MIC 102 Lecture Notes - Lecture 16: Arginine, Chromosome, Unicellular Organism
11 Nov 2017
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Adventurous: a form of gliding motility, slime nozzle propulsion, cell move independently. Social: twitching with type iv pilus, requires lps, cells move together as swarms. Reversal frequency controlled by the frz system, analogous to the chemotaxis systems we see in flagellated bacteria. Myxo swarms can prey on other microbes of many types: g+ and g- bacteria, yeast and fungus and some phages. Myxococcus secretes various antimicrobial compounds, antibiotics, proteases. Characteristics rippling behavior: one explanation is it"s a mechanism to distribute growth materials that do not normally diffuse well, frz system is required for myxo to move toward and stay in contact with prey. Development requires a large population working together. Vegetative cells have 3 fates during development: myxospore, peripheral rod, autolysis. Five extracellular signal are produced during development (a-e) Coordinates the developmental program and ties together individual cell state to population state: swarming aggregation mound formation fruiting body formation. B a d c (fast slow)
