Prokaryotic Cell Structure and Function

Click here to load reader

download Prokaryotic Cell Structure and Function

of 12

  • date post

    16-Jan-2016
  • Category

    Documents

  • view

    25
  • download

    1

Embed Size (px)

description

Prokaryotic Cell Structure and Function. Size of Bacteria. Average bacteria 0.5 - 2.0 um in diam. RBC is 7.5 um in diam. Pulopiscium fishelsoni , bacillus (80µm in diameter and 200-600 µm long) Thiomargarita namibiensis , sperical (100-750 µm in diameter.). Shapes of Bacteria. Coccus - PowerPoint PPT Presentation

Transcript of Prokaryotic Cell Structure and Function

  • Prokaryotic Cell Structure and Function

  • Size of BacteriaAverage bacteria 0.5 - 2.0 um in diam.

    RBC is 7.5 um in diam.Pulopiscium fishelsoni, bacillus (80m in diameter and 200-600 m long)Thiomargarita namibiensis, sperical (100-750 m in diameter.)

  • Shapes of Bacteria

    CoccusBacillusCoccobacillusVibrioSpirillumSpirochete

  • Spherical BacteriaAn average coccus is about 0.5-1.0 micrometer (m) in diameter.

    A. Division in one plane.

    Diplococcus: cocci arranged in pairs

    Streptococcus: cocci arranged in chainsStreptococcus pneumoniae,

    Streptococcus pyogenes,

  • Spherical BacteriaB. Division in two planes.

    tetrad: cocci arranged in squares of 4 C. Division in three planes Sarcina: cocci in arranged cubes of 8 sarcina

  • Spherical BacteriaD. Division in random planes

    Staphylococcus: cocci arranged in irregular, often grape-like clusters

  • Rod-Shaped BacteriaDiplobacillusCoccobacillusStreptobacillus

  • Spiral-Shaped BacteriaSpirocheteSpirillum

  • Cell StructuresCell Membrane

    Cytoplasm

    Cell Wall

    Components external to cell wall Flagella PiliCapsule/ Slime layer

  • Cell MembraneHydrophobic Proteins

    Bilayer Phospholipid Triclosan-enoyl transferase

    Hopanoids

  • Membrane proteinsStructural supportDetection of environmental signalsToxR- Vibrio cholera Secretion of virulence factor and communication signalsNodI and NodJ-Rhizobia

  • Membrane lipidsPhosphoryl headsNegative-phosphatidatePhosphatidylglycerolCardiolipinPositive-PhosphatidylethanolamineDNA interactiontransporter protein

    Fatty acidsSaturated straight chain (6-22) Unsaturated Oleic acid (cis)Cyclopropane