BIOL 2P98 Lecture Notes - Lecture 8: Polysaccharide, Pilus, Basal Body
19 Jan 2016
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Fimbriae and pilli: filamentous proteins extending from surface of cell, fimbriae enable cells to stick to surfaces, pilli are longer & thicker, with fewer present on cell surface, many different types, facilitate genetic exchange by conjugation. September 23, 2015: adhesion to specific host tissues, twitching motility. Flagella structure: three main components, basal body: the base & motor of the flagella. Anchors the flagella in cytoplasmic membrane & cell wall: hook: links basal body & filament, filament: extends from the cell surface to the tip. Composed of a hollow rigid cylinder of flagellin protein. Helical: basal body motor rotates the flagella much like the propeller on a boat, rotation powered by proton (h+) movement through mot proteins in motor the basal body, no atp involved all based on the structure (bacterial) Archaea flagella: power swimming by rotation, much like bacteria, however , thinner in diameter than bacteria, = slower swimming, made of several different flagellin proteins with little similarity to.
