Interestingly, the expression pattern of the proteasome alpha subunit ZmSIP2 is down-regulated in SG200ΔSee1-infected leaves in comparison with SG200 infection, but the expression of the catalytic beta-1 proteasome subunit PBA1 (GRMZM2G1775) does not change during infection (Supplementary Fig. S4) (Villajuana-Bonequi et al., 2019), suggesting a normal core protease proteasome activity but a somehow disrupted structure of the 20S barrel in the absence of UmSee1. Here, PSMG1 is linked to infection.