Type III Secretion Systems

**Definition:** Multiprotein transmembrane complexes in GRAM-NEGATIVE BACTERIA involved in either the secretion of effector proteins from the bacterial cytoplasm into host cells, or the secretion and assembly of flagellar components. The major component of the T3SSs is called the injectosome or needle complex.

**Tree numbers:** - D05.500.890.500.875

**Synonyms:** - Bacterial Secretion System, Type III - T3SS Secretion System - Type III Secretion System - Type 3 Secretion Systems - Type 3 Secretion System