Fluorescent coumarin thiols measure biological redox couples.

Fluorescent coumarin thiols measure biological redox couples.
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DOI:
10.1021/ol203105c
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发表时间:
2012-02-03
期刊:
影响因子:
5.2
通讯作者:
Murthy N
Murthy N
中科院分区:
化学1区
文献类型:
--
作者:
Reddie KG;Humphries WH;Bain CP;Payne CK;Kemp ML;Murthy N

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In this report we present a new chemical probe, 3-HTC, that can reversibly and ratiometrically measure the thioldisulfide equilibrium of biological systems. 3-HTC is composed of a coumarin that has a thiolate directly conjugated to its extended aromatic π system while formation of a disulfide attenuates this conjugation. The fluorescence and absorption properties of 3-HTC are therefore very sensitive to the redox state of its thiol. 3-HTC reacts reversibly with thiols and disulfides enabling its use to measure dynamic GSH/GSSH ratios in vitro as well as monitor the reversible redox status of whole cell lysates.
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