Related Experiment Video
Updated: Dec 14, 2025
04:30
A Colorimetric Assay of Citrate Synthase Activity in Drosophila Melanogaster
Published on: January 16, 2020
10.5K
A colorimetric assay method for measuring d-glutamate cyclase activity.
Masumi Katane1, Risa Motoda1, Makoto Ariyoshi2
1Laboratory of Biomolecular Sciences, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
Analytical Biochemistry
|July 24, 2020
Summary
A new colorimetric assay accurately measures d-glutamate cyclase (DGLUCY) activity, aiding research into d-amino acids, 5-oxo-d-proline, and cardiac function regulation.
Area of Science:
- Biochemistry
- Enzymology
- Cardiovascular Science
Background:
- Mammalian metabolism of d-glutamate is controlled by d-glutamate cyclase (DGLUCY).
- DGLUCY activity is linked to cardiac function regulation.
- Understanding DGLUCY requires reliable activity measurement methods.
Purpose of the Study:
- To develop a simple, accurate, and sensitive colorimetric assay for DGLUCY activity.
- To optimize the derivatization of 5-oxo-d-proline for colorimetric detection.
- To validate the assay's performance and suitability for biological samples.
Main Methods:
- Optimized derivatization of 5-oxo-d-proline using 2-nitrophenylhydrazine hydrochloride and a carbodiimide catalyst.
- Colorimetric determination of generated acid hydrazides.
- Comparison with high-performance liquid chromatography (HPLC) methods.
Main Results:
- Established a sensitive and accurate colorimetric assay for DGLUCY activity.
- Demonstrated the method's validity and reliability in biological samples.
- Confirmed comparable performance to HPLC-based detection.
Conclusions:
- The developed colorimetric assay provides a reliable tool for measuring DGLUCY activity.
- This method facilitates further investigation into the roles of d-glutamate, 5-oxo-d-proline, and DGLUCY in cardiac physiology and pathology.
