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Detection of Thiol Functionality and Disulfide Bond Formation by Polyoxometalate
ACS Combinatorial Science Pub Date : 2020-10-08 , DOI: 10.1021/acscombsci.0c00176
Hiroyuki Konno 1 , Haruto Yasumiishi 1 , Reika Aoki 1 , Ikumi Nitanai 1 , Shigekazu Yano 1
Affiliation  

The detection of thiol functionality and intramolecular disulfide bond formation of peptides using the α-Keggin type polyoxometalate molybdenum–oxygen cluster (H3PMo12O40·nH2O) is described. Our method entails the addition of this polyoxometalate to solutions of thiol, whereupon the color of the solution changes from colorless to deep blue. Reduction of the polyoxometalate from Mo(VI) to Mo(V) occurs with concomitant oxidation of the thiol functionality, to form disulfide bonds. To exemplify the utility this phenomenon, we accomplished the oxidation of glutathione, reduced linear oxytocin, bactenecin, and α-conotoxin SI; all of which proceeded smoothly and in good conversion in 24 h to less and were accomplished by a change in the color of the reaction solutions.

中文翻译:

多金属氧酸盐检测硫醇官能度和二硫键形成

使用α-Keggin型多金属氧酸盐钼-氧簇(H 3 PMo 12 O 40 · n H 2O) 进行了描述。我们的方法需要将这种多金属氧酸盐添加到硫醇溶液中,因此溶液的颜色从无色变为深蓝色。多金属氧酸盐从 Mo (VI) 还原为 Mo (V) 伴随着硫醇官能团的氧化,形成二硫键。为了举例说明这种现象的效用,我们完成了谷胱甘肽、还原线性催产素、杆菌肽和 α-芋螺毒素 SI 的氧化;所有这些都顺利进行,并且在 24 小时内转化率良好,并且通过反应溶液颜色的变化来实现。
更新日期:2020-12-14
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