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Acidianus sulfidivorans sp. nov., an extremely acidophilic, thermophilic archaeon isolated from a solfatara on Lihir Island, Papua New Guinea, and emendation of the genus description

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Plumb, JJ and Haddad, CM and Gibson, JAE and Franzmann, PD (2007) Acidianus sulfidivorans sp. nov., an extremely acidophilic, thermophilic archaeon isolated from a solfatara on Lihir Island, Papua New Guinea, and emendation of the genus description. International Journal of Systematic and Evolutionary Microbiology, 57. pp. 1418-1423. ISSN 1466-5026

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Abstract

A novel, extremely thermoacidophilic, obligately chemolithotrophic archaeon (strain JP7T) was isolated from a solfatara on Lihir Island, Papua New Guinea. Cells of this organism were non-motile, Gram-negative staining, irregular-shaped cocci, 0.5–1.5 µm in size, that grew aerobically by oxidation of sulfur, Fe2+ or mineral sulfides. Cells grew anaerobically using Fe3+ as a terminal electron acceptor and H2S as an electron donor but did not oxidize hydrogen with elemental sulfur as electron acceptor. Strain JP7T grew optimally at 74 °C (temperature range 45–83 °C) and pH 0.8–1.4 (pH range 0.35–3.0). On the basis of 16S rRNA gene sequence similarity, strain JP7T was shown to belong to the Sulfolobaceae, being most closely related to the type strains of Acidianus ambivalens (93.7 %) and Acidianus infernus (93.6 %). Cell-membrane lipid structure, DNA base composition and 16S rRNA gene sequence similarity data support the placement of this strain in the genus Acidianus. Differences in aerobic and anaerobic metabolism, temperature and pH range for growth, and 16S rRNA gene sequence differentiate strain JP7T from recognized species of the genus Acidianus, and an emendation of the description of the genus is proposed. Strain JP7T is considered to represent a novel species of the genus Acidianus, for which the name Acidianus sulfidivorans sp. nov. is proposed. The type strain is JP7T (=DSM 18786T=JCM 13667T).

Item Type: Article
Journal or Publication Title: International Journal of Systematic and Evolutionary Microbiology
Publisher: Society of General Microbiology
Page Range: pp. 1418-1423
ISSN: 1466-5026
Identification Number - DOI: 10.1099/ijs.0.64846-0
Date Deposited: 07 Apr 2008 14:16
Last Modified: 18 Nov 2014 03:34
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