Dear All,

Help, I don't know what I am doing wrong. I want to load a dimer into pymol, 3GRS, the standard PDF file from the PDB bank only gives co-ordinates for a monomer but if I download the PDB file for the biological unit http://www.rcsb.org/pdb/cgi/explore.cgi?job=download&pdbId=3GRS&page=0&pid=1521064246710

ftp://ftp.rcsb.org/pub/pdb/data/biounit/coordinates/divided/gr/3grs.pdb1.gz

If I load 3grs.pdb1 into pymol it still only shows a monomer.

If I edit out "ENDMDL" after the co-ordinates for the first monomer , pymol will then show a dimer with sidechains or sticks but if I try to draw a cartoon it messes up and draws the ribbons ect all wrong.

I tried to also change all the A's in the second set of co-ordinates to B's indicating subunit B but still it does not work.

Is there a program I can use that will fix my pdb files downloaded from pdb bank into correct format for pymol?

Also, once I get the dimer loaded properly I want to colour each of the four domains. How will I do that?

Mac OS X 10.2.6 / x11 0.3 / pymol-0_90-bin-osx.dmg

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