RB1CC1 and breast cancer: FIP200 (also known as RB1-inducible Coiled-Coil 1, RB1CC1) was first reported as a regulator of the retinoblastoma (RB) protein [15], identified as a tumor suppressor in human breast cancer [16,17], and recently rediscovered as a mammalian counterpart of Atg17 in the yeast Atg1-Atg13-Atg17 complex [18].