Mammalian alteration/deficiency in activation 3 (Ada3) is essential for embryonic development and cell cycle progression

Shakur Mohibi, Channabasavaiah Basavaraju Gurumurthy, Alo Nag, Jun Wang, Sameer Mirza, Yousaf Mian, Meghan Quinn, Bryan Katafiasz, James Eudy, Sanjit Pandey, Chittibabu Guda, Mayumi Naramura, Hamid Band, Vimla Band

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Ada3 protein is an essential component of histone acetyl transferase containing coactivator complexes conserved from yeast to human. We show here that germline deletion of Ada3 in mouse is embryonic lethal, and adenovirus-Cre mediated conditional deletion of Ada3 in Ada3FL/FL mouse embryonic fibroblasts leads to a severe proliferation defect which was rescued by ectopic expression of human Ada3. A delay in G1 to S phase of cell cycle was also seen that was due to accumulation of Cdk inhibitor p27 which was an indirect effect of c-myc gene transcription control by Ada3. We further showed that this defect could be partially reverted by knocking down p27. Additionally, drastic changes in global histone acetylation and changes in global gene expression were observed in microarray analyses upon loss of Ada3. Lastly, formation of abnormal nuclei, mitotic defects and delay in G2/M to G1 transition was seen in Ada3 deleted cells. Taken together, we provide evidence for a critical role of Ada3 in embryogenesis and cell cycle progression as an essential component of HAT complex.

Original languageEnglish
Pages (from-to)29442-29456
Number of pages15
JournalJournal of Biological Chemistry
Issue number35
Publication statusPublished - Aug 24 2012
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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