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Small molecule inhibitors of histone acetyltransferase Tip60

Jiang Wu, Juxian Wang, Minyong Li, Yutao Yang, Binghe Wang, and Y George Zheng

Bioorg Chem 39(1):6 (2011) PMID 21186043

Tip60 is a key member of the MYST family of histone acetyltransferases and involved in a broad spectrum of cellular pathways and disease conditions. So far, small molecule inhibitors of Tip60 and other members of MYST HATs are rarely reported. To discover new small molecule inhibitors of Tip60 as mechanistic tools for functional study and as chemical leads for therapeutic development, we performed virtual screening using the crystal structure of Esa1 (the yeast homolog of Tip60) on a small molecule library database. Radioactive acetylation assays were carried out to further evaluate the virtual screen hits. Several compounds with new structural scaffolds were identified with micromolar inhibition potency for Tip60 from the biochemical studies. Further, computer modeling and kinetic assays suggest that these molecules target the acetyl-CoA binding site in Tip60. These new inhibitors provide valuable chemical hits to develop further potent inhibitors for the MYST HATs.

Copyright © 2011 Elsevier Ltd. All rights reserved.

DOI: 10.1016/j.bioorg.2010.11.003
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