In the world, breast cancer is the fifth most common cause of cancer death. In 2005, breast cancer caused 502,000 deaths (7% of cancer deaths; almost 1% of all deaths) in the world. Among all women in the world, breast cancer is the most common cancer. In this project we model the protein target for breast cancer and design the de novo drug which can be subjected to testing protocols by Clinical Pharmacology departments which would be of immense benefit in the treatment of cancer. Hence by way of our project we model the protein target and the designed drugs act as potential therapeutic agents for Clinical Oncological and Pharmacoinformatics studies.