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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Stabilization of Cu(I) for binding and calorimetric measurements in aqueous solution
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Stabilization of Cu(I) for binding and calorimetric measurements in aqueous solution

机译:稳定Cu(I)用于水溶液中的结合和量热测量

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Conditions have been developed for the comproportionation reaction of Cu2+ and copper metal to prepare aqueous solutions of Cu+ that are stabilized from disproportionation by MeCN and other Cu+-stabilizing ligands. These solutions were then used in ITC measurements to quantify the thermodynamics of formation of a set of Cu+ complexes (Cu-I( MeCN)(3)(+), Cu(I)Me(6)Trien(+), Cu-I(BCA)(2)(3-), Cu-I(BCS)(2)(3-)), which have stabilities ranging over 15 orders of magnitude, for their use in binding and calorimetric measurements of Cu+ interaction with proteins and other biological macromolecules. These complexes were then used to determine the stability and thermodynamics of formation of a 1 : 1 complex of Cu+ with the biologically important tri-peptide glutathione, GSH. These results identify Me(6)Trien as an attractive Cu+-stabilizing ligand for calorimetric experiments, and suggest that caution should be used with MeCN to stabilize Cu+ due to its potential for participating in unquantifiable ternary interactions.
机译:已经开发了用于Cu 2+和铜金属的歧化反应以制备Cu +水溶液的条件,所述Cu +水溶液通过MeCN和其他稳定Cu +的配体的歧化作用得以稳定。然后将这些溶液用于ITC测量以量化形成一组Cu +配合物(Cu-I(MeCN)(3)(+),Cu(I)Me(6)Trien(+),Cu-I (BCA)(2)(3-),Cu-I(BCS)(2)(3-)),具有超过15个数量级的稳定性,可用于结合+量热测量Cu +与蛋白质和蛋白质的相互作用其他生物大分子。然后将这些复合物用于确定形成具有生物学上重要的三肽谷胱甘肽GSH的Cu + 1:1复合物的稳定性和热力学。这些结果表明Me(6)Trien是用于量热实验的有吸引力的Cu +稳定配体,并建议应谨慎使用MeCN来稳定Cu +,因为它可能参与不可量化的三元相互作用。

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