Bacterial Structures.txt

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Anonymous
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223556
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Bacterial Structures.txt
Updated:
2013-06-12 10:35:20
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  1. Peptidoglycan?
    • Gives rigid support, protects against osmotic
    • pressure.
    • Sugar backbone with peptide side chains crosslinked
    • by transpeptidase.
  2. Cell wall/cell membrane (gram positives)?
    • Major surface antigen.
    • Pe ptidoglycan for support. Lipote ichoic acid
    • induces T F and IL-l.
  3. Outer membrane (gram negatives)?
    • Site of endotoxin (lipopolys accharide [LPS ]);major surface antigen.
    • Lipid A induces TNF and IL-l;
    • 0 polysaccharide is the antigen.
  4. Plasma membrane?
    • Site of oxidative and transport enzymes.
    • Lipoprotein bilayer.
  5. Ribosome?
    • Protein synthesis
    • 50S and 30S subunits.
  6. Periplasm?
    • Space between the cy topl asmic membrane and
    • outer membrane in gram-negative bacteria
    • Contains many hydrolytic enzymes, including
    • B-lactamases
  7. Capsule?
    • Protects against phagocytosis
    • Polysac charide (except Bacillus anthracis, which
    • conta ins D-glutamate) .
  8. Pilus/fimbria?
    • Mediate adherence of bacteria to cell surface ;
    • sex pilus for ms attachment between 2 bacteria
    • during conjugation.
    • Glycoprotein.
  9. Flagellum?
    • Motility
    • Protein.
  10. Spore?
    • Resistant to dehydration, heat, and chemicals.
    • Kerati n-like coat; dipicoli nic acid ;
    • peptidoglycan.
  11. Plasmid?
    • Contains a variety of genes for antibiotic
    • resistance, enzymes, and toxins.
    • DNA.
  12. Glycocalyx?
    • Mediates adherence to surfaces, especially
    • fore ign surfaces (e.g., indwelling catheters).
    • Polysaccharide.

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