Secreted effector that suppresses pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) in host plants (PubMed:30945786). Suppresses both defense-related brassinosteroid (BR) and ERECTA (ER) signaling pathways in planta by interacting with host BRI1 kinase inhibitor 1 (BKI1) at the host plasma membrane, leading to a host dwarf phenotype (PubMed:30945786). Interacts with host BKI1. Expression is induced during infection of host grapevine. The RxLR-dEER motif acts to carry the protein into the host cell cytoplasm through binding to cell surface phosphatidylinositol-3-phosphate. The 39 amino acids in the C-terminus (residues 120 to 158) are sufficient for binding the host BKI1. Belongs to the RxLR effector family.