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Updated: Jun 5, 2026

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Published on: April 6, 2017
Design and application of esterase-labile sulfonate protecting groups
Laert Rusha1, Stephen C Miller
1Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation St., Worcester, MA 01605, USA.
Researchers developed three new sulfonate protecting groups. One group successfully delivered and activated a dye inside living cells, demonstrating its potential for cellular imaging.
Area of Science:
- Organic Chemistry
- Chemical Biology
- Cellular Imaging
Background:
- Developing novel chemical tools is crucial for advancing cellular research.
- Protecting groups are essential for controlled chemical reactions and delivery.
- Sulfonate esters offer unique chemical properties for molecular design.
Purpose of the Study:
- To design and synthesize novel esterase-labile sulfonate protecting groups.
- To evaluate the chemical stability and cleavage properties of these new compounds.
- To assess the efficacy of a sulfonate ester for intracellular delivery and unmasking of a functional molecule.
Main Methods:
- Chemical synthesis of three distinct sulfonate ester derivatives.
- Stability assays to confirm chemical robustness under physiological conditions.
- Live-cell imaging experiments utilizing a sulfonated dye conjugated to a sulfonate ester.
Main Results:
- Successful synthesis of three chemically stable sulfonate protecting groups.
- Demonstration of esterase-mediated cleavage of the sulfonate esters.
- Effective cytoplasmic delivery and subsequent unmasking of a sulfonated dye in live cells.
Conclusions:
- The designed sulfonate protecting groups are chemically stable yet cleavable by esterases.
- One sulfonate ester enables efficient intracellular delivery and activation of a sulfonated dye.
- These novel protecting groups hold promise for applications in live-cell imaging and drug delivery.
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