These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
10 files

An Activity-Based Fluorescent Sensor for the Detection of the Phenol Sulfotransferase SULT1A1 in Living Cells

submitted on 19.11.2020, 00:00 and posted on 19.11.2020, 13:18 by Regina A. Baglia, Kira Mills, Koushambi Mitra, Jasmine Tutol, Darby Ball, Kierstin Page, Jyothi Kallu, Sriharika Gottipolu, Sheena D’Arcy, Steven O. Nielsen, Sheel Dodani

The biological activation and incorporation of inorganic sulfate proceeds via a process known as sulfurylation. Transfer of a sulfuryl moiety from the activated sulfate donor, 3’-phosphoadenosine-5’-phosphosulfate (PAPS), to hydroxy-containing substrates by human phenol sulfotransferases (SULT1 family) alters substrate solubility and charge to affect the metabolism of endogenous metabolites, xenobiotics, and drugs. Current methods to monitor SULT1 activity in living cells primarily rely on radiolabeling and/or cell extractions, but these methods do not provide a direct readout of enzyme activity with a dynamic, temporally resolved spatial map in live, intact cells. To fill this gap, here, we present the development, computational modeling, in vitro enzymology, and biological application of Sulfotransferase Sensor-3, STS-3, an activity-based fluorescent sensor for SULT1A1, the most widely expressed and promiscuous SULT1 isoform.


Email Address of Submitting Author


The University of Texas at Dallas



ORCID For Submitting Author


Declaration of Conflict of Interest

A provisional patent application has been filed.