Anion binding to a cationic europium(III) probe enables the first real-time assay of heparan sulfotransferase activity.

Anion binding to a cationic europium(III) probe enables the first real-time assay of heparan sulfotransferase activity.
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DOI:
10.1039/d1ob02071d
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发表时间:
2022-01-19
影响因子:
3.2
通讯作者:
Butler SJ
Butler SJ
中科院分区:
化学3区
文献类型:
--
作者:
Wheeler S;Breen C;Li Y;Hewitt SH;Robertson E;Yates EA;Barsukov IL;Fernig DG;Butler SJ

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硫转移酶是一类普遍存在的酶,由于缺乏一种方便的工具来筛选其活性,人们对其知之甚少。这些酶使用阴离子PAPS(腺苷-3 ' -磷酸-5 ' -硫酸磷酸)作为广泛的受体底物(包括碳水化合物)的供体,产生硫酸化物和PAP(腺苷-3 ',5 ' -二磷酸)作为副产物。我们提出了一种基于铕(iii)的探针,它可以可逆地结合PAPS和PAP,与后者阴离子产生更大的发光增强。我们利用PAP的这种更大的发射增强来演示首次使用多孔板格式直接实时测定硫酸肝素硫转移酶。我们的探针对PAP在结构相似的核苷磷酸阴离子和其他阴离子上的选择性反应进行了研究和讨论。这项工作开启了更全面地研究这类酶在健康和疾病中所起作用的可能性,包括操作简单的抑制剂筛选。我们提出了一个新的发光铕(iii)基阴离子受体结合PAP(腺苷-3 ',5 ' -二磷酸)。受体- pap复合物的发射强度和寿命的增加被用于开发肝素硫转移酶活性的第一个实时检测。
Sulfotransferases constitute a ubiquitous class of enzymes which are poorly understood due to the lack of a convenient tool for screening their activity. These enzymes use the anion PAPS (adenosine-3′-phosphate-5′-phosphosulfate) as a donor for a broad range of acceptor substrates, including carbohydrates, producing sulfated compounds and PAP (adenosine-3′,5′-diphosphate) as a side product. We present a europium(iii)-based probe that binds reversibly to both PAPS and PAP, producing a larger luminescence enhancement with the latter anion. We exploit this greater emission enhancement with PAP to demonstrate the first direct real-time assay of a heparan sulfate sulfotransferase using a multi-well plate format. The selective response of our probe towards PAP over structurally similar nucleoside phosphate anions, and over other anions, is investigated and discussed. This work opens the possibility of investigating more fully the roles played by this enzyme class in health and disease, including operationally simple inhibitor screening. We present a new luminescent europium(iii)-based anion receptor that binds to PAP (adenosine-3′,5′-diphosphate). The increased emission intensity and lifetime of the receptor-PAP complex was used to develop the first real-time assay of heparan sulfotransferase activity.
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影响因子: --
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