% Density guided simulations % Christian Blau % 2019-12-09 - Janssen # Treating cryo-EM data ## {data-background-image="pictures/emChallenges.svg" data-background-size="70%"} # Fitting structures to densities ## ![](pictures/old/input_density.png) ## ![](pictures/old/input_structure.png) ## ![](pictures/old/input_density_structure1.png) ## {data-background-video="movies/fitanimation.mp4" data-background-size="80%"} ## Simulation setup requirements - "vanilla" GROMACS simulation - add density in .mdp options - apply forces that increase similarity with density ## Exploring structural ensembles ## {data-background-video="movies/fitanimation_md.mp4" data-background-size="80%"} ## {data-background-video="movies/forced_fit.mp4" data-background-size="80%"} ## Choice of force-constant - determine balance between influence from force-field and from map ## {data-background-video="movies/fitanimation_md.mp4" data-background-size="80%"} ## {data-background-video="movies/forced_fit.mp4" data-background-size="80%"} # GLIC - avoiding model building ## ![](pictures/glic.png) ## ![](pictures/glic1.png) ## ![](pictures/glic2.png) ## ![](pictures/glic3.png) # Connecting structure and density ## {data-background-image="pictures/scattering.svg" data-background-size="80%"} ## {data-background-image="pictures/scattering-transp.svg" data-background-size="80%"} - EM densities report the number of electron-atom interactions per Volume ## Assumptions {#nobg} ![](pictures/old/scattering_2.svg) - Interaction is defined by interaction cross-section and motion of atoms ## {data-background-image="pictures/model.svg" data-background-size="80%"} ## {data-background-image="pictures/model1.svg" data-background-size="80%"} ## {data-background-image="pictures/model2.svg" data-background-size="80%"} ## {data-background-image="pictures/model3.svg" data-background-size="80%"} ## {data-background-image="pictures/Prob_gaus.svg" data-background-size="80%"} ## {data-background-image="pictures/Prob_poisx.svg" data-background-size="80%"} # Summary ## ![](pictures/densfit1.png) ## ![](pictures/densfit2.png) ## ![](pictures/densfit3.png) ## ![](pictures/template.png)