Archea Flashcards
In which habitats do archea live?
Extreme habitats ( eg halophile, thermophile,acidophile..)
What are the 2 features of archeal plasmamembrane?
The presence of isoprene units in hydrocarbons chain and the ether bond between glycerol and fatty acids
What is the type of lipid in extreme thermophiles ?
Diglycerol tetraether lipids
What is missing in archeal cell wall?
Peptidoglycans
What structures can be above S layer in archea?
Protein sheat and polysaccharide layer ( methanochondroitin)
What are the differences between murein and pseudomurein? (3)
1) B-1,3 bond
2) N-acetylalosaminuronic acid in place of NAM
3) L- aminoacids in cross link in place of D aminoacids
What’s in the thermophylic archea nucleoid?
Histones to prevent DNA denaturation
What are the external structure of archea?
Pili, cannulae and hami
How is energy given to archeal flagella to allow their movement? How in bacteria?
In archea is given by ATP in bacteria from proton motive force
Rifampicin targets which structure? Is it effective in archea?
It targets bacterial polymerase, it’s not effective in archea
Are there runs and tumbled in archea movement?
No, because when rotation switches archea move only in forward and reverse direction
What’s the starting aminoacid in bacteria translation? Is it the same in archea?
It’s formylmethionine. It’s not the same in archea as there it is methionine
What constitutes the S layer?
Proteins or glycoproteins
