4TLW

CARDS TOXIN, FULL-LENGTH

4TLW の概要

• エントリーDOI: 10.2210/pdb4tlw/pdb
• 関連するPDBエントリー: 4TLV
• 分子名称: ADP-ribosylating toxin CARDS (2 entities in total)
• 機能のキーワード: mycoplasma pneumoniae, virulence, atypical pneumonia, community acquired respiratory distress syndrome, adp-ribosyl transferase, toxin, transferase
• 由来する生物種: Mycoplasma pneumoniae
• 細胞内の位置: Cell membrane ; Peripheral membrane protein ; Extracellular side : P75409
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 70627.67

構造登録者

Becker, A.,GALALELDEEN, A.,Taylor, A.B.,Hart, P.J. (登録日: 2014-05-30, 公開日: 2015-04-08, 最終更新日: 2024-11-20)

主引用文献

Becker, A.,Kannan, T.R.,Taylor, A.B.,Pakhomova, O.N.,Zhang, Y.,Somarajan, S.R.,Galaleldeen, A.,Holloway, S.P.,Baseman, J.B.,Hart, P.J.
Structure of CARDS toxin, a unique ADP-ribosylating and vacuolating cytotoxin from Mycoplasma pneumoniae.
Proc.Natl.Acad.Sci.USA, 112:5165-5170, 2015

PubMed Abstract: Mycoplasma pneumoniae (Mp) infections cause tracheobronchitis and "walking" pneumonia, and are linked to asthma and other reactive airway diseases. As part of the infectious process, the bacterium expresses a 591-aa virulence factor with both mono-ADP ribosyltransferase (mART) and vacuolating activities known as Community-Acquired Respiratory Distress Syndrome Toxin (CARDS TX). CARDS TX binds to human surfactant protein A and annexin A2 on airway epithelial cells and is internalized, leading to a range of pathogenetic events. Here we present the structure of CARDS TX, a triangular molecule in which N-terminal mART and C-terminal tandem β-trefoil domains associate to form an overall architecture distinct from other well-recognized ADP-ribosylating bacterial toxins. We demonstrate that CARDS TX binds phosphatidylcholine and sphingomyelin specifically over other membrane lipids, and that cell surface binding and internalization activities are housed within the C-terminal β-trefoil domain. The results enhance our understanding of Mp pathogenicity and suggest a novel avenue for the development of therapies to treat Mp-associated asthma and other acute and chronic airway diseases.

PubMed: 25848012
DOI: 10.1073/pnas.1420308112

実験手法

X-RAY DIFFRACTION (2.55 Å)