ジャーナル: Nat Commun / 年: 2016 タイトル: The architecture of the Schizosaccharomyces pombe CCR4-NOT complex. 著者: Marta Ukleja / Jorge Cuellar / Aleksandra Siwaszek / Joanna M Kasprzak / Mariusz Czarnocki-Cieciura / Janusz M Bujnicki / Andrzej Dziembowski / Jose M Valpuesta / 要旨: CCR4-NOT is a large protein complex present both in cytoplasm and the nucleus of eukaryotic cells. Although it is involved in a variety of distinct processes related to expression of genetic ...CCR4-NOT is a large protein complex present both in cytoplasm and the nucleus of eukaryotic cells. Although it is involved in a variety of distinct processes related to expression of genetic information such as poly(A) tail shortening, transcription regulation, nuclear export and protein degradation, there is only fragmentary information available on some of its nine subunits. Here we show a comprehensive structural characterization of the native CCR4-NOT complex from Schizosaccharomyces pombe. Our cryo-EM 3D reconstruction of the complex, combined with techniques such as immunomicroscopy, RNA-nanogold labelling, docking of the available high-resolution structures and models of different subunits and domains, allow us to propose its full molecular architecture. We locate all functionally defined domains endowed with deadenylating and ubiquitinating activities, the nucleus-specific RNA-interacting subunit Mmi1, as well as surfaces responsible for protein-protein interactions. This information provides insight into cooperation of the different CCR4-NOT complex functions.
ダウンロード / ファイル: emd_3232.map.gz / 形式: CCP4 / 大きさ: 1.3 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Cryo-EM reconstruction of the CCR4-NOT complex
ボクセルのサイズ
X=Y=Z: 4.2 Å
密度
表面レベル
登録者による: 0.348 / ムービー #1: 0.348
最小 - 最大
-0.00219599 - 10.73409462
平均 (標準偏差)
0.09819236 (±0.67935294)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
0
0
0
サイズ
70
70
70
Spacing
70
70
70
セル
A=B=C: 294.0 Å α=β=γ: 89.999 °
CCP4マップ ヘッダ情報:
mode
Image stored as Reals
Å/pix. X/Y/Z
4.2
4.2
4.2
M x/y/z
70
70
70
origin x/y/z
0.000
0.000
0.000
length x/y/z
294.000
294.000
294.000
α/β/γ
89.999
89.999
89.999
start NX/NY/NZ
-147
-147
-146
NX/NY/NZ
294
294
294
MAP C/R/S
1
2
3
start NC/NR/NS
0
0
0
NC/NR/NS
70
70
70
D min/max/mean
-0.002
10.734
0.098
-
添付データ
-
試料の構成要素
-
全体 : S. pombe CCR4-NOT complex
全体
名称: S. pombe CCR4-NOT complex
要素
試料: S. pombe CCR4-NOT complex
タンパク質・ペプチド: CCR4-NOT complex
-
超分子 #1000: S. pombe CCR4-NOT complex
超分子
名称: S. pombe CCR4-NOT complex / タイプ: sample / ID: 1000 / Number unique components: 1
分子量
理論値: 700 MDa
-
分子 #1: CCR4-NOT complex
分子
名称: CCR4-NOT complex / タイプ: protein_or_peptide / ID: 1 詳細: CCR4-NOT complex purified from the endogenous expression of S. pombe cells. The complex is composed of Not1, Not2, Not3, Not4, Caf1, Caf40, Ccr4, Mmi1 subunits コピー数: 1 / 組換発現: No
pH: 7.4 / 詳細: 10 mM HEPES, 500 mM NaCl, ~3% glycerol
グリッド
詳細: Quantifoil R 1.2/ R1.3 300 mesh grids; ref. Q09684
凍結
凍結剤: ETHANE / チャンバー内湿度: 80 % / 装置: LEICA EM CPC 手法: Aliquots (5 ul) of purified concentrated CCR4-NOT were incubated (2-5 min) with the grid, blotted and plunged into a liquid ethane chamber.