Enrichment of colibactin-associated mutational signatures in unexplained colorectal polyposis patients

Colibactin, a genotoxin produced by polyketide synthase harboring (pks+) bacteria, induces doublestrand breaks and chromosome aberrations. Consequently, enrichment of pks+Escherichia coli in colorectal cancer and polyposis suggests a possible carcinogenic effect in the large intestine.