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TORC3 Transcriptional coactivator for CREB1 which activates transcription through both consensus and variant cAMP response element (CRE) sites. Acts as a coactivator, in the SIK/TORC signaling pathway, being active when dephosphorylated and acts independently of CREB1 'Ser-133' phosphorylation. Enhances the interaction of CREB1 with TAF4. Regulates the expression of specific CREB-activated genes such as the steroidogenic gene, StAR. Potent coactivator of PPARGC1A and inducer of mitochondrial biogenesis in muscle cells. Also coactivator for TAX activation of the human T-cell leukemia virus type 1 (HTLV-1) long terminal repeats (LTR). Binding, as a tetramer, through its N-terminal region, with the bZIP domain of CREB1 enhances recruitment of TAF4 to the promoter. 'Arg-314' in the bZIP domain of CREB1 is essential for this interaction. Interaction with HTLV-1 TAX enhances its transcriptional activity. Interacts, via the N- terminal with the ankyrin repeats of BCL3, to form a complex with CREB1 on CRE and TxRE responsive elements and represses HTLV-1 LTR-mediated transcription. Predominantly expressed in B and T lymphocytes. Highest levels in lung. Also expressed in brain, colon, heart, kidney, ovary, and prostate. Weak expression in liver, pancreas, muscle, small intestine, spleen and stomach. Belongs to the TORC family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Transcription, coactivator/corepressor
Chromosomal Location of Human Ortholog: 15q26.1
Cellular Component: cytoplasm; cytosol; nucleoplasm; nucleus
Molecular Function: cAMP response element binding protein binding
Biological Process: macrophage activation; negative regulation of lipid catabolic process; positive regulation of CREB transcription factor activity; positive regulation of transcription from RNA polymerase II promoter; protein homotetramerization; transcription, DNA-dependent; viral process
Reference #:  Q6UUV7 (UniProtKB)
Alt. Names/Synonyms: CREB regulated transcription coactivator 3; CREB-regulated transcription coactivator 3; CRTC3; FLJ21868; TORC-3; TORC3; Transducer of CREB protein 3; transducer of regulated cAMP response element-binding protein (CREB) 3; Transducer of regulated cAMP response element-binding protein 3; transducer of regulated CREB protein 3
Gene Symbols: CRTC3
Molecular weight: 66,959 Da
Basal Isoelectric point: 6.35  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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