O-glycosylation modification is crucial for the function of T9SS core component protein GldL in Cytophaga hutchinsonii.
The type IX secretion system (T9SS) in Cytophaga hutchinsonii drives essential processes such as cellulose degradation and gliding motility. The T9SS core complex consists of GldK, GldL, GldM, and GldN. Among these, the inner membrane protein GldL bridges the cytoplasmic and periplasmic modules and interacts with GldM...