Lecture 7 Flashcards
Glycocalyx
Extracellular polymeric material produced by some bacteria. Its a slime layer
Capsule
Well-organized and closely associated with the cell. Glycocalyces. Only if sucrose is present
Slime Layer
Much less organized then capsules and are not closely attached to the cell. They are stringy. Only if sucrose is present
Biofouling
The accumulation of microorganisms, plants, algae, or animals on wet surfaces
Flagellum
Protrudes from the cell body of some organisms. In Latin flagellum means whip. It is made of flagellin and many other structural proteins. It is like a motor and it moves the cell
Filament
This is like the propeller. There is a hook on the end and it produces tork
Hook
It is on the end of the filament and it produces tork which moves the cell
Stator
The stationary part of the rotary system. Contains the studs and C ring. Inside the membrane
Rotor
This turns. It contains the S ring and the M ring. Inside the membrane
Membrane bushings
One on the inside and one on the outside of the membrane. It prevents it from being pulled out of the membrane.
C-ring
It is involved in the switching of rotation.
Chemotaxis
Based on the direction of flagellar rotation
Run, Tumble
In a bundle=run, Spinning in opposite directions are disarrayed=tumble
Chemoreceptor
Detects certain chemical stimuli in the environment
Adaptation
A change in direction because it is too close to the where it is going or too far away
Pilus
Made of the protein pilin. It attaches to surfaces.
F-pilus
Attaches to other bacteria. It is the bigger and thicker line
Horizontal gene trannsfer (HGT)
Attaches to other bacteria- f-pilus
Twitching Motility
It pulls itself back and forth in a twitching motion with its small fimbriaes
Nanowire
Electron transfer between cells. Very thin pili
Polyhydroxybutyrate (PHB) Granules
Stores carbon
Polyphosphate (volutin) Granules
Stores Phosphate
Sulfur Granules
Sulfur can both be reduced and oxidized
Bacterial Microcompartments
Protein shell that encloses various enzymes. MCPs or BMC
