5ceh
From Proteopedia
Structure of histone lysine demethylase KDM5A in complex with selective inhibitor
Structural highlights
Function[KDM5A_HUMAN] Histone demethylase that specifically demethylates 'Lys-4' of histone H3, thereby playing a central role in histone code. Does not demethylate histone H3 'Lys-9', H3 'Lys-27', H3 'Lys-36', H3 'Lys-79' or H4 'Lys-20'. Demethylates trimethylated and dimethylated but not monomethylated H3 'Lys-4'. May stimulate transcription mediated by nuclear receptors. May be involved in transcriptional regulation of Hox proteins during cell differentiation. May participate in transcriptional repression of cytokines such as CXCL12. Plays a role in the regulation of the circadian rhythm and in maintaining the normal periodicity of the circadian clock. In a histone demethylase-independent manner, acts as a coactivator of the CLOCK-ARNTL/BMAL1-mediated transcriptional activation of PER1/2 and other clock-controlled genes and increases histone acetylation at PER1/2 promoters by inhibiting the activity of HDAC1 (By similarity).[UniProtKB:Q3UXZ9][1] [2] [3] [4] [5] Publication Abstract from PubMedThe KDM5 family of histone demethylases catalyzes the demethylation of histone H3 on lysine 4 (H3K4) and is required for the survival of drug-tolerant persister cancer cells (DTPs). Here we report the discovery and characterization of the specific KDM5 inhibitor CPI-455. The crystal structure of KDM5A revealed the mechanism of inhibition of CPI-455 as well as the topological arrangements of protein domains that influence substrate binding. CPI-455 mediated KDM5 inhibition, elevated global levels of H3K4 trimethylation (H3K4me3) and decreased the number of DTPs in multiple cancer cell line models treated with standard chemotherapy or targeted agents. These findings show that pretreatment of cancer cells with a KDM5-specific inhibitor results in the ablation of a subpopulation of cancer cells that can serve as the founders for therapeutic relapse. An inhibitor of KDM5 demethylases reduces survival of drug-tolerant cancer cells.,Vinogradova M, Gehling VS, Gustafson A, Arora S, Tindell CA, Wilson C, Williamson KE, Guler GD, Gangurde P, Manieri W, Busby J, Flynn EM, Lan F, Kim HJ, Odate S, Cochran AG, Liu Y, Wongchenko M, Yang Y, Cheung TK, Maile TM, Lau T, Costa M, Hegde GV, Jackson E, Pitti R, Arnott D, Bailey C, Bellon S, Cummings RT, Albrecht BK, Harmange JC, Kiefer JR, Trojer P, Classon M Nat Chem Biol. 2016 Jul;12(7):531-8. doi: 10.1038/nchembio.2085. Epub 2016 May, 23. PMID:27214401[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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