$ sudo apt-get remove pdb2pqr 

Uninstall pdb2pqr including dependent package

If you would like to remove pdb2pqr and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove pdb2pqr 

Use Purging pdb2pqr

If you use with purge options to pdb2pqr package all the configuration and dependent packages will be removed.

$ sudo apt-get purge pdb2pqr 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove pdb2pqr 

See Also,