Bacterial Motility Hugh B. Fackrell. 2 8/5/2015 Presentation Outline l Bacterial Flagella l Location...
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Bacterial Motility Bacterial Motility Hugh B. Fackrell
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Transcript of Bacterial Motility Hugh B. Fackrell. 2 8/5/2015 Presentation Outline l Bacterial Flagella l Location...
- Slide 1
- Bacterial Motility Hugh B. Fackrell
- Slide 2
- 2 8/5/2015 Presentation Outline l Bacterial Flagella l Location l Function l Structure l Bacterial vs eukaryotic flagella
- Slide 3
- 3 8/5/2015 Flagellum vs Pilus Pilus Flagellum
- Slide 4
- 4 8/5/2015 Pilus (fimbriae) l An appendage of the bacterial cell used for transfer of genetic information l Plural pili
- Slide 5
- 5 8/5/2015 Pili Transfer Plasmids
- Slide 6
- 6 8/5/2015 Bacterial Flagellum l A thin appendage arising from one or more locations on the surface of the cell wall l Cellular locomotion l Moves cell along gradients e.g. glucose
- Slide 7
- 7 8/5/2015 Types of Motility l Flagellated Flagellum- l coordinated movement l tumbling movement Axial filament- spirochetes l Gliding- no visible organelles
- Slide 8
- 8 8/5/2015 Location l Polar l Subpolar l Lateral l Lophotrichous l Amphitrichous l Peritrichous l Periplasmic
- Slide 9
- 9 8/5/2015 Polar Flagellum
- Slide 10
- 10 8/5/2015 Lophotrichous Flagella Spirillum volutns two or more flagella at the end of the microbe Photographs show growth of flagella during replication
- Slide 11
- 11 8/5/2015 Amphitrichous Flagella l Tufts of flagella at BOTH ends of the microbe
- Slide 12
- 12 8/5/2015 Peritrichous Flagella
- Slide 13
- 13 8/5/2015 Flagellar tufts
- Slide 14
- 14 8/5/2015 Flagellar tufts
- Slide 15
- 15 8/5/2015 Spirochetes have Periplasmic Flagella l Periplasmic flagella are also called the axial filament
- Slide 16
- 16 8/5/2015 Axial filaments
- Slide 17
- 17 8/5/2015 Bacterial Flagellum
- Slide 18
- 18 8/5/2015 Rings of Gram Negative Flagellum l M: cell Membrane l P: Peptidoglycan l L: Outer Layer l S: Spacer
- Slide 19
- 19 8/5/2015 Flagellar Structure (details)
- Slide 20
- 20 8/5/2015 Prokaryotic Flagellum
- Slide 21
- 21 8/5/2015 Flagellar Structures
- Slide 22
- 22 8/5/2015 Assembly of Flagellum
- Slide 23
- 23 8/5/2015 Demonstration of Chemotaxis l Capillary tube contains attractant chemical l Attractants: Glucose,Maltose, Alanine l Repellents: Indole, H+, OH-, fatty acids
- Slide 24
- 24 8/5/2015 Flagellar Rotation l Clockwise: Tumbling l Counterclockwise: coordinated l Alternate between two rotations
- Slide 25
- 25 8/5/2015 Run & Tumble motility
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- 26 8/5/2015 Regulation of Flagellar Movement
- Slide 27
- 27 8/5/2015 Movement of Flagella l Whip l Egg beater