That is only marginally related to Konsole.
If the shell is bash, it will read profile only when being invoked as a login shell.
By default the shell invoked from Konsole is a normal shell.
You can either source /etc/profile in your .bashrc, write the settings into .bashrc or /etc/bash.bashrc or modify the shell session entry of konsole so that is starts a login shell (man bash)
Cheers,
_