After signature of property registration, cancel it or not?

Sir, iam signing in documents on for registration of property give to my brother bcoz of some pressures on property settlement time.. property registered in 2015, it's my father's self acquired property.. i have 1 married sister also, she is not signed on document registration time, she is any rights for getting share on that property? (she was born in 1964, now she died 2016) but my sister daughter is my wife(iam married with her).. if any chance to get that property share from my side? or my wife side? I want get back my share.. plz understand my question and reply plZ