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Histone demethylation catalysed by LSD1 is a flavin-dependent oxidative process.
Federico Forneris1, Claudia Binda, Maria Antonietta Vanoni
1Dipartimento di Genetica e Microbiologia, Università di Pavia, Via Ferrata 1, 27100 Pavia, Italy.
FEBS Letters
|April 7, 2005
Summary
The histone demethylase LSD1 (lysine-specific histone demethylase 1) uses flavin to remove methyl groups. Researchers found it may use alternative electron acceptors besides oxygen in vivo.
Area of Science:
- Biochemistry
- Epigenetics
- Enzymology
Background:
- Lysine-specific histone demethylase 1 (LSD1) is a recently identified enzyme.
- LSD1 plays a crucial role in epigenetic regulation by removing methyl groups from histone 3 at Lysine 4 (H3K4).
Purpose of the Study:
- To investigate the functional properties of LSD1.
- To elucidate the mechanism of histone demethylation catalyzed by LSD1.
- To identify the electron acceptor involved in the LSD1 catalytic cycle.
Main Methods:
- Biochemical assays to study enzyme kinetics.
- Characterization of the flavin-dependent oxidation mechanism.
- Investigation of substrate utilization as electron acceptors.
Main Results:
- Histone demethylation by LSD1 is a flavin-catalyzed oxidation process.
- LSD1 utilizes oxygen as an electron acceptor, producing hydrogen peroxide.
- The oxidase activity of LSD1 is less pronounced compared to other flavin-dependent oxidases.
Conclusions:
- LSD1's catalytic mechanism involves flavin-dependent oxidation of methylated lysine.
- While LSD1 can use oxygen, its reduced oxidase activity suggests potential alternative in vivo electron acceptors.
- Further research is needed to identify alternative electron acceptors for LSD1 in cellular environments.