P/CAF and GCN5 acetylate the AML1/MDS1/EVI1 fusion oncoprotein

Biochem Biophys Res Commun. 2003 Aug 8;307(4):980-6. doi: 10.1016/s0006-291x(03)01288-9.


Lysine acetyltransferases modulate the activity of many genes by modifying the lysine residues of both core histones and transcription-related factors. These modifications are tightly controlled in the cell because they are involved in vital processes such as cell cycle progression, differentiation, and apoptosis. Therefore, any deregulation of acetylation/deacetylation equilibrium or inappropriate modifications could lead to different diseases. Since previous studies have shown that some oncoproteins also undergo this modification, acetylation could be involved in the processes of cell transformation and oncogenesis. Here, we report that AML1/MDS1/EVI1 (AME), a repressor produced by the t(3;21) associated with human leukemia, physically interacts with the acetyltransferases P/CAF and GCN5. Our data suggest that AME has at least two binding sites for these acetyltransferases, one of which is in the Runt domain. Both P/CAF and GCN5 efficiently acetylate AME in vivo in the central region. AME acetylation has no effect on its interaction with the co-repressor CtBP1. Finally, we demonstrate that the co-expression of AME and either P/CAF or GCN5 abrogates the repression of an AML1-dependent reporter gene.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Acetylation
  • Acetyltransferases / metabolism*
  • Alcohol Oxidoreductases
  • Animals
  • Binding Sites
  • Cell Cycle Proteins / metabolism*
  • Cell Line
  • Cell Nucleus / chemistry
  • Core Binding Factor Alpha 2 Subunit
  • DNA-Binding Proteins / metabolism
  • Gene Expression Regulation
  • Histone Acetyltransferases
  • Humans
  • Mice
  • Oncogene Proteins, Fusion / analysis
  • Oncogene Proteins, Fusion / chemistry
  • Oncogene Proteins, Fusion / metabolism*
  • Phosphoproteins / metabolism
  • Receptor, Macrophage Colony-Stimulating Factor / genetics
  • Repressor Proteins / analysis
  • Repressor Proteins / chemistry
  • Repressor Proteins / metabolism*
  • Trans-Activators / metabolism*
  • Transcription Factors
  • p300-CBP Transcription Factors


  • AML1-MDS1-EVI1 fusion protein, human
  • Cell Cycle Proteins
  • Core Binding Factor Alpha 2 Subunit
  • DNA-Binding Proteins
  • Oncogene Proteins, Fusion
  • Phosphoproteins
  • Repressor Proteins
  • Trans-Activators
  • Transcription Factors
  • Alcohol Oxidoreductases
  • C-terminal binding protein
  • Acetyltransferases
  • Gcn5l2 protein, mouse
  • Histone Acetyltransferases
  • KAT2A protein, human
  • p300-CBP Transcription Factors
  • p300-CBP-associated factor
  • Receptor, Macrophage Colony-Stimulating Factor