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showprobe

Elaine Meng

showprobe is an interactive program that allows visualization of theinteraction energy of a probe according to the grid calculated in chemgrid, using any graphics program that can display PDB format and color atoms according to their temperature factors. The user is interactively asked for the prefix name of the grid, the van der Waals type of the probe atom (an integer; see vdw.parms.amb in the parms subdirectory), the van der Waals parameter file (e.g., vdw.parms.amb), the point charge on the probe atom, the maximum (least favorable) energy for a point to be written out, the desired spacing of points in the output file, and the name of the output file. All of the grid files (chemgrid_file_prefix.bmp, chemgrid_file_prefix.esp, and chemgrid_file_prefix.vdw) are used; points that "bump" with receptor atoms or that have an interaction energy above the maximum specified are not written out. The output is in PDB format with interaction energies written in the temperature factor column, and TER cards separating the points.


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Curator: Daniel Gschwend, gschwend@cgl.ucsf.edu (rev. 1 September 1995)