A W-band electron spin echo envelope modulation study of a single crystal of azurin

被引：42

作者：

Coremans, JWA

Poluektov, OG

Groenen, EJJ

Canters, GW

Nar, H

Messerschmidt, A

机构：

[1] LEIDEN UNIV, HUYGENS LAB, CTR STUDY EXCITED STATES MOL, NL-2300 RA LEIDEN, NETHERLANDS

[2] LEIDEN UNIV, LEIDEN INST CHEM, GORLAEUS LABS, NL-2300 RA LEIDEN, NETHERLANDS

[3] MAX PLANCK INST BIOCHEM, D-82152 MARTINSRIED, GERMANY

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1997年 / 119卷 / 20期

关键词：

D O I：

10.1021/ja9638420

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

At 95 GHz, deep electron spin echo envelope modulations of ct single crystal of the blue copper protein azurin have been observed. The modulations arise from the coordinated nitrogens of the histidines that ligate to copper. From the ESEEM frequencies, hyperfine and quadrupole tensors of these nitrogens have been deduced. The isotropic hyperfine coupling of the copper-bound nitrogen of histidine-117 is 1.4 times larger than that of histidine-46. The anisotropic hyperfine tensors show that the wave function of the unpaired electron on both coordinated nitrogens mainly concerns the sigma bonds with copper.

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页码：4726 / 4731

页数：6

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