TABLE 1.

Distribution of OS3173-like polA genes in metagenomic databases.

	Hot springa	Temp. (°C)	pH	% AA IDb	Largest scaffolds (kbp)	Genbank or IMG accession
Yellowstone National Park	Octopus	85	8.0	82–90	37, 28	MK783188.1, JGI20132J14458_1000016
	Conch	85	8.8	66–91	37, 32	Ga0080008_153848, Ga0080008_158027
	Joseph’s Coat	74	2.5	25–37	39	Ga0080003_1000231
	Bath	85	8.0	70–94	1	2007311021
	Black Pool	73	8.0	56–89	8	Ga0111098_10004
	Calcite	75	7.8	39–49	32	YNPsite12_CeleraDRAF_ scf1119014592999
	Bechler	81	7.8	83–92	0.7	YNPsite13_CeleraDRAF_29640
United States Great Basin	Great Boiling	80	6.4	35–50	41	Ga0097684_1000009
	Sandy’s West	86.6	7.0	34–57	7	Ga0105155_1001723
	Little Hot Creek	82	6.8	33–50	2	Ga0105158_1016092

^aMetagenomes from YNP (Inskeep et al., 2013; Takacs-Vesbach et al., 2013; Inskeep and Jay, unpl.). ^bRange of amino acid identities to the full-length OS3173 Pol based on tBLASTx.