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Updated: Jul 20, 2025

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SETD1A function in leukemia is mediated through interaction with mitotic regulators BuGZ/BUB3.

Sarah Perlee1,2, Sota Kikuchi3, Tomoyoshi Nakadai4

  • 1Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

EMBO Reports
|August 3, 2023
PubMed
Summary
This summary is machine-generated.

The SETD1A protein is vital for leukemia cell survival by interacting with cyclin K and BuGZ/BUB3 proteins. Inhibiting these interactions synergistically halts leukemia cell growth, offering new therapeutic targets.

Keywords:
BuGZDNA repairLeukemiaSETD1ATranscription

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Area of Science:

  • Molecular Biology
  • Cancer Biology
  • Epigenetics

Background:

  • The H3K4 methyltransferase SETD1A is essential for leukemia cell survival.
  • SETD1A's noncatalytic FLOS domain mediates interactions with cyclin K and regulates DNA damage response genes.

Purpose of the Study:

  • To identify functional nuclear localization signals and interaction partners of the SETD1A FLOS domain.
  • To investigate the role of SETD1A-BuGZ/BUB3 interactions in leukemia.

Main Methods:

  • Protein interaction screening using the SETD1A FLOS domain.
  • Functional assays involving inhibition of SETD1A interaction motifs.
  • Cell-cycle-specific SETD1A restoration assays.

Main Results:

  • The SETD1A FLOS domain binds mitosis-associated proteins BuGZ/BUB3.
  • Inhibition of cyclin K and BuGZ/BUB3 binding motifs shows synergistic antileukemic effects.
  • BuGZ/BUB3 localize to specific regulatory regions, and their interaction with SETD1A is crucial for proliferation.

Conclusions:

  • SETD1A interacts with BuGZ/BUB3, contributing to leukemia cell survival and proliferation.
  • Targeting SETD1A interactions with cyclin K and BuGZ/BUB3 offers a potential synergistic therapeutic strategy for leukemia.
  • SETD1A expression during the G1/S phase is critical for DNA damage response and cell cycle progression in leukemia.