Lecture 6: Proteins and Transport

Chapters 3/5

 

Topics

Reading

 1

 Protein Structure

 64-72

 

Primary Structure (linear sequence)

  • peptide bond (p 68)

Secondary Structure

    • alpha helix (p68, 70)
    • beta sheet (p 69, 70)
    • beta turn

Tertiary Structure (p 69 - 72)

    • hydrogen bonding
    • hydrophobic interaction
    • ionic interactions
    • covalent bonds (disulfide bridges p 69)
 

 2

 Transport across a Membrane 
 
  • Membrane Proteins (p 118 - 121)
    • integral
      • transmembrane pores
    • peripheral
  • Mechanisms of membrane transport (p 121 - 132)
    • Passive diffussion (down concentration gradient)
    • Active transport (against gradient requiring energy)
 

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