Multifunctional acyltransferase HBO1: a key regulatory factor for cellular functions.

Area of Science:

• Biochemistry
• Molecular Biology
• Epigenetics

Background:

• HBO1 (Histone acetyltransferase type B catalytic subunit 1), also known as KAT7 or MYST2, is a key enzyme involved in histone acetylation.
• HBO1 functions in complexes with various cofactors, including MEAF6, ING proteins, and JADE/BRPF proteins, to modify histones H3 and H4.

Purpose of the Study:

• To review recent advancements in understanding the multifaceted roles of HBO1.
• To highlight HBO1's involvement in acylation, DNA replication, ubiquitination, immunity, and stem cell renewal.

Main Methods:

• Literature review of recent studies on HBO1 function.
• Analysis of HBO1's enzymatic activities and protein interactions.
• Examination of HBO1's roles in cellular processes and disease.

Main Results:

• HBO1 mediates histone acetylation crucial for DNA replication and gene expression.
• HBO1 catalyzes diverse protein acylation and acts as an E3 ubiquitin ligase for ERα.
• HBO1 is essential for immune tolerance, stem cell renewal, and neural development.

Conclusions:

• HBO1's diverse functions underscore its significance in normal cellular processes.
• Overexpression of HBO1 in cancers suggests its oncogenic potential.
• HBO1 represents a promising therapeutic target for cancer treatment.