Table 2.

Genes conserved in each of the Sulfolobus self-transmissable plasmids. Abbreviations: ORF = open reading frame; aa = amino acids; pI = isoelectric point; and TMH = transmembrane helix.

Section	ORF 1	Size range (aa)	Identity (%)	pI	TMH motifs	Homology
A	620	618–624	25–89	5–7.5	2	TrbE
A	311	222–312	15–83	9–10	0–1
A	780	660–780	19–88	5–7	1	Signal peptide protein
A	617	507–622	21–89	5–10	10–12
A	86b/138	86/138	17–68	~9	3
A	1044	1025–1044	33–91	8–9	2	TraG
	153	153–166	17–100	~10
	196	192–253	48–100	~10
C	102	102–108	25–100	4.5–7.5
C	106	99–165	64–99	~5		RepA
C	62	61–72	52–96	~5		CopG
C	87	87–92	51–89	~10		Leucine zipper
C	98	83–101	20–100	~10
	419	419–458	41–93	~10	4 pING1/0 others	Integrase
	77	73–99	46–96	10–11		plrA

¹ ORF numbers are from the pKEF9 genome. ORF153 is 100% conserved in pKEF9, pING1, pARN3 and pARN4.