TABLE 2.

Putative LexA binding sites in the genome of Nostoc sp. strain PCC 7120

Sequence	ORF	Positiona	Protein annotationb	Putative function/comment/reference
AGTACTTTTGTTCC	all0061	−869	Site-specific DNA-methyltransferase	Inside alr0063 and rbfA
AGTACTTATGTACT	alr0088	−28	Single-stranded DNA-binding protein	27
AGTACTTTTGTACT	asl0401	−71	Unknown protein	Probable nitroreductase
AGAACCAGAGTTCC	all0687N	−246	[NiFe] uptake hydrogenase large subunit, N end fragment	Inside all0688 (hupS), located upstream from all0687N
GGTACTCTGGTTCG	alr0750	−142	Hypothetical protein	Encodes universal stress protein (Usp)
GGAACAGGAGTACT	all0998	+630	Putative catalase	Inside gene, protein contains manganese catalase domain
AGTACTTAAGTACT	alr1041	−175	Fructose-1,6-bisphosphatase
AGAACTTTAGTTCT	alr1194	−425	Two-component response regulator
GGTACTGTAGTACG	all1512	−311	Cytochrome b6/f-complex iron-sulfur protein PetC	Inside asl1513, encodes hypothetical protein
AGAACAATTGTACC	alr1855	−150	Unknown protein	Similar to DNA double-strand break repair rad50 ATPase gene
GGTACTGATGTTCC	alr1879	+228	Glycogen synthase	Inside gene
AGTACATAAGTACT	alr2104	−59	Probable methyltransferase
AGAACTTTAGTTCT	alr2481	−265	Two-component sensor histidine kinase
AGTACAGAAGTTCT	all3374	+654	DNA repair and genetic recombination protein RecF (encoded by recF)	Inside gene
AGTACTTAAGTACC	all3503	−109	Probable integrase
AGTACTATTGTTCT	alr3716	−84	Excinuclease ABC subunit A (encoded by uvrA)	27
AGTACCAAAGTTCT	asl3860	−46	Glutaredoxin
GGTACTTGTGTTCC	all3866	−234	Probable dioxygenase, Rieske iron-sulfur component	Inside alr3867, encodes putative aminotransferase
GGTACTTTTGTTCG	alr4239	−241	Toxin secretion ABC transporter ATP-binding protein	Upstream from alr4240, encodes RTX toxin transporter
GGTACAAATGTACG	all4790	−45	Hypothetical protein	Upstream from all4789, encodes DNA helicase Re cG
AGTACTAATGTTCT	alr4908	−47	SOS function regulatory protein, LexA repressor	Upstream from alr4909, similar to DNA repair gene rad25 (27)
AGTACTATGGTACG	asr4942	−53	Unknown protein	Upstream from alr4943, encodes putative 4Fe-4S cluster binding protein
GGTACTCCAGTACG	all0475	+528	Probable short-chain dehydrogenase	Inside gene
GGTATTTATGTACT	alr1044	−472	Transcriptional regulator
GGTATCGCTGTACG	alr1095	+687	GAPDH (encoded by gap3)	Inside gene
GGTATCGTTGTACT	alr2780	−276	DNA topoisomerase I
AGAATTAGTGTACC	all2951	+33	Probable helicase protein	Inside gene
AGTATTATTGTTCC	all5215	−104	Transcriptional-repair coupling factor	Helicase domain
GTATCCAAGTTCC	all3735	−291	Fructose-bisphosphate aldolase class I	Inside all3736, encodes unknown protein
AGTATATCTGTTCT	all3272	−66	Recombination protein RecA (encoded by recA)	27

^aPosition of the first base pair in the motif in relation to the TSP of the downstream gene.

^bAccording to Cyanobase (http://www.kazusa.or.jp/cyano/cyano.html).