Electron tunneling in ruthenium-modified cytochromec

Deborah S. Wuttke, Morten J. Bjerrum, I. Jy Chang, Jay R. Winkler, Harry B. Gray*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

54 引文 斯高帕斯(Scopus)

摘要

Distant Fe2+-Ru3+ electronic couplings have been extracted from intramolecular electron-transfer rates in Ru(2,2′-bipyridine)2(imidazole)(histidine-X)2+ (X = 33,39,62,72,79) derivatives of cytochromec. The rates are 〉 1 · 108 (79); 3.2(4) · 106 (39); 2.6(3) · 106 (33); 9.0(3) · 105 (72); 1.0(2) · 104 s−1 (62); the couplings increase according to 62 (0.006) < 72 (0.057) < 33 (0.097) < 39 (0.11) < 79 (〉 0.6 cm−1). The rates (and the couplings) correlate with the lengths of σ-tunneling pathways comprised of covalent bonds, hydrogen bonds, and through-space jumps from the histidines to the heme group.

原文英語
頁(從 - 到)168-170
頁數3
期刊Biochimica et Biophysica Acta - Bioenergetics
1101
發行號2
DOIs
出版狀態已發佈 - 1992

ASJC Scopus subject areas

  • 生物物理學
  • 生物化學
  • 細胞生物學

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