- PDB-2xql: Fitting of the H2A-H2B histones in the electron microscopy map of... -
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基本情報
登録情報
データベース: PDB / ID: 2xql
タイトル
Fitting of the H2A-H2B histones in the electron microscopy map of the complex Nucleoplasmin:H2A-H2B histones (1:5).
要素
HISTONE H2A-IV
HISTONE H2B 5
キーワード
NUCLEAR PROTEIN / CHAPERONE / CHROMATIN / NUCLEAR-CHAPERONE / HISTONE-CHAPERONE
機能・相同性
機能・相同性情報
Condensation of Prophase Chromosomes / Nonhomologous End-Joining (NHEJ) / G2/M DNA damage checkpoint / Processing of DNA double-strand break ends / Metalloprotease DUBs / Formation of the beta-catenin:TCF transactivating complex / PRC2 methylates histones and DNA / Oxidative Stress Induced Senescence / HDACs deacetylate histones / HATs acetylate histones ...Condensation of Prophase Chromosomes / Nonhomologous End-Joining (NHEJ) / G2/M DNA damage checkpoint / Processing of DNA double-strand break ends / Metalloprotease DUBs / Formation of the beta-catenin:TCF transactivating complex / PRC2 methylates histones and DNA / Oxidative Stress Induced Senescence / HDACs deacetylate histones / HATs acetylate histones / Transcriptional regulation by small RNAs / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / Assembly of the ORC complex at the origin of replication / RNA Polymerase I Promoter Opening / RNA Polymerase I Promoter Escape / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Estrogen-dependent gene expression / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / Regulation of endogenous retroelements by KRAB-ZFP proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / UCH proteinases / B-WICH complex positively regulates rRNA expression / Ub-specific processing proteases / Deposition of new CENPA-containing nucleosomes at the centromere / structural constituent of chromatin / nucleosome / heterochromatin formation / protein heterodimerization activity / DNA binding / nucleus 類似検索 - 分子機能
ジャーナル: J Biol Chem / 年: 2010 タイトル: Nucleoplasmin binds histone H2A-H2B dimers through its distal face. 著者: Isbaal Ramos / Jaime Martín-Benito / Ron Finn / Laura Bretaña / Kerman Aloria / Jesús M Arizmendi / Juan Ausió / Arturo Muga / José M Valpuesta / Adelina Prado / 要旨: Nucleoplasmin (NP) is a pentameric chaperone that regulates the condensation state of chromatin extracting specific basic proteins from sperm chromatin and depositing H2A-H2B histone dimers. It has ...Nucleoplasmin (NP) is a pentameric chaperone that regulates the condensation state of chromatin extracting specific basic proteins from sperm chromatin and depositing H2A-H2B histone dimers. It has been proposed that histones could bind to either the lateral or distal face of the pentameric structure. Here, we combine different biochemical and biophysical techniques to show that natural, hyperphosphorylated NP can bind five H2A-H2B dimers and that the amount of bound ligand depends on the overall charge (phosphorylation level) of the chaperone. Three-dimensional reconstruction of NP/H2A-H2B complex carried out by electron microscopy reveals that histones interact with the chaperone distal face. Limited proteolysis and mass spectrometry indicate that the interaction results in protection of the histone fold and most of the H2A and H2B C-terminal tails. This structural information can help to understand the function of NP as a histone chaperone.
履歴
登録
2010年9月2日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2010年11月3日
Provider: repository / タイプ: Initial release
改定 1.1
2013年3月20日
Group: Derived calculations / Other / Version format compliance
モード: BRIGHT FIELD / 倍率(公称値): 60000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 5.6 mm
試料ホルダ
温度: 293 K
撮影
フィルム・検出器のモデル: KODAK SO-163 FILM
画像スキャン
デジタル画像の数: 14
放射波長
相対比: 1
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解析
EMソフトウェア
ID
名称
カテゴリ
1
Situs
モデルフィッティング
2
EMAN
3次元再構成
3
SPIDER
3次元再構成
4
Xmipp
3次元再構成
CTF補正
詳細: EACH PLATE
対称性
点対称性: C5 (5回回転対称)
3次元再構成
手法: PROJECTION MATCHING / 解像度: 19.5 Å / 粒子像の数: 5557 / ピクセルサイズ(公称値): 2.3 Å 詳細: DOCKING OF FIVE DIMERS OF H2A-H2B HISTONES IN THE NUCLEOPLASMIN H2A-H2B COMPLEX (1 5-5). THE EXTENDED REGION OF THE H2A HISTONE WAS REMOVED. THE FINAL DOCKING INCLUDES THE FRAGMENTS FROM ...詳細: DOCKING OF FIVE DIMERS OF H2A-H2B HISTONES IN THE NUCLEOPLASMIN H2A-H2B COMPLEX (1 5-5). THE EXTENDED REGION OF THE H2A HISTONE WAS REMOVED. THE FINAL DOCKING INCLUDES THE FRAGMENTS FROM AMINOACID 15 TO 105 OF H2A HISTONE AND 36 TO 125 OF H2B HISTONE. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1777. (DEPOSITION ID: 7474). 対称性のタイプ: POINT
原子モデル構築
プロトコル: OTHER / 空間: REAL 詳細: METHOD--VOLUMETRIC CORRELATION REFINEMENT PROTOCOL--PROJECTION MATCHING