DDIT3 / CHOP Antibody – Mouse Monoclonal

This gene encodes a member of the CCAAT/enhancer-binding protein (C/EBP) family of transcription factors. The protein functions as a dominant-negative inhibitor by forming heterodimers with other C/EBP members, such as C/EBP and LAP (liver activator protein), and preventing their DNA binding activity. The protein is implicated in adipogenesis and erythropoiesis, is activated by endoplasmic reticulum stress, and promotes apoptosis. Fusion of this gene and FUS on chromosome 16 or EWSR1 on chromosome 22 induced by translocation generates chimeric proteins in myxoid liposarcomas or Ewing sarcoma. Multiple alternatively spliced transcript variants encoding two isoforms with different length have been identified. [provided by RefSeq, Aug 2010]

CHOP: a transcriptional-regulatory protein of the bZIP family. Inhibits the DNA-binding activity of C/EBP and LAP by forming heterodimers that cannot bind DNA. May play an important role in melanoma progression. CK2-mediated phosphorylation inhibits its transcriptional activity. Up-regulates IL-6 transcription by trapping negative regulating NF-IL6 isoform.

Protein type: Oncoprotein; DNA-binding; Autophagy; Transcription factor

Chromosomal Location of Human Ortholog: 12q13.1-q13.2

Cellular Component: cytosol; late endosome; nucleoplasm; nucleus

Molecular Function: cAMP response element binding protein binding; DNA binding; leucine zipper domain binding; protein binding; protein heterodimerization activity; protein homodimerization activity; transcription corepressor activity; transcription factor activity; transcription factor binding

Biological Process: aging; blood vessel maturation; cell cycle arrest; cell redox homeostasis; cellular protein metabolic process; embryonic organ development; ER overload response; inhibition of CREB transcription factor; mRNA transcription from RNA polymerase II promoter; negative regulation of fat cell differentiation; negative regulation of myoblast differentiation; negative regulation of protein kinase B signaling cascade; negative regulation of transcription factor activity; negative regulation of transcription from RNA polymerase II promoter; negative regulation of transcription, DNA-dependent; positive regulation of interleukin-8 production; positive regulation of neuron apoptosis; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; proteasomal ubiquitin-dependent protein catabolic process; regulation of transcription in response to stress; regulation of transcription, DNA-dependent; release of sequestered calcium ion into cytosol; response to amphetamine; response to DNA damage stimulus; response to drug; response to hydrogen peroxide; response to nutrient; response to starvation; response to unfolded protein; unfolded protein response; Wnt receptor signaling pathway

Disease: Myxoid Liposarcoma