Task 9: Normal Mode Analysis
There are several forces acting within a protein. Most of these forces have one or more equilibrium states. In reality the protein is flexible. That means, that the atoms of the system swing around these equilibrium states. These swinging around the equilibrium states can be approximated by the harmonic approximation. The forces can then be replaced by a less complex system of springs. With this model it is possible to calculate large motions of the protein by Normal Mode Analysis.
In opposite to Molecular Dynamics this is very fast and it is not a simulation it is a calculation of possible simple and large motions.
In this task we want to try several servers, which calculate normal mode analysis. A detailed description of the task can be found here. For most runs we used the structure 1J8U for our protein PAH. In the case of the all-atom NMA we used a smaller protein to test the server and this kind of approach.
Der server WEBnm@ uses only the C-alpha atoms to calculate the normal modes.
Plots of atomic displacement
Visualization of Normal Modes