- PDB-6uji: Low resolution crystal structure (5.5 A) of the anthrax toxin pro... -
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基本情報
登録情報
データベース: PDB / ID: 6uji
タイトル
Low resolution crystal structure (5.5 A) of the anthrax toxin protective antigen heptamer prepore D425A mutant
要素
Protective antigen PA-63
キーワード
TOXIN / Anthrax Toxin / PA63 heptamer
機能・相同性
機能・相同性情報
positive regulation of apoptotic process in another organism / host cell cytosol / Uptake and function of anthrax toxins / negative regulation of MAPK cascade / host cell endosome membrane / protein homooligomerization / toxin activity / host cell plasma membrane / extracellular region / identical protein binding ...positive regulation of apoptotic process in another organism / host cell cytosol / Uptake and function of anthrax toxins / negative regulation of MAPK cascade / host cell endosome membrane / protein homooligomerization / toxin activity / host cell plasma membrane / extracellular region / identical protein binding / membrane / metal ion binding 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
P30 GM110761
米国
引用
ジャーナル: J Mol Biol / 年: 2022 タイトル: Structure of the Anthrax Protective Antigen D425A Dominant Negative Mutant Reveals a Stalled Intermediate State of Pore Maturation. 著者: Harry Scott / Wei Huang / Kiran Andra / Sireesha Mamillapalli / Srinivas Gonti / Alexander Day / Kaiming Zhang / Nurjahan Mehzabeen / Kevin P Battaile / Anjali Raju / Scott Lovell / James G ...著者: Harry Scott / Wei Huang / Kiran Andra / Sireesha Mamillapalli / Srinivas Gonti / Alexander Day / Kaiming Zhang / Nurjahan Mehzabeen / Kevin P Battaile / Anjali Raju / Scott Lovell / James G Bann / Derek J Taylor / 要旨: The tripartite protein complex produced by anthrax bacteria (Bacillus anthracis) is a member of the AB family of β-barrel pore-forming toxins. The protective antigen (PA) component forms an ...The tripartite protein complex produced by anthrax bacteria (Bacillus anthracis) is a member of the AB family of β-barrel pore-forming toxins. The protective antigen (PA) component forms an oligomeric prepore that assembles on the host cell surface and serves as a scaffold for binding of lethal and edema factors. Following endocytosis, the acidic environment of the late endosome triggers a pH-induced conformational rearrangement to promote maturation of the PA prepore to a functional, membrane spanning pore that facilitates delivery of lethal and edema factors to the cytosol of the infected host. Here, we show that the dominant-negative D425A mutant of PA stalls anthrax pore maturation in an intermediate state at acidic pH. Our 2.7 Å cryo-EM structure of the intermediate state reveals structural rearrangements that involve constriction of the oligomeric pore combined with an intramolecular dissociation of the pore-forming module. In addition to defining the early stages of anthrax pore maturation, the structure identifies asymmetric conformational changes in the oligomeric pore that are influenced by the precise configuration of adjacent protomers.
解像度: 5.5→44.83 Å / Cor.coef. Fo:Fc: 0.898 / Cor.coef. Fo:Fc free: 0.873 / 交差検証法: THROUGHOUT / σ(F): 0 / SU Rfree Blow DPI: 1.587 詳細: Rigid body refinement with B-factors set to the Wilson B-factor