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基本情報
登録情報 | ![]() | |||||||||||||||
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タイトル | 50S subunit precursor C-CP_L2-L28 | |||||||||||||||
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![]() | ribosome / antimicrobial peptide / RNA / ribosomal protein / PrAMP / proline-rich peptide / antibiotics / 50S / Api137 | |||||||||||||||
機能・相同性 | ![]() transcriptional attenuation / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome ...transcriptional attenuation / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / ribosome assembly / cytosolic ribosome assembly / response to reactive oxygen species / regulation of cell growth / DNA-templated transcription termination / response to radiation / mRNA 5'-UTR binding / large ribosomal subunit / transferase activity / ribosome binding / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() ![]() | |||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.55 Å | |||||||||||||||
![]() | Lauer S / Nikolay R / Spahn CMT | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: The proline-rich antimicrobial peptide Api137 disrupts large ribosomal subunit assembly and induces misfolding. 著者: Simon Malte Lauer / Jakob Gasse / Andor Krizsan / Maren Reepmeyer / Thiemo Sprink / Rainer Nikolay / Christian M T Spahn / Ralf Hoffmann / ![]() 要旨: The proline-rich antimicrobial designer peptide Api137 inhibits protein expression in bacteria by binding simultaneously to the ribosomal polypeptide exit tunnel and the release factor (RF), ...The proline-rich antimicrobial designer peptide Api137 inhibits protein expression in bacteria by binding simultaneously to the ribosomal polypeptide exit tunnel and the release factor (RF), depleting the cellular RF pool and leading to ribosomal arrest at stop codons. This study investigates the additional effect of Api137 on the assembly of ribosomes using an Escherichia coli reporter strain expressing one ribosomal protein per 30S and 50S subunit tagged with mCherry and EGFP, respectively. Separation of cellular extracts derived from cells exposed to Api137 in a sucrose gradient reveals elevated levels of partially assembled and not fully matured precursors of the 50S subunit (pre-50S). High-resolution structures obtained by cryogenic electron microscopy demonstrate that a large proportion of pre-50S states are missing up to five proteins (uL22, bL32, uL29, bL23, and uL16) and have misfolded helices in 23S rRNA domain IV. These data suggest a second mechanism for Api137, wherein it disrupts 50S subunit assembly by inducing the formation of misfolded precursor particles potentially incapable of evolving into active ribosomes, suggesting a bactericidal mechanism. | |||||||||||||||
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構造の表示
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マップデータ | ![]() | 51.9 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 39.9 KB 39.9 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 9.8 KB | 表示 | ![]() |
画像 | ![]() | 147.7 KB | ||
マスクデータ | ![]() | 103 MB | ![]() | |
Filedesc metadata | ![]() | 9.5 KB | ||
その他 | ![]() ![]() | 95.5 MB 95.5 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 9h3vMC ![]() 9h3kC ![]() 9h3lC ![]() 9h3mC ![]() 9h3nC ![]() 9h3oC ![]() 9h3pC ![]() 9h3qC ![]() 9h3rC ![]() 9h3sC ![]() 9h3tC ![]() 9h3uC ![]() 9h3wC ![]() 9h3xC ![]() 9h3yC ![]() 9h3zC ![]() 9ha1C ![]() 9ha2C ![]() 9ha3C ![]() 9ha4C ![]() 9ha5C ![]() 9ha6C ![]() 9ha7C ![]() 9haiC ![]() 9halC ![]() 9hamC M: このマップから作成された原子モデル C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.41333 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-マスク #1
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #2
ファイル | emd_51839_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_51839_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
+全体 : pre50S precursor derived from Api137-treated cells
+超分子 #1: pre50S precursor derived from Api137-treated cells
+分子 #1: Large ribosomal subunit protein bL32
+分子 #2: Large ribosomal subunit protein bL34
+分子 #5: Large ribosomal subunit protein uL2
+分子 #6: 50S ribosomal protein L3
+分子 #7: Large ribosomal subunit protein uL4
+分子 #8: Large ribosomal subunit protein uL5
+分子 #9: Large ribosomal subunit protein bL9
+分子 #10: Large ribosomal subunit protein uL13
+分子 #11: Large ribosomal subunit protein uL14
+分子 #12: Large ribosomal subunit protein uL15
+分子 #13: Large ribosomal subunit protein bL17
+分子 #14: Large ribosomal subunit protein uL18
+分子 #15: Large ribosomal subunit protein bL19
+分子 #16: Large ribosomal subunit protein bL20
+分子 #17: Large ribosomal subunit protein bL21
+分子 #18: Large ribosomal subunit protein uL22
+分子 #19: Large ribosomal subunit protein uL23
+分子 #20: Large ribosomal subunit protein uL24
+分子 #21: Large ribosomal subunit protein bL25
+分子 #22: Large ribosomal subunit protein bL27
+分子 #23: Large ribosomal subunit protein bL28
+分子 #24: Large ribosomal subunit protein uL29
+分子 #25: Large ribosomal subunit protein uL30
+分子 #3: 23S ribosomal RNA
+分子 #4: 5S ribosomal RNA
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.6 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | TFS KRIOS |
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特殊光学系 | エネルギーフィルター - 名称: GIF Bioquantum |
撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 実像数: 2704 / 平均露光時間: 1.17 sec. / 平均電子線量: 45.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | C2レンズ絞り径: 100.0 µm / 照射モード: OTHER / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 最大 デフォーカス(公称値): 2.0 µm / 最小 デフォーカス(公称値): 0.8 µm / 倍率(公称値): 81000 |
試料ステージ | ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |