the National Science Foundation, the Office of Naval Research, IBM Corp., and the Deutsche Forschungsgemeinschaft. We thank Dr. S. Simon and B. Grube (Rockefeller University) for help with the initial stages of this work, and R. F. Haack (Jet Propulsion Laboratory, California Institute of Technology) for the atomic absorption analyses of iron.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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Office of Naval Research (ONR)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
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Caltech Arthur Amos Noyes Laboratory of Chemical Physics4322
Issue or Number:3
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Official Citation: Magnetic susceptibility study of hemerythrin using an ultrasensitive magnetometer James W. Dawson, Harry B. Gray, H. Eckhardt Hoenig, Goerge R. Rossman, Jeffrey M. Schredder, and Run-Han Wang Biochemistry 1972 11 (3), 461-465
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44006
Deposited By: Ruth Sustaita
Deposited On:26 Feb 2014 17:52
Last Modified:10 Nov 2021 16:46

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