[CuI(bicinchoninic acid)2]3− | 125939-60-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吲哚及其衍生物
• 英文名称: [CuI(bicinchoninic acid)2]3−
• 英文别名: [Cu^I(bicinchoninic acid)₂]^3-；[Cu^I(Bca)₂]^3-；[Cu(bicinchoninic acid(-2H))2](3-)；[Cu(Bca)2](3-)
• CAS: 125939-60-8
• 化学式: C₄₀H₂₀CuN₄O₈
• 分子量: 748.167
• InChiKey: BXMGSLOXSFHZLE-UHFFFAOYSA-J

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  tetrakis(acetonitrile)copper(I) perchlorate 、 bicinchoninate anion 以 not given 为溶剂， 生成 [CuI(bicinchoninic acid)2]3−
  参考文献：
  名称：

  Unprecedented Binding Cooperativity between Cu^I and Cu^II in the Copper Resistance Protein CopK from Cupriavidus metallidurans CH34: Implications from Structural Studies by NMR Spectroscopy and X-Ray Crystallography

  摘要：

  The bacterium Cupriavidus metallidurans CH34 is resistant to high environmental concentrations of many metal ions, including copper. This ability arises primarily from the presence of a large plasmid pMOL30 which includes a cluster of 19 cop genes that respond to copper. One of the protein products CopK is induced at high levels and is expressed to the periplasm as a small soluble protein (8.3 kDa). Apo-CopK associates in solution to form a dimer (K(D) approximately 10(-5) M) whose structure was defined by NMR and X-ray crystallography. The individual molecules feature two antiparallel beta-sheets arranged in a sandwich-like structure and interact through C-terminal beta-strands. It binds Cu(II) with low affinity (K(D)(Cu(II)) > 10(-6) M) but Cu(I) with high affinity (K(D)(Cu(I)) = 2 x 10(-11) M). Cu(I)-CopK was also a dimer in the solid state and featured a distorted tetrahedral site Cu(I)(S-Met)(3)(NCS). The isothiocyanato ligand originated from the crystallization solution. Binding of Cu(I) or Ag(I), but not of Cu(II), favored the monomeric form in solution. While Ag(I)-CopK was stable as isolated, Cu(I)-CopK was moderately air-sensitive due to a strong binding cooperativity between Cu(I) and Cu(II). This was documented by determination of the Cu(I) and Cu(II) binding affinities in the presence of the other ion: K(D)(Cu(I)) = 2 x 10(-13) M and K(D)(Cu(II)) = 3 x 10(-12) M, that is, binding of Cu(II) increased the affinity for Cu(I) by a factor of approximately 10(2) and binding of Cu(I) increased the affinity for Cu(II) by a factor of at least 10(6). Stable forms of both Cu(I)Cu(II)-CopK and Ag(I)Cu(II)-CopK were isolated readily. Consistent with this unprecedented copper binding chemistry, NMR spectroscopy detected three distinct forms: apo-CopK, Cu(I)-CopK and Cu(I)Cu(II)-CopK that do not exchange on the NMR time scale. This information provides a valuable guide to the role of CopK in copper resistance.

  DOI：

  10.1021/ja807354z