Is it possible to draw the "border" between Europe and Asia? I am using pscoast and -JQ

Is it possible to draw the “border” between Europe and Asia? I am using pscoast and -JQ

Pscoast only have the borders of countries and the first internal division of nine countries (like Russia).
So it would not be a trivial thing to do (if it were even possible).

I think I will use a fat pen on the GMT map. Thanks for the advice.