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Updated: Jun 16, 2026

Fluorescence-based Monitoring of PAD4 Activity via a Pro-fluorescence Substrate Analog

Fluorescence-based Monitoring of PAD4 Activity via a Pro-fluorescence Substrate Analog

Published on: November 5, 2014

Improved synthesis of a fluorogenic ceramidase substrate.

Zuping Xia¹, Jeremiah M Draper, Charles D Smith

¹Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, MSC 140, Charleston, SC 29425, United States. xia@musc.edu

Bioorganic & Medicinal Chemistry

|January 21, 2010

Summary

Researchers improved a method for synthesizing a key substrate used in ceramidase assays. This advancement facilitates the discovery of ceramidase inhibitors for hyperproliferative and inflammatory diseases.

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Last Updated: Jun 16, 2026

Fluorescence-based Monitoring of PAD4 Activity via a Pro-fluorescence Substrate Analog

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Published on: November 5, 2014

Use of Recombinant Fusion Proteins in a Fluorescent Protease Assay Platform and Their In-gel Renaturation

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A Fluorescence-based Protocol for Preliminary Screening of Protein Synthesis Inhibitors from Natural Sources

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Published on: January 27, 2026

Area of Science:

Biochemistry
Enzymology
Drug Discovery

Background:

Sphingolipid metabolizing enzymes, particularly ceramidases, are implicated in hyperproliferative and inflammatory diseases.
Ceramidases hydrolyze ceramide into sphingosine, a precursor to the mitogenic sphingosine 1-phosphate.
Development of ceramidase inhibitors is hindered by the lack of high-throughput screening assays.

Purpose of the Study:

To improve the synthesis of a fluorogenic ceramide analog for ceramidase assays.
To enable high-throughput screening for the identification of ceramidase inhibitors.

Main Methods:

Optimized the synthesis of a fluorogenic ceramide analog.
Incorporated hydroboration and Mitsunobu reactions.
Utilized triethylamine for improved acylation, increasing overall yield.

Main Results:

Achieved a fourfold increase in the overall yield of the ceramidase substrate.
Reduced the number of synthetic steps required.
Demonstrated the utility of the improved substrate in high-throughput screening assays for identifying ceramidase inhibitors.

Conclusions:

The enhanced synthesis of the fluorogenic ceramide analog significantly improves efficiency and yield.
This improved substrate is suitable for high-throughput screening.
The optimized method will accelerate the discovery of novel ceramidase inhibitors for therapeutic applications.