Abstract
CEBPB Location 20q13 Protein DNA-binding protein. CCAAT enhancer-binding protein (CEBP) transcription factors are a family of 6 multifunctional basic leucine zipper (bZIP) transcription factors. The 5 other CEBPs are: CEBPA (19q13), CEBPD (8q11), CEBPE (8q11), CEBPG (19q13), all four equally implicated in leukemias, and DDIT3/CHOP/CEBP zeta (12q13), so far known to be involved in solid tumours (liposarcoma). These transcription factors play a key role in cellular differentiation, in particular in the control of myeloid differentiation. CEBPB is composed of a N-term transactivation domain, a negative regulatory domain, a DNA-binding basic motif, and a leucine-zipper domain in C-term. Different isoforms (LAP: liver activating protein, and LIP: liver inhibitory protein). CEBPB suppresses cell proliferation through repression of E2F target genes; on the other hand, CEBPB may promote tumorization of epithelial cells (Ramji et al., 2002; Nerlov et al., 2007).
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