Secreted effector that acts as an elicitor of hypersensitive response (HR) specifically on plants carrying defense protein R4, through its interaction with this protein .
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Avirulence protein. Acts as a transcription factor in C.annuum plants. In susceptible plants lacking the Bs3 resistance gene induces expression of a number of genes, including genes homologous to a family of auxin-induced genes, alpha-expansin genes, pectate lyase, anthocyanidin glucoside rhamnosyl transferase and at least one transcription factor, UPA20. Their expression leads to plant hypertrophy in mesophyll cells, probably mainly mediated by UPA20 (PubMed:17962565). In resistant plants induces the hypersensitive response (HR), by inducing transcription of plant Bs3 which induces HR; a mutated AvrBs3 missing repeats 11-14 does not induce expression of Bs3 but does induce Bs3-E, a Bs3 allele with a modified promoter (PubMed:17962564). Binds DNA corresponding to the upa-box in sequence-specfic manner.
Avirulence protein, induces a hypersensitive response (HR) in tomato cv. Hawaii 7998 (S.lycopersicum) carrying the resistance gene.
Avirulence protein. Induces the hypersensitive response (HR)in rice plants carrying the resistance gene Xa10. Activity depends on the presence of the core repeat domains; replacement with repeat domains from other proteins (AvrBs3 of X.euvesicatoria (AC P14727) or AvrXa7 of this organism) does not elicit the HR. Probably acts as a transcription factor in its host plant (rice) to induce plant resistance or disease.
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