GPR15 and infection: Because both SAP and BOB proteins seem to be associated with UPS via interaction with UPS subunits or components (Choi et al., 2012; Farmer et al., 2010; Fu et al., 2010; Gunsalus et al., 2005; Kang et al., 2017; Lloret et al., 2017; Saeki, 2017), the interaction of SlSAP3‐SlBOBs in planta might initiate an event that results in the degradation of one or both of them and of other unknown targeting proteins upon pathogen infection.