Rice OsERG3 encodes an unusual small C2-domain protein containing a Ca2+-binding module but lacking phospholipid-binding properties

► We examine rice small C2-domain proteins, which are responsive to elicitor signals. ► We show that OsERG3 binds Ca2+ ions but not phospholipids. ► OsERG3 keeps its cytosolic location even in the presence of elicitor signals.