Table 2.

Expression of the most relevant salt-stress response systems in R. sphaeroides 2.4.1

Function and locus	Annotated producta	Fold change at:b
		7 min	45 min
Compatible solute synthesis
RSP0948-RSP0949	OtsB, trehalose phosphatase	6.5	11.8
	OtsA, trehalose 6-phosphate synthase	2.8	16.2
RSP2446	TreS, trehalose hydrolase	NC	3.5
RSP2450, RSP2452	TreZ, maltooligosyltrehalose trehalohydrolase	NC	NC
	TreY, maltooligosyltrehalose synthase	NC	NC
Compatible solute transport
RSP3057-RSP3059	ProX, ABC-type glycine betaine/l-proline transporter, periplasmic substrate binding protein	NC	17.4
	ProW, transporter permease protein	3.7	56.4
	ProV, transporter inner membrane ATPase protein	8.9	53.5
RSP3998-RSP4000	ProV1, ABC-type glycine betaine/l-proline transporter, inner membrane ATPase protein	3.2	NC
	ProW1, transporter permease protein	NC	NC
	ProX1, transporter periplasmic substrate binding protein	NC	NC
RSP2179-RSP2181	ProX2W2V2, ABC-type glycine betaine/l-proline transporter	NC	NC
RSP3080	BetS, BCCT family choline/carnitine/betaine transporter	NC	4.0
Cation (potassium) uptake
RSP1265-RSP1269	KdpABC, K+-transporter	NC	NC
RSP1853-RSP1854, RSP2841-RSP2842	TrkH2H3, TrkA, TrkH1, Trk-type K+ transporter	NC	NC
Additional candidate salt stress tolerance genes
RSP0697	UspA, universal stress response protein A	NC	2.5
RSP2380	CatC, catalase	NC	2.9
RSP2395	BCCP, cytochrome c peroxidase	5.6	5.7
RSP0910-RSP0912	DctP, TRAP dicarboxylate family transporter substrate-binding protein	NC	0.06
	DctQ, transporter subunit	NC	0.04
	DctM, transporter subunit	NC	0.06
RSP0634-RSP0636	DctP-type subunit, TRAP dicarboxylate family transporter	NC	12.1
	DctQ-type transporter subunit	NC	17.7
	DctM-type transporter subunit	NC	6.7

^aAs annotated at NCBI (http://www.ncbi.nlm.nih.gov).

^bNC, no change.