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Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining

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Published on: February 25, 2021

Structural insights into heparanase activity using a fluorogenic heparan sulfate disaccharide.

Liang Wu¹, Norbert Wimmer², Gideon J Davies¹

¹Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK. gideon.davies@york.ac.uk.

Chemical Communications (Cambridge, England)

|October 19, 2020

Summary

Researchers developed a new fluorogenic substrate to study heparanase enzyme activity and inhibition. This work reveals the enzyme's catalytic mechanism and informs the design of better heparanase inhibitors.

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Area of Science:

Biochemistry
Enzymology
Structural Biology

Background:

Heparanase is a key enzyme involved in cancer metastasis and inflammation.
Understanding its catalytic mechanism is crucial for developing targeted therapies.

Purpose of the Study:

To assess a synthetic heparan sulfate disaccharide as a novel fluorogenic substrate for heparanase.
To gain structural insights into heparanase-substrate interactions.
To inform the design of improved heparanase inhibitors.

Main Methods:

Enzyme kinetics assays using a novel fluorogenic substrate.
X-ray crystallography to determine the structure of human heparanase with the substrate.
Analysis of substrate conformation and enzyme-binding interactions.

Main Results:

The synthetic disaccharide functions as a viable fluorogenic substrate for heparanase, enabling kinetic studies.
The crystal structures provide the first observation of heparanase with a substrate in an activated 1S3 conformation.
Novel interactions between the enzyme and substrate were identified, shedding light on the catalytic mechanism.

Conclusions:

The developed substrate is valuable for studying heparanase activity and inhibition.
Structural data reveals key aspects of heparanase substrate binding and activation.
This research provides a foundation for designing more effective heparanase inhibitors for therapeutic applications.