Involved in autophagy . Regulates early events but also late events of autophagosome formation through direct interaction with Atg16L1 . Required for the formation of the autophagosome-like double-membrane structure that surrounds the Salmonella-containing vacuole (SCV) during S.typhimurium infection and subsequent xenophagy (By similarity). Involved in repair of DNA damage caused by ionizing radiation, which subsequently improves cell survival by decreasing apoptosis (By similarity). Inhibits PTK2/FAK1 and PTK2B/PYK2 kinase activity, affecting their downstream signaling pathways (, ). Plays a role as a modulator of TGF-beta-signaling by restricting substrate specificity of RNF111 (By similarity). Functions as a DNA-binding transcription factor . Is a potent regulator of the RB1 pathway through induction of RB1 expression . Plays a crucial role in muscular differentiation . Plays an indispensable role in fetal hematopoiesis and in the regulation of neuronal homeostasis (By similarity).
Subcellular locations: Nucleus, Cytoplasm, Cytoplasm, Cytosol, Preautophagosomal structure, Lysosome
Under starvation conditions, is localized to puncate structures primarily representing the isolation membrane that sequesters a portion of the cytoplasm resulting in the formation of an autophagosome.
Expression levels correlated closely with those of RB1 in cancer cell lines as well as in various normal human tissues. Abundantly expressed in human musculoskeletal and cultured osteosarcoma cells.