Pyrene excimer fluorescence as a probe of protein conformational change.

Pyrene excimer fluorescence as a probe of protein conformational change.
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芘准分子荧光作为蛋白质构象变化的探针。

DOI:
10.1007/978-1-4899-1727-0_5
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发表时间:
1995
期刊:
Sub-cellular biochemistry.
影响因子:
--
通讯作者:
Lehrer,SS
Lehrer,SS
中科院分区:
--
文献类型:
--
作者:
Lehrer,SS

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荧光探针在蛋白质构象和相互作用的研究中是有用的,因为具有各种荧光性质的荧光体的可用性,具有不同标记特异性的衍生物,并且因为优秀的荧光仪器的可及性(Haugland,1992; Lakowicz,1983)。荧光团的衍生物可以连接到蛋白质的特定氨基酸残基,同时保持母体发色团的光谱特性。可以获得关于探针所连接的蛋白质结构域的信息,因为灵敏的荧光性质取决于激发态的性质。由于激发态的电子分布比基态的电子分布极性更大,因此探针可以与周围环境强烈相互作用,从而允许使用各种荧光测量:(1)光谱特性取决于周围环境的极性;(2)相对量子产率或强度取决于淬灭基团的接近程度;(3)相对探针暴露的变化可以通过溶质淬灭技术获得;(4)作为荧光能量供体,
Fluorescence probes are useful in studies of protein conformation and interactions because of the availability of fluorophors with a variety of fluorescence properties, of derivatives with different labeling specificities, and because of the accessibility of excellent fluorescence instruments (Haugland, 1992; Lakowicz, 1983). Derivatives of the fluorophor can be attached to specific amino acid residues of proteins while maintaining the spectroscopic properties of the parent chromophore. Information about the protein domain to which the probe is attached can be obtained because the sensitive fluorescence properties depend on the nature of the excited state. Due to the more polar electron distribution in the excited state than the ground state, the probe can interact strongly with the immediate environment, allowing for the use of a variety of fluorescence measurements:(I) the spectral characteristics depend on the polarity of the immediate environment;(2) the relative quantum yield or intensity depends on the proximity of quenching groups;(3) changes in relative probe exposure can be obtained by solute quenching techniques;(4) as fluorescence energy'donors and
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