Genetic organization and sequence of the region encoding integrative functions from Lactobacillus gasseri temperate bacteriophage phi adh.

A 2.0-kb fragment from the Lactobacillus gasseri temperate bacteriophage phi adh contained the essential genetic determinants for site-specific integration. The nucleotide sequence of this fragment was determined. An open reading frame (intG), which adjoined the phage attachment site (attP), encoded a deduced protein related to the integrase family. The organization of this region was comparable to other phage site-specific recombination systems.