Optical, EPR and Mössbauer spectroscopic studies on the NO derivatives of cytochrome cd1 from Thiobacillus denitrificans.
Optical, EPR and Mössbauer spectroscopic studies on the NO derivatives of cytochrome cd1 from Thiobacillus denitrificans.
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对脱氮硫杆菌细胞色素 cd1 的 NO 衍生物进行光学、EPR 和穆斯堡尔光谱研究。
DOI:
10.1111/j.1432-1033.1987.tb13605.x
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发表时间:
1987
期刊:
影响因子:
--
通讯作者:
Legall,J
中科院分区:
文献类型:
--
作者:
Liu,MC;Huynh,BH;Payne,WJ;PeckJr,HD;Dervartanian,DV;Legall,J
We have used optical, EPR and Mössbauer spectroscopies to study the formation of heme‐NO complex upon the addition of nitrite to reduced cytochromecd1fromThiobacillus denitrificans. The reducedd1heme binds NO under both alkaline and acidic conditions, but the binding of NO to the reducedcheme was strongly pH‐dependent. The Mössbauer data showed unambiguously that at pH 7.6 thecheme does not complex NO, whereas at pH 5.8 approximately half of the reducedcheme binds NO. This observation was confirmed by EPR studies, which showed that the spin concentration of the heme‐NO EPR signal increased from 2 spins/molecule at pH 8.0 to approximately 3 spins/molecuie at pH 5.8. Optical absorption study also showed strong pH dependence in the binding of NO to the reducedcheme. We have also analyzed the Mössbauer spectra of the ferrousd1heme‐NO complex using a spin‐Hamiltonian formalism. The magnetic hyperfine coupling tensor was found to be consistent with the unpaired electron residing on a σ orbital.
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DOI:
--
发表时间:
1979
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
W. Zumft;B. Sherr;William J. Payne
通讯作者:
William J. Payne
DOI:
--
发表时间:
1978
期刊:
Journal of Biochemistry (Tokyo)
影响因子:
--
作者:
H. Shimada;Y. Orii
通讯作者:
Y. Orii
影响因子:
1.5
作者:
V. Sawhney;D. Nicholas
通讯作者:
D. Nicholas
DOI:
10.1016/0005-2744(69)90425-2
发表时间:
1969
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
N. Newton
通讯作者:
N. Newton
DOI:
10.1016/0005-2728(82)90188-8
发表时间:
1982
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
W. Zumft;K. Frunzke
通讯作者:
K. Frunzke