Component of the type III secretion system (T3SS), also called injectisome, which is used to inject bacterial effector proteins into eukaryotic host cells (By similarity). Acts as a regulator of the HrcN/SctN ATPase activity (By similarity). The core secretion machinery of the T3SS is composed of approximately 20 different proteins, including cytoplasmic components, a base, an export apparatus and a needle (By similarity). This subunit is part of the cytosolic complex (By similarity). Belongs to the SctL stator family.