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Updated: May 5, 2026
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Mutagenesis and Functional Analysis of Ion Channels Heterologously Expressed in Mammalian Cells
Published on: October 1, 2010
18.0K
Structural and Biophysical Analyses of Human Prostamide/Prostaglandin F Synthase with Two Active Form-Mimicking
Sang Won Cheon1, Yen Thi Kim Nguyen1, Jin Mo Kang1
1Research Institute of Pharmaceutical Sciences & Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea.
Biomolecules
|February 27, 2026
Summary
Human prostamide/prostaglandin F synthase (PGFS) structure was determined using a double mutant. This reveals PGFS as a distinct, redox-regulated enzyme, offering new therapeutic targets for conditions like glaucoma.
Area of Science:
- Biochemistry
- Structural Biology
- Enzymology
Background:
- Human prostamide/prostaglandin F synthase (PGFS) is crucial for regulating intraocular pressure and labor.
- Limited structural and biochemical data exist for human PGFS due to crystallization and substrate stability challenges.
Purpose of the Study:
- To elucidate the structure and mechanism of human PGFS.
- To provide molecular insights into PGFS as a potential therapeutic target.
Main Methods:
- Crystal structure determination of a C44S/C47S double mutant (DM) mimicking the reduced active form.
- Analysis of B-factors and molecular dynamics (MD) simulations.
- Circular dichroism (CD) spectroscopy to assess structural changes upon activation and ligand binding.
Main Results:
- The PGFS DM structure exhibits a thioredoxin-like fold with a flexible Tyr108-Asp124 region.
- A unique trans-conformation at Pro167 influences Arg40 localization and charge near the active site.
- Redox activation enhances thermal stability but increases structural disorder upon ligand binding.
Conclusions:
- PGFS is a structurally distinct enzyme regulated by redox state.
- The findings offer novel molecular insights into PGFS's function and therapeutic potential.
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