Metallosphaera sedula gen, and sp. nov. Represents a New Genus of Aerobic, Metal-Mobilizing, Thermoacidophilic Archaebacteria

Abstract

Thermosipho africanus gen. nov., a Member of the "Thermotogales"

Distribution of Complex and Core Lipids within New Hyperthermophilic Members of the Archaea Domain

“…They grow from 68 to 80 °C. One of these isolates, the TH2 strain, on the basis of distinct physiological and molecular properties, has been described as type strain of the new genus Metallosphaera (Metallosphaera sedula TH2, DSM 348), while Sp3a can be considered as a strain of the same species (Huber et al, 1989). The analysis of quinone content of the isolates has been particularly useful in that the organisms belonging to the Sulfolobales order all possess benzothiophenquinones instead of naphthoquinone found in halophiles and in other thermophilic organisms .…”

Sulfolobus metallicus, sp. nov., a Novel Strictly Chemolithoautotrophic Thermophilic Archaeal Species of Metal-Mobilizers

“…In addition, the Sulfolobaceae possess glycoprotein subunit cell envelopes and caldariellaquinone (Weiss, 1974;Zillig et al, 1980;Huber et al, 1989;de Rosa and Gambacorta, 1988). The different genera within the Sulfolobaceae can be distinguished from each other by their metabolic and biochemical properties: Members of Sulfolobus exhibit a GC-content of around 37 mol% and are able to utilize sugars, amino acids, and complex organic substances as energy and carbon sources (Brock et al, 1972;Zillig et al, 1980).…”

Bioenergetic studies of coal sulfur oxidation by extremely thermophilic bacteria. Final report, September 15, 1992--August 31, 1997

“…Culture temperature was shifted by transferring bottles to different oil shaker baths at 70"C, 80°C and 85°C. These temperatures were chosen based on results from other reported heat shock experiments with related thermoacidophiles (15,36), given knowledge of the growth range of M. sedula (14). It was desired to have a sub-maximal temperature (70"C), a temperature at the high end of the growth range (80°C) and a potentially lethal temperature (85°C).…”

“…Thermotolerance is usually defined as a transient resistance to lethal thermal treatment which can be influenced by prior exposure to sub-lethal heat treatment (14). The temperature of the sublethal level and length of exposure to this temperature are apparently important in imparting thermotolerance (23).…”