Anti-CtBP1 Antibody Picoband®

CTBP1, C-terminal-binding protein 1, is a protein that in humans is encoded by the CTBP1 gene. The CtBP1 protein binds to the C-terminus of adenovirus E1A proteins. This gene is mapped to 4p16.This phosphoprotein is a transcriptional repressor (corepressor) and may play a role during cellular proliferation. This protein and the product of a second closely related gene, CTBP2, can dimerize. CtBP1 and CtBP2 preferentially associate with the E1A via a 5 amino acid motif, PLDLS, to repress E1A induced oncogenesis and cellular transformation. CtBP1 is expressed from embryo to adult, but CtBP2 is mainly expressed during embryogenesis. During skeletal and T cell development, CtBP1 and CtBP2 associate with the PLDLSL domain of δEF1, a cellular zinc finger-homeodomain protein, and thereby enhances δEF1-induced transcriptional silencing. In addition, CtBP complexes with CtIP, a 125 kDa protein that recognizes distinctly different protein motifs from CtBP. CtIP binds to the BRCT repeats within the breast cancer gene BRCA1 and enables CtBP to influence BRCA1 activity. Both proteins can also interact with a polycomb group protein complex which participates in regulation of gene expression during development. Alternative splicing of transcripts from this gene results in multiple transcript variants.

A synthetic peptide corresponding to a sequence at the C-terminus of human CtBP1, different from the related mouse sequence by one amino acid, and from the related rat sequence by two amino acids.

Cancer, Cell Biology, Cell Cycle, Cell Cycle Inhibitors, Co-Factors, Epigenetics and Nuclear Signaling, Host-Virus Interaction, Interspecies Interaction, Microbiology, Transcription

Corepressor targeting diverse transcription regulators such as GLIS2 or BCL6. Has dehydrogenase activity. Involved in controlling the equilibrium between tubular and stacked structures in the Golgi complex. Functions in brown adipose tissue (BAT) differentiation. .

1. Furusawa, T., Moribe, H., Kondoh, H., Higashi, Y.Identification of CtBP1 and CtBP2 as corepressors of zinc finger-homeodomain factor delta-EF1.Molec. Cell. Biol. 19: 8581-8590, 1999. 2. Sewalt, R. G. A. B., Gunster, M. J., van der Vlag, J., Satijn, D. P. E., Otte, A. P.C-terminal binding protein is a transcriptional repressor that interacts with a specific class of vertebrate polycomb proteins.Molec. Cell. Biol. 19: 777-787, 1999.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.