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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: 2ca5 | ||||||
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タイトル | MxiH needle protein of Shigella Flexneri (monomeric form, residues 1- 78) | ||||||
![]() | MXIH | ||||||
![]() | TRANSPORT PROTEIN / MXIH / TYPE III SECRETION SYSTEM / NEEDLE COMPLEX / PROTEIN TRANSPORT / VIRULENCE | ||||||
機能・相同性 | ![]() type III protein secretion system complex / protein secretion by the type III secretion system / cell surface / extracellular region / identical protein binding 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Deane, J.E. / Roversi, P. / Cordes, F.S. / Johnson, S. / Kenjale, R. / Picking, W.L. / Picking, W.D. / Blocker, A.J. / Lea, S.M. | ||||||
![]() | ![]() タイトル: Molecular model of a type III secretion system needle: Implications for host-cell sensing. 著者: Janet E Deane / Pietro Roversi / Frank S Cordes / Steven Johnson / Roma Kenjale / Sarah Daniell / Frank Booy / William D Picking / Wendy L Picking / Ariel J Blocker / Susan M Lea / ![]() 要旨: Type III secretion systems are essential virulence determinants for many Gram-negative bacterial pathogens. The type III secretion system consists of cytoplasmic, transmembrane, and extracellular ...Type III secretion systems are essential virulence determinants for many Gram-negative bacterial pathogens. The type III secretion system consists of cytoplasmic, transmembrane, and extracellular domains. The extracellular domain is a hollow needle protruding above the bacterial surface and is held within a basal body that traverses both bacterial membranes. Effector proteins are translocated, via this external needle, directly into host cells, where they subvert normal cell functions to aid infection. Physical contact with host cells initiates secretion and leads to formation of a pore, thought to be contiguous with the needle channel, in the host-cell membrane. Here, we report the crystal structure of the Shigella flexneri needle subunit MxiH and a complete model for the needle assembly built into our three-dimensional EM reconstruction. The model, combined with mutagenesis data, reveals that signaling of host-cell contact is relayed through the needle via intersubunit contacts and suggests a mode of binding for a tip complex. #1: ジャーナル: Acta Crystallogr.,Sect.F / 年: 2006 タイトル: Expression, Purification, Crystallization and Preliminary Crystallographic Analysis of Mxih, a Subunit of the Shigella Flexneri Type III Secretion System Needle. 著者: Deane, J.E. / Cordes, F.S. / Roversi, P. / Johnson, S. / Kenjale, R. / Picking, W.D. / Picking, W.L. / Lea, S.M. / Blocker, A. | ||||||
履歴 |
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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 | ![]() | 38.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 26.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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1 | ![]()
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2 | ![]()
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単位格子 |
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非結晶学的対称性 (NCS) | NCS oper: (Code: given Matrix: (0.99021, 0.10552, 0.09133), ベクター: |
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要素
#1: タンパク質 | 分子量: 9545.514 Da / 分子数: 2 / 断片: TRUNCATED C-TERMINUS, RESIDUES 1-78 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 株: PWR100 / プラスミド: PET22B / 発現宿主: ![]() ![]() #2: 化合物 | #3: 化合物 | ChemComp-GOL / | #4: 化合物 | #5: 水 | ChemComp-HOH / | 配列の詳細 | THIS CONSTRUCT IS A 5-RESIDUES C-TERMINAL DELETION MUTANT. THE LEHHHHH SEQUENCE COMES FROM THE ...THIS CONSTRUCT IS A 5-RESIDUES C-TERMINAL DELETION MUTANT. THE LEHHHHH SEQUENCE COMES FROM THE EXPRESSION | |
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-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 | マシュー密度: 1.9 Å3/Da / 溶媒含有率: 0.34 % 解説: STRUCTURE DETERMINED BY MIRAS WITH URANYL ACETATE AND SEMET DERIVATIVES |
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結晶化 | pH: 5.6 詳細: 20% PEG 4000, 0.1 M SODIUM CITRATE PH 5.6, 20% ISOPROPANOL, 10% GLYCEROL |
-データ収集
回折 | 平均測定温度: 100 K |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: ADSC CCD / 検出器: CCD / 日付: 2004年7月31日 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 0.9794 Å / 相対比: 1 |
反射 | 解像度: 2.1→28 Å / Num. obs: 8232 / % possible obs: 99.9 % / Observed criterion σ(I): 0 / 冗長度: 4.3 % / Biso Wilson estimate: 1.6 Å2 / Rmerge(I) obs: 0.07 / Net I/σ(I): 7.7 |
反射 シェル | 解像度: 2.1→2.21 Å / 冗長度: 4.3 % / Rmerge(I) obs: 0.25 / Mean I/σ(I) obs: 2.9 / % possible all: 99.9 |
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]() 詳細: REFINEMENT WAS DONE WITH MAXIMUM LIKELIHOOD IN BUSTER-TNT VERSION 1.3.0 THE REGIONS A1-A19, B1- B14 AND B76-B81 WERE DISORDERED IN THE CRYSTAL AND WERE NOT MODELLED
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溶媒の処理 | 溶媒モデル: BABINET SCALING / Bsol: 25 Å2 / ksol: 0.418 e/Å3 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 2.1→28 Å
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拘束条件 |
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