Structural highlights
Function
HPAB2_PSESM Effector protein involved in gene-for-gene resistance in tomato plants. It is recognized by the host Pto resistance protein and elicits Pto and Prf-dependent hypersensitive response (HR) and programmed cell death (PCD), resulting in host immunity. In susceptible plants, acts as a virulence factor by suppressing PCD and HR-based plant immunity. This function requires its E3 ubiquitin ligase activity probably by recruiting E2 enzymes and transferring ubiquitin molecules to cellular proteins involved in regulation of PCD and targeting them for degradation. Also, induces expression of host genes involved in ethylene biosynthesis and signaling, in particular ACO1 and ACO2, encoding the ethylene-forming enzyme ACC oxidase.[1] [2] [3] [4] [5]
See Also
References
- ↑ Kim YJ, Lin NC, Martin GB. Two distinct Pseudomonas effector proteins interact with the Pto kinase and activate plant immunity. Cell. 2002 May 31;109(5):589-98. PMID:12062102
- ↑ Abramovitch RB, Kim YJ, Chen S, Dickman MB, Martin GB. Pseudomonas type III effector AvrPtoB induces plant disease susceptibility by inhibition of host programmed cell death. EMBO J. 2003 Jan 2;22(1):60-9. PMID:12505984 doi:http://dx.doi.org/10.1093/emboj/cdg006
- ↑ Cohn JR, Martin GB. Pseudomonas syringae pv. tomato type III effectors AvrPto and AvrPtoB promote ethylene-dependent cell death in tomato. Plant J. 2005 Oct;44(1):139-54. PMID:16167902 doi:http://dx.doi.org/TPJ2516
- ↑ Abramovitch RB, Janjusevic R, Stebbins CE, Martin GB. Type III effector AvrPtoB requires intrinsic E3 ubiquitin ligase activity to suppress plant cell death and immunity. Proc Natl Acad Sci U S A. 2006 Feb 21;103(8):2851-6. Epub 2006 Feb 13. PMID:16477026 doi:http://dx.doi.org/0507892103
- ↑ Janjusevic R, Abramovitch RB, Martin GB, Stebbins CE. A bacterial inhibitor of host programmed cell death defenses is an E3 ubiquitin ligase. Science. 2006 Jan 13;311(5758):222-6. Epub 2005 Dec 22. PMID:16373536 doi:http://dx.doi.org/1120131
