+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 4v61 | |||||||||
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タイトル | Homology model for the Spinach chloroplast 30S subunit fitted to 9.4A cryo-EM map of the 70S chlororibosome. | |||||||||
要素 |
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キーワード | RIBOSOME / SMALL RIBOSOMAL SUBUNIT / SPINACH CHLOROPLAST RIBOSOME / RIBONUCLEOPROTEIN PARTICLE / MACROMOLECULAR COMPLEX | |||||||||
機能・相同性 | 機能・相同性情報 plastid small ribosomal subunit / mitochondrial large ribosomal subunit / mitochondrial small ribosomal subunit / mitochondrial translation / chloroplast / DNA-templated transcription termination / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / large ribosomal subunit / ribosomal small subunit assembly ...plastid small ribosomal subunit / mitochondrial large ribosomal subunit / mitochondrial small ribosomal subunit / mitochondrial translation / chloroplast / DNA-templated transcription termination / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / large ribosomal subunit / ribosomal small subunit assembly / small ribosomal subunit / large ribosomal subunit rRNA binding / transferase activity / cytosolic small ribosomal subunit / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / response to antibiotic / mRNA binding / mitochondrion / RNA binding 類似検索 - 分子機能 | |||||||||
生物種 | Spinacea oleracea (ホウレンソウ) | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 9.4 Å | |||||||||
データ登録者 | Sharma, M.R. / Wilson, D.N. / Datta, P.P. / Barat, C. / Schluenzen, F. / Fucini, P. / Agrawal, R.K. | |||||||||
引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2007 タイトル: Cryo-EM study of the spinach chloroplast ribosome reveals the structural and functional roles of plastid-specific ribosomal proteins. 著者: Manjuli R Sharma / Daniel N Wilson / Partha P Datta / Chandana Barat / Frank Schluenzen / Paola Fucini / Rajendra K Agrawal / 要旨: Protein synthesis in the chloroplast is carried out by chloroplast ribosomes (chloro-ribosome) and regulated in a light-dependent manner. Chloroplast or plastid ribosomal proteins (PRPs) generally ...Protein synthesis in the chloroplast is carried out by chloroplast ribosomes (chloro-ribosome) and regulated in a light-dependent manner. Chloroplast or plastid ribosomal proteins (PRPs) generally are larger than their bacterial counterparts, and chloro-ribosomes contain additional plastid-specific ribosomal proteins (PSRPs); however, it is unclear to what extent these proteins play structural or regulatory roles during translation. We have obtained a three-dimensional cryo-EM map of the spinach 70S chloro-ribosome, revealing the overall structural organization to be similar to bacterial ribosomes. Fitting of the conserved portions of the x-ray crystallographic structure of the bacterial 70S ribosome into our cryo-EM map of the chloro-ribosome reveals the positions of PRP extensions and the locations of the PSRPs. Surprisingly, PSRP1 binds in the decoding region of the small (30S) ribosomal subunit, in a manner that would preclude the binding of messenger and transfer RNAs to the ribosome, suggesting that PSRP1 is a translation factor rather than a ribosomal protein. PSRP2 and PSRP3 appear to structurally compensate for missing segments of the 16S rRNA within the 30S subunit, whereas PSRP4 occupies a position buried within the head of the 30S subunit. One of the two PSRPs in the large (50S) ribosomal subunit lies near the tRNA exit site. Furthermore, we find a mass of density corresponding to chloro-ribosome recycling factor; domain II of this factor appears to interact with the flexible C-terminal domain of PSRP1. Our study provides evolutionary insights into the structural and functional roles that the PSRPs play during protein synthesis in chloroplasts. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 4v61.cif.gz | 3.1 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb4v61.ent.gz | 表示 | PDB形式 | |
PDBx/mmJSON形式 | 4v61.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 4v61_validation.pdf.gz | 1.5 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 4v61_full_validation.pdf.gz | 2 MB | 表示 | |
XML形式データ | 4v61_validation.xml.gz | 283 KB | 表示 | |
CIF形式データ | 4v61_validation.cif.gz | 439.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/v6/4v61 ftp://data.pdbj.org/pub/pdb/validation_reports/v6/4v61 | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
-RNA鎖 , 4種, 4分子 AABABBBC
#1: RNA鎖 | 分子量: 483490.531 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: modeled using Escherichia coli 2AVY as template / 由来: (天然) Spinacea oleracea (ホウレンソウ) / 細胞内の位置: chloroplast / 参照: GenBank: 7636084 |
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#22: RNA鎖 | 分子量: 911368.312 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: modeled using Escherichia coli 2AWB as template / 由来: (天然) Spinacea oleracea (ホウレンソウ) / 参照: EMBL: SOL400848 |
#23: RNA鎖 | 分子量: 37743.441 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: modeled using Escherichia coli 2AWB as template / 由来: (天然) Spinacea oleracea (ホウレンソウ) / 参照: EMBL: SOL400848 |
#24: RNA鎖 | 分子量: 33330.867 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: modeled using Escherichia coli 2AWB as template / 由来: (天然) Spinacea oleracea (ホウレンソウ) / 参照: EMBL: SOL400848 |
+Ribosomal Protein ... , 49種, 49分子 ABACADAEAFAGAHAIAJAKALAMANAOAPAQARASATAUBDBEBFBGBHBIBJBKBLBM...
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: spinach 70S chloro-ribosome / タイプ: RIBOSOME / 詳細: tight couple chloroplast 70S ribosomes |
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緩衝液 | 名称: 10mM Tris-HCL pH 7.6, 50mM KCL, 10mM MgOAc, 7mM 2-ME pH: 7.6 詳細: 10mM Tris-HCL pH 7.6, 50mM KCL, 10mM MgOAc, 7mM 2-ME |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE 詳細: 5 microliters applied to the grid then blotted for 3 seconds with Whatman number 1 filter paper before plunging in liquid ethane. |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai F20 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F20 |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 50000 X / 倍率(補正後): 50760 X / 最大 デフォーカス(公称値): 3500 nm / 最小 デフォーカス(公称値): 700 nm / Cs: 2 mm |
試料ホルダ | 温度: 93 K / 傾斜角・最大: 0 ° / 傾斜角・最小: 0 ° |
撮影 | 電子線照射量: 20 e/Å2 / フィルム・検出器のモデル: KODAK SO-163 FILM |
-解析
CTF補正 | 詳細: CTF correction for each Micrograph | ||||||||||||
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対称性 | 点対称性: C1 (非対称) | ||||||||||||
3次元再構成 | 手法: The projection matching procedure within the SPIDER software was used to get 3D map 解像度: 9.4 Å / 粒子像の数: 86370 / ピクセルサイズ(実測値): 2.76 Å / 倍率補正: 50,760 詳細: An 11.5 A E.coli 70S ribosome map was used as initial reference and then resulting 18 A map from reconstruction of 70S chloro-ribosome was used as a reference for iterative refinement 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / Target criteria: Best visual fit using the program O 詳細: METHOD--Cross-Correlation based manual fitting in O REFINEMENT PROTOCOL--Rigid Body | ||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / 詳細: 2XYZ AND 2ZXY FOR SMALL AND LARGE SUBUNIT RESPECTIVELY / Source name: PDB / タイプ: experimental model
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精密化ステップ | サイクル: LAST
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