Fittipaldi Maria, Warmerdam Gertrud C M, de Waal Ellen C, Canters Gerard W, Cavazzini Davide, Rossi Gian Luigi, Huber Martina, Groenen Edgar J J
Department of Molecular Physics, Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands.
Chemphyschem. 2006 Jun 12;7(6):1286-93. doi: 10.1002/cphc.200500551.
A 95 GHz pulsed deuterium ENDOR study has been performed on single crystals of azurin from Pseudomonas aeruginosa selectively deuterated at the C(beta) position of the copper-coordinating cysteine 112. Complete hyperfine tensors of the two deuterium atoms have been obtained, which reveal identical isotropic parts. Analysis of the hyperfine tensors provides insight into the spin-density delocalization over the cysteine ligand. Approximately 45 % of the spin density in the paramagnetic site can be attributed to copper and 30 % to sulfur.
对来自铜绿假单胞菌的天青蛋白单晶进行了95吉赫兹脉冲氘电子核双共振（ENDOR）研究，该单晶在铜配位半胱氨酸112的C（β）位置选择性氘化。已获得两个氘原子的完整超精细张量，其显示出相同的各向同性部分。对超精细张量的分析有助于深入了解半胱氨酸配体上的自旋密度离域情况。顺磁位点中约45%的自旋密度可归因于铜，30%归因于硫。
