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TGIF1 TGFB induced factor homeobox 1

Also known as: HPE4; TGIF

Summary

The protein encoded by this gene is a member of the three-amino acid loop extension (TALE) superclass of atypical homeodomains. TALE homeobox proteins are highly conserved transcription regulators. This particular homeodomain binds to a previously characterized retinoid X receptor responsive element from the cellular retinol-binding protein II promoter. In addition to its role in inhibiting 9-cis-retinoic acid-dependent RXR alpha transcription activation of the retinoic acid responsive element, the protein is an active transcriptional co-repressor of SMAD2 and may participate in the transmission of nuclear signals during development and in the adult. Mutations in this gene are associated with holoprosencephaly type 4, which is a structural anomaly of the brain. Alternative splicing has been observed at this locus and multiple splice variants encoding distinct isoforms are described. [provided by RefSeq, Jul 2013]

Copy number response

Description
Copy number response
Triplosensitivity

No evidence available (Last evaluated (2012-05-10)

ClinGen Genome Curation Page
Haploinsufficency

Sufficient evidence for dosage pathogenicity (Last evaluated (2012-05-10)

ClinGen Genome Curation PagePubMed

Genomic context

Location:
18p11.3
Sequence:
Chromosome: 18; NC_000018.10 (3411927..3458411)
Total number of exons:
10

Links

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