Download MendeleyCrystal structure of the hexameric traffic ATPase of the Helicobacter pylori type IV secretion system.
Yeo, H.J., Savvides, S.N., Herr, A.B., Lanka, E., Waksman, G.(2000) Mol Cell 6: 1461-1472
- PubMed: 11163218
- DOI: https://doi.org/10.1016/s1097-2765(00)00142-8
- Primary Citation of Related Structures:
1G6O - PubMed Abstract:
The type IV secretion system of Helicobacter pylori consists of 10--15 proteins responsible for transport of the transforming protein CagA into target epithelial cells. Secretion of CagA crucially depends on the hexameric ATPase, HP0525, a member of the VirB11-PulE family. We present the crystal structure of a binary complex of HP0525 bound to ADP. Each monomer consists of two domains formed by the N- and C-terminal halves of the sequence. ADP is bound at the interface between the two domains. In the hexamer, the N- and C-terminal domains form two rings, which together form a chamber open on one side and closed on the other. A model is proposed in which HP0525 functions as an inner membrane pore, the closure and opening of which is regulated by ATP binding and ADP release.
Organizational Affiliation:
Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA.
