[PyMOL] ExecutivesSymexp-Error: No Symmetry loaded!

[leila k. <kar...@gm...>]

Dear PYMOL users,

I have done a homology modelling using swiss model. Template pdb file
contain 3 chains (A, B, C). I used only chain A for homology modelling as
template.

There is a symmetry operator in template pdb file (temp.pdb). I want to use
symexp to obtain dimeric structure for modeled pdb file (model.pdb).

I manually added following records (from temp.pdb) at the first of the
modeled pdb file:
===========================================================
REMARK 290
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1
REMARK 290
REMARK 290      SYMOP   SYMMETRY
REMARK 290     NNNMMM   OPERATOR
REMARK 290       1555   X,Y,Z
REMARK 290       2555   -X,Y,-Z
REMARK 290       3555   X+1/2,Y+1/2,Z
REMARK 290       4555   -X+1/2,Y+1/2,-Z
REMARK 290
REMARK 290     WHERE NNN -> OPERATOR NUMBER
REMARK 290           MMM -> TRANSLATION VECTOR
REMARK 290
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY
REMARK 290 RELATED MOLECULES.
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000        0.00000
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000
REMARK 290   SMTRY1   3  1.000000  0.000000  0.000000       88.99000
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       28.29500
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       88.99000
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       28.29500
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000
REMARK 290
CRYST1  177.980   56.590   83.220  90.00 116.58  90.00 C 1 2 1      12
ORIGX1      1.000000  0.000000  0.000000        0.00000
ORIGX2      0.000000  1.000000  0.000000        0.00000
ORIGX3      0.000000  0.000000  1.000000        0.00000
SCALE1      0.005619  0.000000  0.002811        0.00000
SCALE2      0.000000  0.017671  0.000000        0.00000
SCALE3      0.000000  0.000000  0.013436        0.00000

===========================================================

After using symexp sym,model,(model),1 in command line, I encountered with:

ExecutivesSymexp-Error: No Symmetry loaded!

temp.pdb and model.pdb files are in following links:

https://www.dropbox.com/s/t8m1nrkx2s69wi9/model.pdb?dl=0

https://www.dropbox.com/s/mt7toc0wtenr779/temp.pdb?dl=0

Any help will be highly appreciated.

Best,
Leila