GIB (Genome Information Broker for Microbial Genomes) provides a comprehensive view of the complete microbial genome sequences.
Because the genome sequence data of Yersina pestis CO92 was released, we incorporated it to GIB, and now you can search those data.

Reference:
Genome sequence of Yersinia pestis, the causative agent of plague, Nature 413, 523-527(2001)