Y. enterocolitica palearctica O:3/4-specific chromosomally encoded type three secretion system. This system is similar to the SPI-2 of Salmonella. The translocon of the apparatus is present, but SsaGH proteins of the needle are missing; also SsaR from the inner membrane ring. In addition, no effector proteins are linked directly to the secretion system gene cluster in the genome strain Y11.
Batzilla et al. BMC Genomics 2011 12:348 doi:10.1186/1471-2164-12-348