Brother asking share in mother's property where mother is still alive

Hello, Thanks in advance for considering the query. My mother has an house property in her name which was purchased 15 years ago by my father in my mother's name. Now we are 2 brother. My elder brother is living separately from 2 years. Now he wants to claim his share in property. My question is 1) If my mother transfer the property in my name by registered gift deed, will my brother be able to make any valid claim on property in future. 2) Till my mother is alive, can he make any lawful claim of his share in property from my mother. (if property not tfd in my name) Thanks for your precious consideration.