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Related Experiment Video

Updated: Jun 13, 2026

Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells

Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells

Published on: September 1, 2019

Dimer-tetramer transition controls RUNX1/ETO leukemogenic activity.

Christian Wichmann¹, Yvonne Becker, Linping Chen-Wichmann

¹Institute for Biomedical Research, Georg-Speyer-Haus, Paul-Ehrlich-Strasse 42-44, Frankfurt, Germany. c.wichmann@em.uni-frankfurt.de

|May 1, 2010

Summary

This summary is machine-generated.

Targeting the RUNX1/ETO fusion protein

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Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells

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Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

Published on: June 27, 2020

Area of Science:

Hematology
Molecular Biology
Oncology

Background:

RUNX1/ETO is a common fusion protein in acute myeloid leukemia (AML).
The ETO nervy homology region 2 (NHR2) is crucial for RUNX1/ETO's oncogenic function.
Understanding NHR2's role in protein complex formation is key to AML therapy.

Purpose of the Study:

To investigate the specific amino acids in the NHR2 domain responsible for RUNX1/ETO tetramer stability.
To determine the functional consequences of disrupting RUNX1/ETO tetramerization on its oncogenic activity.

Main Methods:

Analysis of amino acid contributions to the RUNX1/ETO dimer-tetramer transition using biophysical methods.
Site-directed mutagenesis to substitute key amino acids within the NHR2 domain.
Assessment of DNA binding, gene expression changes, and leukemogenic potential in cellular and murine models.

Main Results:

Identified a 5-amino acid "hot spot" in the NHR2 domain critical for RUNX1/ETO tetramer formation.
Substitution of these amino acids abolished tetramerization but preserved dimerization.
RUNX1/ETO dimers showed significantly reduced DNA binding and failed to induce myeloid differentiation arrest or leukemia in vivo.

Conclusions:

The NHR2 dimer-tetramer interface is essential for RUNX1/ETO's leukemogenic activity.
Disrupting tetramer formation offers a potential therapeutic strategy for t(8;21) AML.
Targeting this structural motif could lead to novel treatments for acute myeloid leukemia.