E.coli O157:H7 Sakai (RIMD0509952) chromosome sequence has been deposited DDBJ/EMBL/GenBank under the accession numbers BA000007 and AP002550 -AP002569. The two plasmid sequences had been deposited with DDBJ/EMBL/GenBank under the accession numbers AB011549 for pO157 and AB011548 for pOSAK1.