Step-brothers in arms, SAGA and ATAC co-activator complexes, use different strategies
Francesca Rizzo1,2,3,4, Adam Ben-Shem1,2,3,4, H T Marc Timmers5,6
1Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.
The EMBO Journal
|August 11, 2026
Summary
The SAGA and ATAC complexes regulate gene transcription through distinct mechanisms. Understanding their unique functions is key to developing targeted cancer therapies.
Area of Science:
- Molecular Biology
- Epigenetics
- Cancer Research
Background:
- SAGA (Spt-Ada-Gcn5 acetyltransferase) and ATAC (Ada Two-A Containing) are related histone acetyltransferase complexes involved in gene transcription.
- These complexes share subunits but also possess unique components, leading to distinct enzymatic activities and regulatory roles.
Purpose of the Study:
- To review the differential interactions and chromatin-reading capabilities of SAGA and ATAC.
- To highlight the distinct roles of SAGA and ATAC in cellular homeostasis and oncogenic transformation.
- To explore the potential of targeting SAGA and ATAC in cancer therapy.
Main Methods:
- Literature review of emerging evidence on SAGA and ATAC complex functions.
- Analysis of differential interactions between transcriptional activators and these complexes.
- Examination of their roles in gene regulation and cancer progression.
Main Results:
- SAGA and ATAC exhibit differential interactions with transcriptional activators and distinct chromatin-recognition abilities.
- Dysregulation of SAGA and ATAC contributes to cancer progression.
- Small-molecule inhibitors targeting SAGA/ATAC components show promise for cancer treatment.
Conclusions:
- SAGA and ATAC have unique and overlapping functions crucial for transcriptional control.
- Targeting these complexes offers potential strategies for precision oncology.
- Further understanding of SAGA and ATAC is vital for developing novel cancer therapies.
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