Transcription factor that binds to sequence with multiple copies of 5'-TTC[CG]G-3' present in its own promoter and that of the HNRPA2B1 gene. Down-regulates transcription of these genes. Binds to the retinoic acid response element (RARE) 5'-AGGGTTCACCGAAAGTTCA-3'. Activates the proenkephalin gene independently of promoter binding, probably through protein-protein interaction. When secreted, behaves as an inhibitor of cell proliferation, by arresting cells in the G0 or G1 phase. Required for neural tube closure and skeletal patterning. Regulates epithelial cell proliferation and side-branching in the mammary gland. Controls the expression of peripheral tissue antigens in pancreatic lymph nodes. Isoform 1 displays greater transcriptional activity than isoform 4. Isoform 4 may inhibit transcriptional activity of isoform 1 by interacting with isoform 1 and retaining it in the cytoplasm. Transcriptional activator of EIF4G3. Homodimer. Isoform 1 and isoform 4 may form a heterodimer. Interacts with LMO2 and CLIM2 (By similarity). Interacts with LMO4; LMO4 blocks export from nucleus (By similarity). May interact with the corepressors NCOR1 and NCRO2. Identified in a complex with the XRCC5 and XRCC6 heterodimer. Interacts (via the SAND domain) with the DNA-PK complex subunit XRCC6; the interaction is direct and may be inhibited by DNA-binding. Cytoplasmic in non-mucinous colorectal carcinoma. When expressed alone, localized almost exclusively in the nucleus but, when expressed with isoform 4, nuclear expression decreases to 32% and cytoplasmic expression increases by 270%. Secreted in some cell types. Secreted in some cell types. When expressed alone, localizes mainly in the cytoplasm but, when expressed with isoform 1, nuclear localization is enhanced. Expressed in various tissues and cells such as in peripheral mononuclear cells and hormone-secreting pituitary cells. Expression in pancreatic lymph nodes of patients with type 1 diabetes is 20 times higher than in healthy controls. Highly expressed in fetal and adult brain. May be phosphorylated by DNA-PK complex in a DNA independent manner (in vitro). The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. Defective DEAF1 could confer a growth advantage to the mutated cells influencing the development and progression of neoplasia, e.g. in the case of colorectal carcinomas. Subcellular location in colorectal carcinomas (cytoplasmic or nuclear) is a prognostic factor that identifies a subgroup of patients with reduced survival. In addition, changes in the subcellular location correlates with the proliferative status of the cells. Has no predictable signal peptide. This protein was first known as suppressin (characterized in bovine neuroendocrine and immune cells). However, according to PubMed:9773984, it is uncertain whether it corresponds really to the suppressin also described in Ref.4. DEAF1 has been described as a nuclear dimeric protein and suppressin as a secreted monomeric protein. Several sequencing errors.