CTBP1 cDNA Clone – C-Terminal Binding Protein 1 (Human)

This gene encodes a protein that binds to the C-terminus of adenovirus E1A proteins. This phosphoprotein is a transcriptional repressor and may play a role during cellular proliferation. This protein and the product of a second closely related gene, CTBP2, can dimerize. 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. [provided by RefSeq, Jul 2008]

CTBP1: Involved in controlling the equilibrium between tubular and stacked structures in the Golgi complex. Functions in brown adipose tissue (BAT) differentiation. Corepressor targeting diverse transcription regulators such as GLIS2. Has dehydrogenase activity. Homo- or heterodimer. Heterodimer with CTBP2. Interacts with PRDM16; the interaction represses white adipose tissue (WAT)- specific genes expression. Interacts with GLIS2, FOXP2, HDAC4, HDAC5, HDAC9 and ZNF217. Interacts with adenovirus E1A protein (via its C-terminus); the interaction disrupts the interaction of CTBP1 with RBBP8. Interacts with Epstein-Barr virus EBNA3 and EBNA6. Interacts with ELK3 (via its PXDLS motif). Interacts with RBBP8 (via its PXDLS motif); the interaction is disrupted by binding to adenovirus E1A. Interacts with FOXP1, HIPK2, PNN, NRIP1, MECOM, ZNF366, ZFHX1B and WIZ. Interaction with SATB1 (non-acetylated form); the interaction stabilizes its attachment to DNA and promotes transcription repression. Belongs to the D-isomer specific 2-hydroxyacid dehydrogenase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Nuclear receptor co-regulator; EC 1.1.1.-; Oxidoreductase; Transcription, coactivator/corepressor; Cell cycle regulation

Chromosomal Location of Human Ortholog: 4p16

Cellular Component: nucleoplasm; nucleus; transcriptional repressor complex

Molecular Function: NAD binding; protein binding; protein C-terminus binding; protein domain specific binding; protein homodimerization activity; transcription factor binding

Biological Process: negative regulation of cell proliferation; negative regulation of histone acetylation; negative regulation of transcription from RNA polymerase II promoter; negative regulation of transcription, DNA-dependent; positive regulation of histone deacetylation; protein amino acid phosphorylation; regulation of cell cycle; viral genome replication; white fat cell differentiation

Disease: Wolf-hirschhorn Syndrome