5X1E

Structure of DotL(656-783)-IcmS-IcmW derived from Legionella pneumophila

5X1E の概要

• エントリーDOI: 10.2210/pdb5x1e/pdb
• 関連するPDBエントリー: 5X1H
• 分子名称: IcmS, IcmW, IcmO (DotL), ... (6 entities in total)
• 機能のキーワード: type iv secretion system, coupling protein complex, effector translocation, protein transport
• 由来する生物種: Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513); 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 80905.58

構造登録者

Kim, J.D.,Kwak, M.J.,Oh, B.H. (登録日: 2017-01-25, 公開日: 2017-06-14, 最終更新日: 2024-03-20)

主引用文献

Kwak, M.J.,Kim, J.D.,Kim, H.,Kim, C.,Bowman, J.W.,Kim, S.,Joo, K.,Lee, J.,Jin, K.S.,Kim, Y.G.,Lee, N.K.,Jung, J.U.,Oh, B.H.
Architecture of the type IV coupling protein complex of Legionella pneumophila
Nat Microbiol, 2:17114-17114, 2017

PubMed Abstract: Many bacteria, including Legionella pneumophila, rely on the type IV secretion system to translocate a repertoire of effector proteins into the hosts for their survival and growth. Type IV coupling protein (T4CP) is a hexameric ATPase that links translocating substrates to the transenvelope secretion conduit. Yet, how a large number of effector proteins are selectively recruited and processed by T4CPs remains enigmatic. DotL, the T4CP of L. pneumophila, contains an ATPase domain and a C-terminal extension whose function is unknown. Unlike T4CPs involved in plasmid DNA translocation, DotL appeared to function by forming a multiprotein complex with four other proteins. Here, we show that the C-terminal extension of DotL interacts with DotN, IcmS, IcmW and an additionally identified subunit LvgA, and that this pentameric assembly binds Legionella effector proteins. We determined the crystal structure of this assembly and built an architecture of the T4CP holocomplex by combining a homology model of the ATPase domain of DotL. The holocomplex is a hexamer of a bipartite structure composed of a membrane-proximal ATPase domain and a membrane-distal substrate-recognition assembly. The presented information demonstrates the architecture and functional dissection of the multiprotein T4CP complexes and provides important insights into their substrate recruitment and processing.

PubMed: 28714967
DOI: 10.1038/nmicrobiol.2017.114

実験手法

X-RAY DIFFRACTION (1.999 Å)