4X3S

Crystal structure of chromobox homology 7 (CBX7) with SETDB1-1170me3 Peptide

4X3S の概要

• エントリーDOI: 10.2210/pdb4x3s/pdb
• 関連するPDBエントリー: 4X3T 4X3U
• 分子名称: Chromobox protein homolog 7, SETDB1-1170me3 Peptide, FE (III) ION, ... (5 entities in total)
• 機能のキーワード: cbx7, chromodomain, transcription
• 由来する生物種: Mus musculus (Mouse); 詳細
• 細胞内の位置: Nucleus : Q8VDS3
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 18578.56

構造登録者

Ren, C.,Plotnikov, A.N.,Zhou, M.M. (登録日: 2014-12-01, 公開日: 2015-03-04, 最終更新日: 2023-09-27)

主引用文献

Ren, C.,Morohashi, K.,Plotnikov, A.N.,Jakoncic, J.,Smith, S.G.,Li, J.,Zeng, L.,Rodriguez, Y.,Stojanoff, V.,Walsh, M.,Zhou, M.M.
Small-Molecule Modulators of Methyl-Lysine Binding for the CBX7 Chromodomain.
Chem.Biol., 22:161-168, 2015

PubMed Abstract: Chromobox homolog 7 (CBX7) plays an important role in gene transcription in a wide array of cellular processes, ranging from stem cell self-renewal and differentiation to tumor progression. CBX7 functions through its N-terminal chromodomain (ChD), which recognizes trimethylated lysine 27 of histone 3 (H3K27me3), a conserved epigenetic mark that signifies gene transcriptional repression. In this study, we report the discovery of small molecules that inhibit CBX7ChD binding to H3K27me3. Our crystal structures reveal the binding modes of these molecules that compete against H3K27me3 binding through interactions with key residues in the methyl-lysine binding pocket of CBX7ChD. We further show that a lead compound, MS37452, derepresses transcription of Polycomb repressive complex target gene p16/CDKN2A by displacing CBX7 binding to the INK4A/ARF locus in prostate cancer cells. These small molecules have the potential to be developed into high-potency chemical modulators that target CBX7 functions in gene transcription in different disease pathways.

PubMed: 25660273
DOI: 10.1016/j.chembiol.2014.11.021

実験手法

X-RAY DIFFRACTION (1.6 Å)