Lectin which functions in endoplasmic reticulum (ER) quality control and ER-associated degradation (ERAD). May bind terminally misfolded non-glycosylated proteins as well as improperly folded glycoproteins, retain them in the ER, and possibly transfer them to the ubiquitination machinery and promote their degradation. Targets the misfolded LRR receptor kinase BRI1 and the misfolded receptor-like kinase EFR. Interacts with HRD3A. No visible phenotype under normal growth conditions, but mutant plants have enhanced sensitivity to salt stress. Belongs to the OS-9 family.