Invasion protein; Involved in the triggering of intracellular events that lead to microbial internalization. These events include increase in calcium level, redistribution of actin microfilaments, and changes in the normal structure of the microvilli. Encoded within the type III secretion system (SPI-1 TTSS), it is essential for the translocation of protein effectors into host cells. Forms a complex with SipB and SipC in the presence of their chaperone SicA. Positively regulates the secretion of SPI-1 TTSS effector proteins SipB, SipC and SipD and negatively influences the secretion of [...]

Outer membrane invasion protein; Component of the type III secretion system (T3SS), also called injectisome, which is used to inject bacterial effector proteins into eukaryotic host cells. Forms a ring-shaped multimeric structure with an apparent central pore in the outer membrane.

Invasion protein; Involved in the invasion of the cells of the intestinal epithelium. Could be involved in the translocation of the InvE protein; Belongs to the FHIPEP (flagella/HR/invasion proteins export pore) family.

araC family bacterial regulatory helix-turn-helix protein; Positive regulator of the expression of the invasion- associated type III secretion system encoded within SPI-1 (pathogenicity island 1).

Regulatory helix-turn-helix proteins, araC family; HilD (gi|4455108).

Cell invasion protein; Actin-binding protein that interferes with host cell actin cytoskeleton. Nucleates actin polymerization and condensates actin filaments into cables (bundling). SipA potenciates SipC activity and both are required for an efficient bacterial internalization by the host cell.

Cell invasion protein; Required for entry into the host cell through presentation or delivery of SipC at the host cell plasma membrane. Along with SipC, is necessary for the transfer of other effector proteins into the host cell. Induces macrophage apoptosis either by binding and activating the proapoptotic enzyme caspase-1 (caspase-1 dependent), resulting in the release of interleukin-1 beta active form, or by disrupting mitochondria and inducing autophagy (caspase-1 independent). The former is dependent of its membrane-fusion activity. The SipBC complex, in association with its chape [...]

Surface presentation of antigens; Necessary for efficient entry of S.typhimurium into cultured epithelial cells. Probable catalytic subunit of a protein translocase. May energize the protein export apparatus encoded in the inv locus which is required for the surface presentation of determinants needed for the entry of salmonella species into mammalian cells.

Cell invasion protein; Actin-binding protein that interferes with host cell actin cytoskeleton. It stimulates actin polymerization and counteracts F- actin destabilizing proteins. Potentiates SipC activity; both are required for an efficient bacterial internalization. In vitro, forms a complex with host cell protein T-plastin increasing actin bundling. It inhibits ADF/cofilin-directed depolymerization both by preventing binding of ADF and cofilin and by displacing them from F-actin. Also protects F-actin from gelsolin-directed severing and reanneals gelsolin-severed F-actin fragments; [...]