Catalysis by protein acetyltransferase Gcn5.

Area of Science:

• Biochemistry
• Molecular Biology
• Epigenetics

Background:

• Gcn5 is the defining member of the Gcn5-related N-acetyltransferase (GNAT) superfamily.
• Protein acetylation, particularly on histones, is a crucial post-translational modification regulating cellular processes.
• Gcn5's structure-function studies provide insights into the broader protein acetyltransferase family.

Purpose of the Study:

• To review the fundamental understanding of Gcn5's catalytic mechanisms.
• To explore the regulation of Gcn5 activity and its substrate selection.
• To discuss the development of inhibitors targeting Gcn5 and related enzymes.

Main Methods:

• Literature review of existing studies on Gcn5 and GNATs.
• Analysis of structural and functional data.
• Synthesis of information on catalysis, regulation, and inhibitor design.

Main Results:

• Gcn5 acetylates the lysine residue on histones, a key epigenetic regulator.
• Protein acetylation affects thousands of proteins, reversibly modulating cellular functions.
• Understanding Gcn5 is foundational for comprehending the entire acetyltransferase family.

Conclusions:

• Gcn5 is an archetypal enzyme with broad implications for understanding protein acetylation.
• Further research into Gcn5's regulation and inhibition can yield therapeutic strategies.
• The GNAT superfamily's catalytic mechanisms and substrate specificities are areas of active investigation.