Cytotoxic necrotizing factor-y boosts yersinia effector translocation by activating rac protein.
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Boyle, Erin C
MetadataShow full item record
AbstractPathogenic Yersinia spp. translocate the effectors YopT, YopE, and YopO/YpkA into target cells to inactivate Rho family GTP-binding proteins and block immune responses. Some Yersinia spp. also secrete the Rho protein activator cytotoxic necrotizing factor-Y (CNF-Y), but it has been unclear how the bacteria may benefit from Rho protein activation. We show here that CNF-Y increases Yop translocation in Yersinia enterocolitica-infected cells up to 5-fold. CNF-Y strongly activated RhoA and also delayed in time Rac1 and Cdc42, but when individually expressed, constitutively active mutants of Rac1, but not of RhoA, increased Yop translocation. Consistently, knock-out or knockdown of Rac1 but not of RhoA, -B, or -C inhibited Yersinia effector translocation in CNF-Y-treated and control cells. Activation or knockdown of Cdc42 also affected Yop translocation but much less efficiently than Rac. The increase in Yop translocation induced by CNF-Y was essentially independent of the presence of YopE, YopT, or YopO in the infecting Yersinia strain, indicating that none of the Yops reported to inhibit translocation could reverse the CNF-Y effect. In summary, the CNF-Y activity of Yersinia strongly enhances Yop translocation through activation of Rac.
CitationCytotoxic necrotizing factor-y boosts yersinia effector translocation by activating rac protein. 2013, 288 (32):23543-53 J. Biol. Chem.
AffiliationFrom the Institute for Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany.
The following license files are associated with this item:
- The cytotoxic necrotizing factor of Yersinia pseudotuberculosis (CNFY) enhances inflammation and Yop delivery during infection by activation of Rho GTPases.
- Authors: Schweer J, Kulkarni D, Kochut A, Pezoldt J, Pisano F, Pils MC, Genth H, Huehn J, Dersch P
- Issue date: 2013
- Analysis of chaperone-dependent Yop secretion/translocation and effector function using a mini-virulence plasmid of Yersinia enterocolitica.
- Authors: Trülzsch K, Roggenkamp A, Aepfelbacher M, Wilharm G, Ruckdeschel K, Heesemann J
- Issue date: 2003 Jun
- Yersinia controls type III effector delivery into host cells by modulating Rho activity.
- Authors: Mejía E, Bliska JB, Viboud GI
- Issue date: 2008 Jan
- Characterization of YopT effects on Rho GTPases in Yersinia enterocolitica-infected cells.
- Authors: Aepfelbacher M, Trasak C, Wilharm G, Wiedemann A, Trulzsch K, Krauss K, Gierschik P, Heesemann J
- Issue date: 2003 Aug 29
- The Yersinia enterocolitica type 3 secretion system (T3SS) as toolbox for studying the cell biological effects of bacterial Rho GTPase modulating T3SS effector proteins.
- Authors: Wölke S, Ackermann N, Heesemann J
- Issue date: 2011 Sep