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PROTEIN PHYSICS LECTURE 12. Globular Fibrous H-bonds & hydrophobics Membrane ____.

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Presentation on theme: "PROTEIN PHYSICS LECTURE 12. Globular Fibrous H-bonds & hydrophobics Membrane ____."— Presentation transcript:

1 PROTEIN PHYSICS LECTURE 12

2 Globular Fibrous H-bonds & hydrophobics Membrane ____

3 membrane

4 Bacteriorodopsin with retinal Transport of protons H +

5 Porin Transport of polar molecules

6 Pore in membrane. Free energy of charge in the non-polar pore: ~ q 2 / [(  MEMBR  WATER ) 1/2 r PORE ] ~ ~ 20 kcal/mol / r PORE (Å) ~ 20 kcal/mol / r PORE (Å)

7 G-protein Slow decay of GTP = timer of action

8 Photo-syntheticcenter

9 Pigments in photo- syntheticcenter:Electrontransferchlorophyll   Light  Light

10 Tunneling P(X) ~ 10 -X(Å) T-independent Frequency of vibrations (attacks): f ~ /sec Successful attacks: f SUCCS. (x) ~ P(x)f, e.g.: f SUCCS. (5Å) ~ ~ ~ /sec ~ /sec Atom  1Å  Attenuation of electron density: electron density:


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