ジャーナル: Protein Sci / 年: 2016 タイトル: The MTA1 subunit of the nucleosome remodeling and deacetylase complex can recruit two copies of RBBP4/7. 著者: Jason W Schmidberger / Mehdi Sharifi Tabar / Mario Torrado / Ana P G Silva / Michael J Landsberg / Lou Brillault / Saad AlQarni / Yi Cheng Zeng / Benjamin L Parker / Jason K K Low / Joel P Mackay / 要旨: The nucleosome remodeling and deacetylase (NuRD) complex remodels the genome in the context of both gene transcription and DNA damage repair. It is essential for normal development and is distributed ...The nucleosome remodeling and deacetylase (NuRD) complex remodels the genome in the context of both gene transcription and DNA damage repair. It is essential for normal development and is distributed across multiple tissues in organisms ranging from mammals to nematode worms. In common with other chromatin-remodeling complexes, however, its molecular mechanism of action is not well understood and only limited structural information is available to show how the complex is assembled. As a step towards understanding the structure of the NuRD complex, we have characterized the interaction between two subunits: the metastasis associated protein MTA1 and the histone-binding protein RBBP4. We show that MTA1 can bind to two molecules of RBBP4 and present negative stain electron microscopy and chemical crosslinking data that allow us to build a low-resolution model of an MTA1-(RBBP4)2 subcomplex. These data build on our understanding of NuRD complex structure and move us closer towards an understanding of the biochemical basis for the activity of this complex.
全体 : Human MTA1 C-terminal truncation mutant (residues 449 to 715) bou...
全体
名称: Human MTA1 C-terminal truncation mutant (residues 449 to 715) bound to two copies of RBBP4.
要素
試料: Human MTA1 C-terminal truncation mutant (residues 449 to 715) bound to two copies of RBBP4.
タンパク質・ペプチド: Metastasis-associated protein MTA1 C-terminus (449-715)
タンパク質・ペプチド: Histone-binding protein RBBP4
-
超分子 #1000: Human MTA1 C-terminal truncation mutant (residues 449 to 715) bou...
超分子
名称: Human MTA1 C-terminal truncation mutant (residues 449 to 715) bound to two copies of RBBP4. タイプ: sample / ID: 1000 集合状態: One copy of MTA1-C binds to two copies of RBBP4. Number unique components: 2
分子量
実験値: 130 KDa / 理論値: 128 KDa / 手法: SDS PAGE
-
分子 #1: Metastasis-associated protein MTA1 C-terminus (449-715)
分子
名称: Metastasis-associated protein MTA1 C-terminus (449-715) タイプ: protein_or_peptide / ID: 1 / Name.synonym: MTA (449-715) / コピー数: 1 / 集合状態: 1 X MTA1, 2 X RBBP4 / 組換発現: Yes
由来(天然)
生物種: Homo sapiens (ヒト) / 別称: Human
分子量
実験値: 30 KDa / 理論値: 30 KDa
組換発現
生物種: Homo sapiens (ヒト) / 組換細胞: HEK293 / 組換プラスミド: pcDNA3.1
生物種: Homo sapiens (ヒト) / 組換細胞: HEK293 / 組換プラスミド: pcDNA3.1
配列
UniProtKB: Histone-binding protein RBBP4
-
実験情報
-
構造解析
手法
ネガティブ染色法
解析
単粒子再構成法
試料の集合状態
particle
-
試料調製
濃度
0.01 mg/mL
緩衝液
pH: 8.2 / 詳細: 50 mM HEPES KOH pH 8.2, 150 mM NaCl, 1 mM DTT.
染色
タイプ: NEGATIVE 詳細: After an incubation time of 5 min, the grid was blotted and washed with five drops of distilled water, blotted again and subsequently stained with a 2% (w/v) uranyl acetate solution for one ...詳細: After an incubation time of 5 min, the grid was blotted and washed with five drops of distilled water, blotted again and subsequently stained with a 2% (w/v) uranyl acetate solution for one minute. Excess stain was then blotted away and the grid allowed to dry under air at ambient conditions.
Particles were initially selected manually (1730 particles) then these were used to autopick 12114 particles using RELION. This was reduced to 9000 particles using manual inspection. Use of 2D class averaging reduced count to 4000 particles which were used to generate four 3D classes.
最終 再構成
想定した対称性 - 点群: C1 (非対称) / 解像度のタイプ: BY AUTHOR / 解像度: 29.7 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: RELION / 使用した粒子像数: 4000