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role: info, structural (RNA), catalytic (RNA)
location: genome, plasmids, ribosomes, cytoplasm
role: structural, energy storage
location: peptidoglycan, outer membrane, storage granules
bacterial cytoplasmic membrane
lipid bilayer-seperates in form out
structure- glycerol core, 2 carbons form ether links to hydrophobic f.a.
3rd carbon- links to hydrophilic phosphate head
cytoplasmic membrane proteins
Integral-mem channels, transporters, energy, metabolism, chemotaxis
Secreted- transported through membrane
Peripheral- mem anchor, similiar to integral, lipoprotein with anchor
Ether betwen glycerol and hydrophobic side chain. not ESTER
isoprene as subunit for hydrophobic side chains rather than fatty acids
increase rate of uptake across cytoplasmic membrane of solutes with low permeability
Passive- no energy needed. aquaporins
Active- requires energy. simple transporters, group translocation, ABC transporter
ATP binding Cassette
3 parts- periplasmic binding protein, membrane spanning transporter, atp-hydrolyzing protein
secretion of proteins
can include: toxins, enzymes for degradation of large polymers (cellulose), and enzymes or recomponents for construction of cell structures outside cytoplasm
"cell walls" of bacteria
aka peptidoglycan layer
prevents osmotic lysis, gives cell shape, located outside cytoplasmic membrane
bind to and inactivates transpeptidases
which are responsible for forming oligopeptide cross links in peptidoglycan
yields weakened cell wall and lysis
glycan= long polysaccharide made of 2 amino sugars linked B-1,4
peptido- made by oligopeptide cross links. made partly of d-amino acids
gram postive cell surface
2 phyla= firmicutes, actinobacteria
teichoic acid- acidic polymer of modified ribitol
gram negative cell surface
contains LPS layer
contains porins (3 channeled passive transporters)
space between membranes- periplasm
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