User roles – enable custom posts disable posts

Hello,

Im just wondering if its possible to create user role that allows to write/edit custom post type for example: Consultants, but not allow to write normal posts (used for as news for example).

I know that if user wants to edit posts its a must to have edit_post enabled for him. Question is if i can create something like: edit_[custom_post_type] or something?

Thanks in avance if anyone can help me with this issue…

Kindest regards