Lateral gene transfer and ancient paralogy of operons containing redundant copies of tryptophan-pathway genes in Xylellaspecies and in heterocystous cyanobacteria

Table 2 Did operonic genes originate by LGT?

			First BLAST hit		Second BLAST hit
Gene product		% GC	Organism	% Identity	Organism	% Identity
Anabaena	AroA_Iβ	46	Nostoc punctiforme	75	Nostoc punctiforme	71
	TrpB	47	Nostoc punctiforme	76	Anabaena sp.	60
	TrpEb	46	Nostoc punctiforme	88	Anabaena sp.	88
	TrpEa	46	Nostoc punctiforme	85	Anabaena sp.	74
	Qor	45	Enterococcus faecalis	40	Streptomyces coelicolor	37
	TrpD	41	Nostoc punctiforme	72	Anabaena sp.	56
	TrpAa•TrpAb	41	Nostoc punctiforme	81	Anabaena sp.	77
	Gpm1	41	Nostoc punctiforme	70	Streptomyces coelicolor	51
	ORF	41	Nostoc punctiforme	58	Streptomyces coelicolor	30
	AroB	41	Nostoc punctiforme	68	Nostoc punctiforme	62
	TyrA_(p)	38	Nostoc punctiforme	72	Yersinia pseudotuberculosis	43
Nostoc^†	AroA_Iβ	46	Anabaena sp.	80	Nostoc punctiforme	79
	TrpB	47	Anabaena sp.	77	Nostoc punctiforme	64
	TrpEb	46	Anabaena sp.	88	Nostoc punctiforme	88
	TyrP_1	44	Nostoc punctiforme	56	Nitrosomonas europeae	30
	TrpEa	46	Anabaena sp.	85	Anabaena sp.	74
	TrpD	42	Anabaena sp.	72	Anabaena sp.	68
	TrpAa•TrpAb	42	Anabaena sp.	81	Anabaena sp.	76
	AroB	43	Anabaena sp.	68	Nostoc punctiforme	68
	FrnE	40	Deinococcus radiodurans	30	Rhodobacter capsulatus	29
	TyrA_(p)	39	Anabaena sp.	72	Yersinia pseudotuberculosis	38

*Anabaena sp. PCC 7120 has a genomic GC ratio of 42.82%. ^†Nostoc punctiforme has a genomic GC ratio of 43.90%.

ISSN: 1474-760X