Aquifex aeolicus is one of the most thermophilic bacteria known. Although this organism is able to grow at a remarkable 96 °C, only a few specific indications of
heat-resistance are evident from the genome. Aquifex is thought to be one of the earliest bacteria to diverge from the evolutionary tree of the eubacteria; and further
analysis may throw light on the question of where the extreme thermophiles belong on the phylogenetic tree. Is this heat tolerance a legacy from the earliest of
bacterial forms or did it evolve much later to fill a vacant niche in the environment?
article The complete genome of the hyperthermophilic bacterium Aquifex aeolicus
GERARD DECKERT, PATRICK V. WARREN, TERRY GAASTERLAND, WILLIAM G. YOUNG, ANNA L. LENOX, DAVID E. GRAHAM, ROSS OVERBEEK, MARJORY A. SNEAD, MARTIN KELLER, MONETTE AUJAY, ROBERT HUBER, ROBERT A. FELDMAN, JAY M. SHORT, GARY J. OLSEN & RONALD V. SWANSON Nature392, 353-358 (26 March 1998)
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