TCF3

This gene encodes a member of the E protein (class I) family of helix-loop-helix transcription factors. E proteins activate transcription by binding to regulatory E-box sequences on target genes as heterodimers or homodimers, and are inhibited by heterodimerization with inhibitor of DNA-binding (class IV) helix-loop-helix proteins. E proteins play a critical role in lymphopoiesis, and the encoded protein is required for B and T lymphocyte development. Deletion of this gene or diminished activity of the encoded protein may play a role in lymphoid malignancies. This gene is also involved in several chromosomal translocations that are associated with lymphoid malignancies including pre-B-cell acute lymphoblastic leukemia (t(1;19), with PBX1), childhood leukemia (t(19;19), with TFPT) and acute leukemia (t(12;19), with ZNF384). Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene, and a pseudogene of this gene is located on the short arm of chromosome 9. [provided by RefSeq, Sep 2011]

TCF3 Transcription Factor 3

Transcriptional regulator involved in the initiation of neuronal differentiation and mesenchymal to epithelial transition (By similarity).
Heterodimers between TCF3 and tissue-specific basic helix-loop-helix (bHLH) proteins play major roles in determining tissue-specific cell fate during embryogenesis, like muscle or early B-cell differentiation (By similarity).
Together with TCF15, required for the mesenchymal to epithelial transition (By similarity).
Dimers bind DNA on E-box motifs: 5'-CANNTG-3' (By similarity).
Binds to the kappa-E2 site in the kappa immunoglobulin gene enhancer (PubMed:2493990).
Binds to IEB1 and IEB2, which are short DNA sequences in the insulin gene transcription control region (By similarity).
Isoform E47
Facilitates ATOH7 binding to DNA at the consensus sequence 5'-CAGGTG-3', and positively regulates transcriptional activity.

Biological Process B cell differentiationNAS:UniProtKB1 Publication
Biological Process B cell lineage commitmentIDA:UniProtKB1 Publication
Biological Process immunoglobulin V(D)J recombinationIDA:MGI1 Publication
Biological Process negative regulation of transcription by RNA polymerase IIIDA:NTNU_SB1 Publication
Biological Process nervous system developmentIEA:UniProtKB-KW
Biological Process positive regulation of B cell proliferationIMP:UniProtKB
Biological Process positive regulation of cell cycleIDA:UniProtKB
Biological Process positive regulation of DNA-binding transcription factor activityIDA:UniProtKB1 Publication
Biological Process positive regulation of DNA-templated transcriptionIDA:UniProtKB1 Publication
Biological Process positive regulation of neuron differentiationISS:UniProtKB
Biological Process positive regulation of transcription by RNA polymerase IIIDA:BHF-UCL1 Publication
Biological Process regulation of DNA-templated transcriptionNAS:UniProtKB1 Publication
Biological Process regulation of G1/S transition of mitotic cell cycleIDA:UniProtKB
Biological Process regulation of transcription by RNA polymerase IIIBA:GO_Central1 Publication

Nucleus

Agammaglobulinemia 8A, autosomal dominant (AGM8A):
A form of agammaglobulinemia, a primary immunodeficiency characterized by profoundly low or absent serum antibodies and low or absent circulating B-cells due to an early block of B-cell development. Affected individuals develop severe infections in the first years of life.

Phosphorylated following NGF stimulation.
Undergoes Notch-induced ubiquitination and subsequent proteasomal degradation which is mediated by ASB1 or ASB2, the substrate-recognition components of probable ECS E3 ubiquitin-protein ligase complexes.