Download MendeleyBacterial OTU deubiquitinases regulate substrate ubiquitination upon Legionella infection.
Shin, D., Bhattacharya, A., Cheng, Y.L., Alonso, M.C., Mehdipour, A.R., van der Heden van Noort, G.J., Ovaa, H., Hummer, G., Dikic, I.(2020) Elife 9
- PubMed: 33185526
- DOI: https://doi.org/10.7554/eLife.58277
- Primary Citation of Related Structures:
6YK8 - PubMed Abstract:
Legionella pneumophila causes a severe pneumonia known as Legionnaires' disease. During the infection, Legionella injects more than 300 effector proteins into host cells. Among them are enzymes involved in altering the host-ubiquitination system. Here, we identified two L egionella OT U (ovarian tumor)-like deubiquitinases (LOT-DUBs; LotB [Lpg1621/Ceg23] and LotC [Lpg2529]). The crystal structure of the LotC catalytic core (LotC 14-310 ) was determined at 2.4 Å. Unlike the classical OTU-family, the LOT-family shows an extended helical lobe between the Cys-loop and the variable loop, which defines them as a unique class of OTU-DUBs. LotB has an additional ubiquitin-binding site (S1'), which enables the specific cleavage of Lys63-linked polyubiquitin chains. By contrast, LotC only contains the S1 site and cleaves different species of ubiquitin chains. MS analysis of LotB and LotC identified different categories of host-interacting proteins and substrates. Together, our results provide new structural insights into bacterial OTU-DUBs and indicate distinct roles in host-pathogen interactions.
Organizational Affiliation:
Institute of Biochemistry II, Faculty of Medicine, Goethe University Frankfurt, Frankfurt, Germany.
