Difference between proto-oncogenes and tumor supressor genes

[Swede]

What is the difference between proto-oncogenes and tumor supressor genes?

I know that proto-oncogenes when injured or mutated generate oncogenes, whose synthesized proteins lead to neoplasi in different ways. But isn't that the case also for tumor supressor genes? I really don't get the difference.

[david23]

actually you know what, why dont you tell me what you think the difference between the 2 is

[Darby]

There is some overlap - a tumor suppressor could be a proto-oncogene.

But not necessarily, and that's the focus of your question. Where do the terms not overlap?