An exoproteome approach to monitor safety of a cheese-isolated Lactococcus lactis

► Bacterial strain-typing is an important issue in food safety. ► The potential starter L. lactis 11D was analyzed by an exoproteome approach. ► The exoproteome showed high presence of moonlighting proteins involved in adhesion. ► A DIGE exoproteome comparing growth on glucose and on trehalose was performed. ► Chitinase biosynthesis was enhanced in presence of trehalose.