For molecular docking of an organic compound with Bacillus megaterium which protein should choose?

Because the organic compund was tested its antimicrobial activity with "Bacillus megaterium" on Kirby-Buyer disc diffusion method.

When searching for the protein structure of "Bacillus megaterium" in RCSB PDB database, exactly it can't find "Bacillus megaterium " in this case which protein should take for molecular docking?

I have attached a screenshot of my search result of RCSB PDB website.