proteins are „3d jigsaw-puzzles“ · 2012. 4. 26. · solvent with ionic strength i (high e)...
TRANSCRIPT
Proteins are „3D Jigsaw-Puzzles“
Hydrogen Bonds in BPTI
Hydrogen Bonds in BPTI
Protein continuum electrostatics
X-Ray Crystallography
various protein crystal forms
X-Ray Crystallography
experimental setup
typical diffraction pattern
Electron density from x-ray
One single atom
real space
Fourier space
phase
Electron density from x-ray
One single atom - shifted
real space
Fourier space
phase
Electron density from x-ray
Two atoms
real space
Fourier space
phase
Electron density from x-ray
One “molecule“
real space
Fourier space
phase
Electron density from x-ray
3 x 3 unit cells
real space
Fourier space
phase
Electron density from x-ray
5 x 5 unit cells
real space
Fourier space
phase
Electron density from x-ray
10 x 10 unit cells
real space
Fourier space
phase
X-Ray Crystallography
Levels of resolution
Effect of temperature
BPTI: Molecular Dynamics (300K)
A model of Bacteriorhodopsin
BR photocycle
t [ps]
C13 – C14
C14 – C15
13-14
14-15
NH
H N
Prot.
hν
W. Zinth et. al.
Time-resolved Pump-Probe Spectrum of Sensorhodopsin
W. Zinth et. al.
BR J
J K
hν