CELL INVASION / IPAD / T3SS / SEMET / INVASIN / VIRULENCE / SHIGELLA FLEXNERI / TYPE III SECRETION
機能・相同性
機能・相同性情報
effector-mediated activation of programmed cell death in host / extracellular region 類似検索 - 分子機能
IpaD-like / IpaD-like / Type III secretion systems tip complex components / BipD-like superfamily / Type III secretion systems tip complex components / Up-down Bundle / Mainly Alpha 類似検索 - ドメイン・相同性
ジャーナル: J Biol Chem / 年: 2007 タイトル: Self-chaperoning of the type III secretion system needle tip proteins IpaD and BipD. 著者: Steven Johnson / Pietro Roversi / Marianela Espina / Andrew Olive / Janet E Deane / Susan Birket / Terry Field / William D Picking / Ariel J Blocker / Edouard E Galyov / Wendy L Picking / Susan M Lea / 要旨: Bacteria expressing type III secretion systems (T3SS) have been responsible for the deaths of millions worldwide, acting as key virulence elements in diseases ranging from plague to typhoid fever. ...Bacteria expressing type III secretion systems (T3SS) have been responsible for the deaths of millions worldwide, acting as key virulence elements in diseases ranging from plague to typhoid fever. The T3SS is composed of a basal body, which traverses both bacterial membranes, and an external needle through which effector proteins are secreted. We report multiple crystal structures of two proteins that sit at the tip of the needle and are essential for virulence: IpaD from Shigella flexneri and BipD from Burkholderia pseudomallei. The structures reveal that the N-terminal domains of the molecules are intramolecular chaperones that prevent premature oligomerization, as well as sharing structural homology with proteins involved in eukaryotic actin rearrangement. Crystal packing has allowed us to construct a model for the tip complex that is supported by mutations designed using the structure.
履歴
登録
2006年11月24日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2006年11月30日
Provider: repository / タイプ: Initial release
改定 1.1
2015年4月1日
Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Non-polymer description / Other / Source and taxonomy / Structure summary
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: 0.9792 Å / 相対比: 1
反射
解像度: 3.1→33.9 Å / Num. obs: 62274 / % possible obs: 99.4 % / Observed criterion σ(I): 0 / 冗長度: 5.8 % / Biso Wilson estimate: 15.4 Å2 / Rmerge(I) obs: 0.1 / Net I/σ(I): 4.9
反射 シェル
解像度: 3.1→3.27 Å / 冗長度: 6 % / Rmerge(I) obs: 0.31 / Mean I/σ(I) obs: 2.3 / % possible all: 99.4
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解析
ソフトウェア
名称
バージョン
分類
SOLOMON
モデル構築
TNT
5.6.1
精密化
SCALA
データスケーリング
SHELXCD
位相決定
SHELXD
位相決定
SHARP
位相決定
SOLOMON
位相決定
RESOLVE
位相決定
ARP/wARP
位相決定
HELIXBUILD
位相決定
精密化
構造決定の手法: OTHER / 解像度: 3.1→34 Å / Isotropic thermal model: TNT BCORREL / 交差検証法: THROUGHOUT / σ(F): 0 / 立体化学のターゲット値: TNT PROTEGEO 詳細: REFINED IN BUSTER-TNT BETA 1.9.3 WAS USED AS A MOLECULAR REPLACEMENT MODEL FOR DETERMINING THE STRUCTURES OF PDB ENTRIES 2J0N, 2J0O