Hello
Your father acquired properties in addition to ancestral property. The children have a share in the property unless the father Makes a will and deprives them of the same.in your case your father died without making a will and therefore the property belongs to you as well as all your siblings and your mother.
You have stated that all the property is in your brothers name. How can this be possible when your father died without making a will.
Now the property belongs to you,your 2 brothers and 3 sisters.
If the sisters have died then their heirs, children have a share.
Also the your uncle and their chuldren have a share in the ancestral property which your father had.
You have an equal share in the self acquired property of your father.
Regards