LSD1 Substrate Binding and Gene Expression Are Affected by HDAC1-Mediated Deacetylation

Area of Science:

• Epigenetics
• Molecular Biology
• Cancer Research

Background:

• Lysine Specific Demethylase 1 (LSD1) regulates gene expression and is implicated in cancer development.
• LSD1 functions alongside histone deacetylase (HDAC) enzymes, but their functional relationship is unclear.
• Targeting LSD1 is a promising strategy for anticancer drug development.

Purpose of the Study:

• To elucidate the functional link between HDAC1 and LSD1.
• To identify LSD1 as a direct substrate of HDAC1.
• To understand how HDAC1-mediated modification affects LSD1 activity.

Main Methods:

• Utilized a substrate trapping strategy with inactive HDAC1 mutants.
• Identified cellular substrates of HDAC1.
• Characterized the effect of HDAC1-mediated deacetylation on LSD1.

Main Results:

• Identified Lysine Specific Demethylase 1 (LSD1) as a substrate of HDAC1.
• Demonstrated that HDAC1 deacetylates LSD1 at lysine 374 (K374).
• Showed that this deacetylation impacts LSD1's histone binding and gene expression regulation.

Conclusions:

• Established a direct mechanistic link between HDAC1 and LSD1 activity.
• HDAC inhibitors can modulate LSD1 function, impacting gene expression.
• This provides a basis for rational drug design targeting epigenetic enzymes in cancer therapy.