Lecture 1B: Introduction to Microbial Physiology and Prokaryotic Cell Structures Flashcards
(43 cards)
Flagella is present in
Bacteria
Flagella counter part of archea
Archaella
structure that assists in swimming in Bacteria and Archaea
Flagella/archaella
Size of Flagellar and Flagellation
long, thin appendages (15–20 nm wide)
Different arrangements of Flagellar and Flagellation
polar
lophotrichous
amphitrichous
peritrichous
increase or decrease rotational speed relative to strength of proton motive force
Flagellar and flagellation
Shape of flagellar structure
Helical shape
Component of Filament
flagellin
Structures of flagella
- L-ring
- P-ring
- MS ring
- C-ring
attaches/stabilizes the flagellum
- close to the hook
- on the Lipid part
L-ring
Secures the rest of basal body (rod) on the Periplasmic place or peptidoglycan
P-ring
Hold together all of the components
- there are Fli proteins
- close to membrane
MS ring
Flagellar synthesis, which structure is created first on flagellum?
MS ring
Growth of flagellum tip is ___ grows from ___
Filament grows from tip
The domain organization of selected histidine- aspartate-phosphorelay systems
Osmolarity sensing
Oxygen sensing
Chemosensory
Sporulation regulation
The EnvZ/OmpR pathway of Escherichia coli, which is involved in regulating the expression of the two outermembrane porins ___ and ___.
OmpF and OmpC.
what does Osmolarity sensing promote?
Transcription
What does ArcB and ArcB system result to?
Transcription
What does CheA and CheB produce?
Receptor adaptaion
if CheY rather than CheB motility
Major proteins in chemosensory system of E. coli
- Chemoreceptors
- PBP (Periplasmic binding protein)
- Chemotaxis proteins
- Response regulator
The chemoreceptors in Chemosensory system of E. coli
methyl-accepting chemotaxis
proteins (MCPs)
Chemotaxis protein in Chemosensry system of E. coli
(Che)W monomers, CheA dimer
Response regulator of chemosensory system of E. coli
CheY
When there is a decrease in attractant conc. it will induce ____
Autophosphorylation of Che dimer
