The BIN1 protein, which is encoded by the BIN1 gene, belongs to Myc-interacting protein family which is one of the nucleocytoplasmic adaptor proteins. The BIN1 protein can interact with the functionally critically Myc-box region at the N-terminal of the Myc oncoprotein, with a feature of tumor suppressor. Myc family proteins promote proliferation, growth, and apoptosis and, when deregulated, are profoundly involved in the genesis of an extraordinarily wide range of cancers. Although BIN1 is expressed in many normal cells, its levels were greatly reduced or undetectable in 14/27 carcinoma cell lines and 3/6 primary breast tumours. Deficits were functionally Although BIN1 is expressed in many normal cells, its levels were greatly reduced or undetectable in 14/27 carcinoma cell lines and 3/6 primary breast tumours. Deficits were functionally significant because ectopic expression of BIN1 inhibited the growth of tumour cells lacking endogenous message. We conclude that BIN1 is an MYC-interacting protein with features of a tumour suppressor.
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