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.
#1: ジャーナル: Acta Crystallogr.,Sect.F / 年: 2006 タイトル: Expression, Purification, Crystallization and Preliminary Crystallographic Analysis of Bipd, a Component of the Burkholderia Pseudomallei Type III Secretion System. 著者: Roversi, P. / Johnson, S. / Field, T. / Deane, J.E. / Galyov, E.E. / Lea, S.M.
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: 0.933 Å / 相対比: 1
反射
解像度: 2.7→54.31 Å / Num. obs: 114952 / % possible obs: 99.8 % / Observed criterion σ(I): 0 / 冗長度: 6.5 % / Biso Wilson estimate: 3.6 Å2 / Rmerge(I) obs: 0.09 / Net I/σ(I): 7.4
反射 シェル
解像度: 2.7→2.85 Å / 冗長度: 3.6 % / Rmerge(I) obs: 0.14 / Mean I/σ(I) obs: 2.4 / % possible all: 99.8
-
解析
ソフトウェア
名称
バージョン
分類
TNT
5.6.1
精密化
MOSFLM
データ削減
SCALA
データスケーリング
SHELXD
位相決定
SHARP
位相決定
SOLOMON
位相決定
精密化
構造決定の手法: 多重同系置換・異常分散 / 解像度: 2.7→54 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 PROTGEO 詳細: TNT RUN AGAINST MAXIMUM LIKELIHOOD IN BUSTER-TNT 1.9.3. BORIC ACID FROM BUFFER