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Potent inhibitors of NUDT5 silence hormone signaling in breast cancer
Structural highlights
FunctionNUDT5_HUMAN Hydrolyzes with similar activities ADP-ribose ADP-mannose, ADP-glucose, 8-oxo-GDP and 8-oxo-dGDP. Can also hydrolyze other nucleotide sugars with low activity.[1] Publication Abstract from PubMedWith a diverse network of substrates, NUDIX hydrolases have emerged as a key family of nucleotide-metabolizing enzymes. NUDT5 (also called NUDIX5) has been implicated in ADP-ribose and 8-oxo-guanine metabolism and was recently identified as a rheostat of hormone-dependent gene regulation and proliferation in breast cancer cells. Here, we further elucidate the physiological relevance of known NUDT5 substrates and underscore the biological requirement for NUDT5 in gene regulation and proliferation of breast cancer cells. We confirm the involvement of NUDT5 in ADP-ribose metabolism and dissociate a relationship to oxidized nucleotide sanitation. Furthermore, we identify potent NUDT5 inhibitors, which are optimized to promote maximal NUDT5 cellular target engagement by CETSA. Lead compound, TH5427, blocks progestin-dependent, PAR-derived nuclear ATP synthesis and subsequent chromatin remodeling, gene regulation and proliferation in breast cancer cells. We herein present TH5427 as a promising, targeted inhibitor that can be used to further study NUDT5 activity and ADP-ribose metabolism. Targeted NUDT5 inhibitors block hormone signaling in breast cancer cells.,Page BDG, Valerie NCK, Wright RHG, Wallner O, Isaksson R, Carter M, Rudd SG, Loseva O, Jemth AS, Almlof I, Font-Mateu J, Llona-Minguez S, Baranczewski P, Jeppsson F, Homan E, Almqvist H, Axelsson H, Regmi S, Gustavsson AL, Lundback T, Scobie M, Stromberg K, Stenmark P, Beato M, Helleday T Nat Commun. 2018 Jan 17;9(1):250. doi: 10.1038/s41467-017-02293-7. PMID:29343827[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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