TABLE 1.

Comparison of non-PU insertion sites of the transposable module in several enterobacteria

Species	No. of clones	Flanking sequence upstream of the insertion sitea	Duplication	No. of residues identical to 17-bp consensus
		ATAC
E. coli PU consensus		AT GCCGAT GC GCG	NNN	17
		TGGT
Y. pestis	2	ATA GCCGGAG GT TTTTC A	TAT	10
Y. pestis	3	TTT GCCGGAT AC AGCCG A	TAG	12
Y. pestis	1	TAC GCCGGAT TA CCCAA	CTG	9
Y. pestis	1	AAT GCCGGTC TG GGGT	AAC	10
Y. pestisb	3	TTT GGGGTTC AG TGCA	CGG	6
Y. pestisb	1	TTT GGGGTTC AG TGCACG	GCC	7
K. pneumoniae	1	TGG GCCGGAT GG GCCGA	CAG	10
K. pneumoniae	1	CCT GCCGGAT GA CACGT	TTA	13
K. pneumoniae	1	CAG GCCGGAT GG AACGG	GGT	12
K. pneumoniae	1	ACG GCCTTCG GG GGCGA	AGTG	10
K. pneumoniae	1	ACT TCCACCA GC AGCGG	AAC	9
K. oxytoca	1	AGT GCCTGAT GG GCGGC	ATG	13
K. oxytoca	1	ACC GCCGGAT CG CGG	CGT	9
K. oxytoca	1	GAC GCCGGAT AC CTGC	GCG	9
E. coli	1	CTT GCCGGAT AT TCA	CAG	9
E. coli	1	CAA GCCGGAT CG TCCGG	GAAC	10

^aFlanking sequences left to insertion sites are aligned under the E. coli Y PU consensus 5′ end. Identities with the E. coli Y PU consensus are underlined, and identities with the insertion consensus that we have defined (5′ GCCGG3′) are twice underlined. Duplicated nucleotides are indicated in bold.

^bInsertion in these clones occurred at the same location on the chromosome, but the exact site of transposition in the last clone is shifted by 2 bp compared with the three others.