Time-resolved magnetic circular dichroism spectroscopy of photolyzed carbonmonoxy cytochrome c oxidase (cytochrome aa3).
Time-resolved magnetic circular dichroism spectroscopy of photolyzed carbonmonoxy cytochrome c oxidase (cytochrome aa3).
复制标题
光解碳单氧基细胞色素 c 氧化酶(细胞色素 aa3)的时间分辨磁圆二色光谱。
DOI:
10.1016/s0006-3495(91)82036-7
复制
发表时间:
1991
影响因子:
3.4
通讯作者:
Kliger,DS
中科院分区:
文献类型:
--
作者:
Goldbeck,RA;Dawes,TD;Einarsdottir,O;Woodruff,WH;Kliger,DS
Nanosecond time-resolved magnetic circular dichroism (TRMCD) and time-resolved natural circular dichroism (TRCD) measurements of photolysis products of the CO complex of eukaryotic cytochrome c oxidase (CcO-CO) are presented. TRMCD spectra obtained at 100 ns and 10 microseconds after photolysis are diagnostic of pentacoordinate cytochrome a3Fe2+, as would be expected for simple photodissociation. Other time-resolved spectroscopies (UV-visible and resonance Raman), however, show evidence for unusual Fea3(2+) coordination after CO photolysis (Woodruff, W. H., O. Einarsdóttir, R. B. Dyer, K. A. Bagley, G. Palmer, S. J. Atherton, R. A. Goldbeck, T. D. Dawes, and D. S. Kliger. 1991. Proc. Nat. Acad. Sci. U.S.A. 88:2588–2592). Furthermore, time-resolved IR experiments have shown that photodissociated CO binds to CuB+ prior to recombining with Fea3(2+) (Dyer, R. B., O. Einarsdóttir, P. M. Killough, J. J. López-Garriga, and W. H. Woodruff. 1989. J. Am. Chem. Soc. 111:7657–7659). A model of the CcO-CO photolysis cycle which is consistent with all of the spectroscopic results is presented. A novel feature of this model is the coordination of a ligand endogenous to the protein to the Fe axial site vacated by the photolyzed CO and the simultaneous breaking of the Fe-imidazole(histidine) bond.
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DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Einarsdóttir,O;Killough,PM;Fee,JA;Woodruff,WH
通讯作者:
Woodruff,WH
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Carter,K;Palmer,G
通讯作者:
Palmer,G
影响因子:
4.8
作者:
G. Babcock;L. Vickery;G. Palmer
通讯作者:
G. Palmer
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
R. A. Goldbeck;T. D. Dawes;S. J. Milder;J. Lewis;D. Kliger
通讯作者:
D. Kliger
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
M. Wikström;M. Saraste;T. Penttilä
通讯作者:
T. Penttilä