Last updated 20201211.
CHIMERA: Generating Biomt matrices from a volume
1. Assuming pdb is object #0 and map is #1.
2. Open the chimera command line (Tools -> General Controls -> Command Line). This should appear as a white box at the bottom of your chimera screen.
3. In the command line box, type the following:
measure symmetry #1
////A description of the inferred symmetry and origin will be displayed at the bottom of the screen...check that this is sensible before proceeding!\\\\
sym #0 group #1
////Creates entire symmetric particle...hopefully!\\\\
4. Save your original monomeric particle. The pdb should contain the new biomt matrices in the header. Remember to save relative to your input volume (#1)!
File-> Save PDB...
Credit to Max to figuring this out! Tried and tested on icosahedral viruses.
CHIMERAX Colouring
Creadit to Pranav for a lot of this one!
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Cool colour palettes...
https://rdrr.io/cran/RColorBrewer/man/ColorBrewer.html
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#setup the environment
open relion_locres.mrc
open relion_locres_filtered.mrc
volume originIndex 224,224,224
open m135_181002a_boxmap.map
open m135_181002a_wholevirus.map
view
view orient
#color surface of map by radius
vol #1-3 hide
color radial #4 palette 100,red:120,yellow:130,green:150,cyan:165,blue
clip far 125
set silhouettes true
volume #4 sdLevel 3.2 step 1
save surface_overview_sdLvl3.2_radial.png width 1200 height 1200
supersample 3 transparentBackground true
volume #4 sdLevel 7.1 step 1
save surface_overview_sdLvl7.1_radial.png width 1200 height 1200
supersample 3 transparentBackground true
#colour surface by local resolution
vol #4 hide
vol #2 show
volume #2 sdLevel 6.0 step 1
colordef locres_blue 0.44,0.123,0.182
colordef locres_lt_blue 0.171,0.217,0.233
colordef locres_yellow 0.255,0.255,0.191
colordef locres_orange 0.253,0.174,0.97
colordef locres_red 0.215,0.25,0.28
#color sample #2 map #1 offset 0 palette
locres_blue:locres_lt_blue:locres_yellow:loces_orange:locres_red range
full
color sample #2 map #1 offset 0 palette "dodger blue:sky
blue:khaki:coral:firebrick" range full
save surface_colored_by_locreso.png width 1200 height 1200
supersample 3 transparentBackground true