2RHX

Crystal structure of the 3-MBT repeats from human L3MBTL1 bound to dimethyl-lysine

2RHX の概要

• エントリーDOI: 10.2210/pdb2rhx/pdb
• 関連するPDBエントリー: 2RHI 2RHU 2RHY 2RHZ 2RI2 2RI3 2RI5
• 分子名称: Lethal(3)malignant brain tumor-like protein, SULFATE ION, N-DIMETHYL-LYSINE, ... (6 entities in total)
• 機能のキーワード: beta barrel, dimethyl-lysine, alternative splicing, chromatin regulator, dna-binding, metal-binding, nucleus, repressor, transcription, transcription regulation, zinc, zinc-finger
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Nucleus: Q9Y468
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 39906.49

構造登録者

Li, H.,Patel, D.J. (登録日: 2007-10-09, 公開日: 2007-12-11, 最終更新日: 2023-08-30)

主引用文献

Li, H.,Fischle, W.,Wang, W.,Duncan, E.M.,Liang, L.,Murakami-Ishibe, S.,Allis, C.D.,Patel, D.J.
Structural Basis for Lower Lysine Methylation State-Specific Readout by MBT Repeats of L3MBTL1 and an Engineered PHD Finger.
Mol.Cell, 28:677-691, 2007

PubMed Abstract: Human L3MBTL1, which contains three malignant brain tumor (MBT) repeats, binds monomethylated and dimethylated lysines, but not trimethylated lysines, in several histone sequence contexts. In crystal structures of L3MBTL1 complexes, the monomethyl- and dimethyllysines insert into a narrow and deep cavity of aromatic residue-lined pocket 2, while a proline ring inserts into shallower pocket 1. We have also engineered a single Y to E substitution within the aromatic cage of the BPTF PHD finger, resulting in a reversal of binding preference from trimethyl- to dimethyllysine in an H3K4 sequence context. In both the "cavity insertion" (L3MBTL1) and "surface groove" (PHD finger) modes of methyllysine recognition, a carboxylate group both hydrogen bonds and ion pairs to the methylammonium proton. Our structural and binding studies of these two modules provide insights into the molecular principles governing the decoding of lysine methylation states, thereby highlighting a methylation state-specific layer of histone mark readout impacting on epigenetic regulation.

PubMed: 18042461
DOI: 10.1016/j.molcel.2007.10.023

実験手法

X-RAY DIFFRACTION (2.1 Å)