Date of this Version
Journal of Bacteriology, June 2007, p. 4305–4309 Vol. 189, No. 11
Flagellation in archaea is widespread and is involved in swimming motility. Here, we demonstrate that the
structural flagellin gene from the crenarchaeaon Sulfolobus solfataricus is highly expressed in stationary-phasegrown
cells and under unfavorable nutritional conditions. A mutant in a flagellar auxiliary gene, flaJ, was
found to be nonmotile. Electron microscopic imaging of the flagellum indicates that the filaments are composed
of right-handed helices.