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Microscopic Clutch Puts Flagellum In Neutral Monday, June 23, 2008 - Ehud Rattner Home >> Headlines >> Science   
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A tiny but powerful engine that propels the bacterium Bacillus subtilis through liquids is disengaged from the corkscrew-like flagellum by a protein clutch, Indiana University Bloomington and Harvard University scientists have learned. Scientists have long known what drives the flagellum to spin, but what causes the flagellum to stop spinning -- temporarily or permanently -- was unknown. The action of the protein they discovered, EpsE, is very similar to that of a car clutch. (source: sciencedaily.com)
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