4A69

Structure of HDAC3 bound to corepressor and inositol tetraphosphate

4A69 の概要

• エントリーDOI: 10.2210/pdb4a69/pdb
• 関連するPDBエントリー: 1KKQ 1R2B 1XC5
• 分子名称: HISTONE DEACETYLASE 3,, NUCLEAR RECEPTOR COREPRESSOR 2, ZINC ION, ... (8 entities in total)
• 機能のキーワード: transcription, hydrolase
• 由来する生物種: HOMO SAPIENS (HUMAN); 詳細
• 細胞内の位置: Nucleus: O15379 Q9Y618
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 110225.27

構造登録者

Watson, P.J.,Fairall, L.,Santos, G.M.,Schwabe, J.W.R. (登録日: 2011-11-01, 公開日: 2012-01-11, 最終更新日: 2023-12-20)

主引用文献

Watson, P.J.,Fairall, L.,Santos, G.M.,Schwabe, J.W.R.
Structure of Hdac3 Bound to Co-Repressor and Inositol Tetraphosphate.
Nature, 481:335-, 2012

PubMed Abstract: Histone deacetylase enzymes (HDACs) are emerging cancer drug targets. They regulate gene expression by removing acetyl groups from lysine residues in histone tails, resulting in chromatin condensation. The enzymatic activity of most class I HDACs requires recruitment into multi-subunit co-repressor complexes, which are in turn recruited to chromatin by repressive transcription factors. Here we report the structure of a complex between an HDAC and a co-repressor, namely, human HDAC3 with the deacetylase activation domain (DAD) from the human SMRT co-repressor (also known as NCOR2). The structure reveals two remarkable features. First, the SMRT-DAD undergoes a large structural rearrangement on forming the complex. Second, there is an essential inositol tetraphosphate molecule--D-myo-inositol-(1,4,5,6)-tetrakisphosphate (Ins(1,4,5,6)P(4))--acting as an 'intermolecular glue' between the two proteins. Assembly of the complex is clearly dependent on the Ins(1,4,5,6)P(4), which may act as a regulator--potentially explaining why inositol phosphates and their kinases have been found to act as transcriptional regulators. This mechanism for the activation of HDAC3 appears to be conserved in class I HDACs from yeast to humans, and opens the way to novel therapeutic opportunities.

PubMed: 22230954
DOI: 10.1038/NATURE10728

実験手法

X-RAY DIFFRACTION (2.06 Å)