5lsu
Structure of the Epigenetic Oncogene MMSET and inhibition by N-Alkyl Sinefungin Derivatives
Structural highlights
DiseaseNSD2_HUMAN Wolf-Hirschhorn syndrome. A chromosomal aberration involving WHSC1 is a cause of multiple myeloma tumors. Translocation t(4;14)(p16.3;q32.3) with IgH. WHSC1 is located in the Wolf-Hirschhorn syndrome (WHS) critical region. WHS results from by sub-telomeric deletions in the short arm of chromosome 4. WHSC1 is deleted in every case, however deletion of linked genes contributes to both the severity of the core characteristics and the presence of the additional syndromic problems. FunctionNSD2_HUMAN Histone methyltransferase with histone H3 'Lys-27' (H3K27me) methyltransferase activity. Isoform 2 may act as a transcription regulator that binds DNA and suppresses IL5 transcription through HDAC recruitment.[1] [2] [3] Publication Abstract from PubMedThe members of the NSD subfamily of lysine methyl transferases are compelling oncology targets due to the recent characterization of gain-of-function mutations and translocations in several hematological cancers. To date, these proteins have proven intractable to small molecule inhibition. Here, we present initial efforts to identify inhibitors of MMSET (aka NSD2 or WHSC1) using solution phase and crystal structural methods. On the basis of 2D NMR experiments comparing NSD1 and MMSET structural mobility, we designed an MMSET construct with five point mutations in the N-terminal helix of its SET domain for crystallization experiments and elucidated the structure of the mutant MMSET SET domain at 2.1 A resolution. Both NSD1 and MMSET crystal systems proved resistant to soaking or cocrystallography with inhibitors. However, use of the close homologue SETD2 as a structural surrogate supported the design and characterization of N-alkyl sinefungin derivatives, which showed low micromolar inhibition against both SETD2 and MMSET. Structure of the Epigenetic Oncogene MMSET and Inhibition by N-Alkyl Sinefungin Derivatives.,Tisi D, Chiarparin E, Tamanini E, Pathuri P, Coyle JE, Hold A, Holding FP, Amin N, Martin AC, Rich SJ, Berdini V, Yon J, Acklam P, Burke R, Drouin L, Harmer JE, Jeganathan F, van Montfort RL, Newbatt Y, Tortorici M, Westlake M, Wood A, Hoelder S, Heightman TD ACS Chem Biol. 2016 Sep 27. PMID:27571355[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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