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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9jyy | |||||||||||||||||||||
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タイトル | core proteins of mature T7 | |||||||||||||||||||||
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![]() | VIRAL PROTEIN / Complex | |||||||||||||||||||||
機能・相同性 | ![]() symbiont genome ejection through host cell envelope / : / symbiont entry into host cell via disruption of host cell wall peptidoglycan / peptidoglycan lytic transglycosylase activity / symbiont genome ejection through host cell envelope, short tail mechanism / peptidoglycan metabolic process / symbiont entry into host / T=7 icosahedral viral capsid / symbiont entry into host cell via disruption of host cell envelope / virion component ...symbiont genome ejection through host cell envelope / : / symbiont entry into host cell via disruption of host cell wall peptidoglycan / peptidoglycan lytic transglycosylase activity / symbiont genome ejection through host cell envelope, short tail mechanism / peptidoglycan metabolic process / symbiont entry into host / T=7 icosahedral viral capsid / symbiont entry into host cell via disruption of host cell envelope / virion component / killing of cells of another organism / hydrolase activity / defense response to bacterium / host cell plasma membrane / membrane 類似検索 - 分子機能 | |||||||||||||||||||||
生物種 | ![]() ![]() | |||||||||||||||||||||
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: 3 Å | |||||||||||||||||||||
![]() | Liu, H.R. / Chen, W.Y. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Conformational changes in and translocation of small proteins: insights into the ejection mechanism of podophages. 著者: Jing Zheng / Hao Xiao / Hao Pang / Li Wang / Jingdong Song / Wenyuan Chen / Lingpeng Cheng / Hongrong Liu / ![]() 要旨: Podophage tails are too short to span the cell envelope during infection. Consequently, podophages initially eject the core proteins within the head for the formation of an elongated trans-envelope ...Podophage tails are too short to span the cell envelope during infection. Consequently, podophages initially eject the core proteins within the head for the formation of an elongated trans-envelope channel for DNA ejection. Although the core proteins of bacteriophage T7 have been resolved at near-atomic resolution, the mechanisms of core proteins and DNA ejection remain to be fully elucidated. In this study, we provided improved structures of core proteins in mature T7 and the portal-tail complex in lipopolysaccharide-induced DNA-ejected T7 to resolutions of approximately 3 Å. Using these structures, we identified three small proteins, namely gp14, gp6.7, and gp7.3, and illustrated the conformational changes in and translocation of these proteins from the mature to DNA-ejected states. Our structures indicate that gp6.7, which participates in the assembly of the core and trans-envelope channel, is a core protein, and that gp7.3 serves as a structural scaffold to assist the assembly of the nozzle into the adaptor. IMPORTANCE: Podophage T7 core proteins form an elongated trans-envelope channel for genomic DNA delivery into the host cell. The structures of the core proteins within the mature T7 and assembled in ...IMPORTANCE: Podophage T7 core proteins form an elongated trans-envelope channel for genomic DNA delivery into the host cell. The structures of the core proteins within the mature T7 and assembled in the periplasmic tunnel form in the DNA-ejected T7 have been resolved previously. Here, we resolved the structures of two new structural proteins (gp6.7 and gp7.3) within mature T7 and receptor-induced DNA-ejected T7. The gp6.7 protein participates in the assembly of the core complex within mature T7 and the trans-envelope channel during T7 infection; therefore, gp6.7 is a core protein. Before T7 infection, gp7.3 plays a role in promoting the assembly of the nozzle into the adaptor. | |||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 1.8 MB | 表示 | ![]() |
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PDB形式 | ![]() | 1.5 MB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 589 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 793.8 KB | 表示 | |
XML形式データ | ![]() | 219.6 KB | 表示 | |
CIF形式データ | ![]() | 333.7 KB | 表示 | |
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 | ![]() 61909MC ![]() 9jyzC ![]() 9jz0C M: このデータのモデリングに利用したマップデータ 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
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 9354.512 Da / 分子数: 8 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #2: タンパク質 | 分子量: 20990.842 Da / 分子数: 8 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | 分子量: 84454.008 Da / 分子数: 8 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #4: タンパク質 | 分子量: 144028.219 Da / 分子数: 4 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() 参照: UniProt: P03726, 付加脱離酵素(リアーゼ); 炭素-酸素リアーゼ類; 多糖に作用する Has protein modification | N | |
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-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 |
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試料調製
構成要素 | 名称: Escherichia phage T7 / タイプ: VIRUS / Entity ID: all / 由来: NATURAL |
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由来(天然) | 生物種: ![]() ![]() |
ウイルスについての詳細 | 中空か: NO / エンベロープを持つか: NO / 単離: SPECIES / タイプ: VIRION |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 4000 nm / 最小 デフォーカス(公称値): 500 nm |
撮影 | 電子線照射量: 35 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 45731 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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