It plays a role in cell growth, cell specialization, and the patterning of structures such as the brain and limbs. Depending on signals from Sonic Hedgehog, the GLI3 protein can either turn on (activate) or turn off (repress) other genes.
What mutations cause polydactyly?
Mutation analysis showed a substitution mutation of 1927C –> T in exon 12 of the GLI3 gene, which is predicted to pretruncate the GLI3 protein. This mutation has variable phenotypes of polydactyly, indicating that other genetic factors also contribute to the diversity of polydactyly phenotypes.
What happens if a transcription factor is mutated?
Transcription-factor mutations include both loss-of-function mutations (which can be either recessive or dominant, depending on whether one functional copy of the gene can encode sufficient active protein to induce transcription) and dominant negative mutations, those in which the mutant protein interferes with the …
Where is GLI3 expressed?
Several publications have reported that human GLI3 is located on chromosome 7p13 [5, 8, 23]. However as mentioned earlier, recent updates on NCBI have mapped human GLI3 to chromosome 7p14. 1 (Gene ID: 2737) [4, 108, 109].
What does GLI3 stand for?
GLI3 (GLI Family Zinc Finger 3) is a Protein Coding gene. Diseases associated with GLI3 include Greig Cephalopolysyndactyly Syndrome and Polydactyly, Postaxial, Type A1. Among its related pathways are Ectoderm Differentiation and Signaling by Hedgehog.
Is polydactyly a mutation?
Polydactyly can occur by itself, or more commonly, as one feature of a syndrome of congenital anomalies. When it occurs by itself, it is associated with autosomal dominant mutations in single genes, i.e. it is not a multifactorial trait. But mutation in a variety of genes can give rise to polydactyly.
What chromosome is affected by polydactyly?
Phenotype-Gene Relationships
| Location | Phenotype | Gene/Locus |
|---|---|---|
| 7p14.1 | Polydactyly, postaxial, types A1 and B | GLI3 |
What type of genetic disorder is polydactyly?
Polydactyly is an abnormality characterized by extra fingers or toes. The condition may be present as part of a collection of abnormalities, or it may exist by itself. When polydactyly exhibits by itself, it is inherited as an autosomal dominant trait.
What is transcriptional dysregulation?
A disease mechanism that disrupts the expression of certain genes, which affects when essential proteins are produced by the cell. Transcriptional dysregulation plays a major role in HD.
What is Greig syndrome?
Greig cephalopolysyndactyly syndrome is a disorder that affects development of the limbs, head, and face. The features of this syndrome are highly variable, ranging from very mild to severe.
Is Angelman syndrome maternal?
Angelman syndrome is caused by a large deletion of the region of the maternal chromosome that contains UBE3A, or by a DNA sequence change (mutation) in the UBE3A gene inherited from the mother.
What is the pathophysiology of Gli3?
GLI3: a mediator of genetic diseases, development and cancer. Novel GLI3 pathogenic variants in complex pre- and postaxial polysyndactyly and Greig cephalopolysyndactyly syndrome. A GLI3 variant leading to polydactyly in heterozygotes and Pallister-Hall-like syndrome in a homozygote.
What does Gli3 stand for?
An intron variant of the GLI family zinc finger 3 (GLI3) gene differentiates resistance training-induced muscle fiber hypertrophy in younger men. Compound heterozygous GLI3 variants in siblings with thyroid hemiagenesis.
Is Gli3 a downstream target of mir200a in polysyndactyly?
Novel frameshift mutations of ANKUB1, GLI3, and TAS2R3 associated with polysyndactyly in a Chinese family. Gli3 is a novel downstream target of miR200a with an anti fi brotic role for progression of liver fibrosis in vivo and in vitro.
