MGY377H1 Final: Study notes for exam
Document Summary
In various ways: flagella based, gliding motility, twitching motility. Access new environments: for survival, for pathogenesis. Drive by surface appendages: flagella, pili. Most motile bacteria use flagella: movement in liquid, and on moist surfaces. Helically shaped: constant distance between curves, called wavelength, wavelength constant for given organism. Distribution varies: polar one per cell, peritrichous multiple per cell all around cell, lophotrichous multiple per cell but stem from one end only. Structure: filament rigid, helical structure extending from basal body. composed of protein flagellin, arranged in helical chains to form hollow core. flagellin travels through hollow core of filament to be attached at the growing tip. cap proteins help assemble flagellin into growing tip of flagella: hook. flexible coupling between filament and basal body: basal body. rod and a series of rings that anchor the flagellum to cell. Motility: driven by proton motive force. as protons travel through channel creates energy.