FOXD3: Forkhead Box D3 – A Key Regulator in Neural Crest Development and Melanocyte Differentiation
Comprehensive genomic and functional analysis of FOXD3, a transcription factor critical for embryonic development and implicated in cancer and neurocristopathies.
Gene Information Card
| Symbol | FOXD3 |
|---|---|
| Full Name | Forkhead Box D3 |
| Gene Type | protein-coding |
| Chromosomal Location | 1p31.3 |
| NCBI Gene ID | 27022 ncbi.nlm.nih.gov/gene/27022 |
| Ensembl ID | ENSG00000187140 |
| UniProt ID | Q9UJU5 |
| OMIM ID | 611539 |
| HGNC ID | 3807 |
| Aliases | AIS1, HFH2, FKHL10, genesis |
Description
FOXD3 (Forkhead Box D3) encodes a member of the forkhead/winged-helix family of transcription factors. It is essential for neural crest cell specification, maintenance, and migration during embryonic development. FOXD3 also plays a role in melanocyte stem cell survival and differentiation. Dysregulation of FOXD3 is associated with neurocristopathies such as Waardenburg syndrome and with melanoma progression.
Disease Associations
| Disease category | Pathophysiological mechanism | Genomic evidence |
|---|---|---|
| Waardenburg syndrome type 2E | Loss-of-function mutations in FOXD3 impair neural crest cell development, leading to pigmentation defects and hearing loss. | OMIM #611539; ClinVar |
| Melanoma | FOXD3 acts as a lineage-survival oncogene in melanoma; overexpression promotes tumorigenesis and resistance to targeted therapy. | COSMIC; PMID: 23525026 |
| Neuroblastoma | FOXD3 expression is associated with neural crest-derived tumors; aberrant methylation may contribute to pathogenesis. | NCBI Gene; PMID: 19258504 |
Expression Profile
Tissue Expression
| Tissue | nTPM | level |
|---|---|---|
| Skin | 0.3 | Low |
| Brain | 0.1 | Low |
| Testis | 0.2 | Low |
| Thyroid | 0.1 | Low |
| Adipose tissue | 0.1 | Low |
Cell Line Expression
| Cell Line | nTPM | Notes |
|---|---|---|
| SK-MEL-28 (melanoma) | 0.5 | Moderate expression; role in melanocyte lineage |
| SH-SY5Y (neuroblastoma) | 0.2 | Low expression; neural crest origin |
| HEK293 (embryonic kidney) | 0.1 | Very low expression |
Data source：Human Protein Atlas（proteinatlas.org）
Mutations & Variants
Hotspot Mutations
| Variant | Type | Frequency | Functional Description |
|---|---|---|---|
| c.103C>T (p.Arg35Cys) | Missense | Rare | Loss of DNA-binding activity; associated with Waardenburg syndrome |
| c.244G>A (p.Gly82Ser) | Missense | Rare | Reduced transcriptional activity; reported in neurocristopathy |
| Amplification | Copy number gain | Frequent in melanoma | Increased FOXD3 expression; promotes oncogenesis |
Mutation functional classification
Loss of Function (LOF)
Missense mutations in the forkhead domain (e.g., p.Arg35Cys) impair DNA binding and transcriptional activation, leading to haploinsufficiency in Waardenburg syndrome.
Gain of Function (GOF)
Gene amplification and overexpression in melanoma enhance survival and proliferation of melanocytic cells.
Dominant Negative (DN)
Not clearly documented; some missense variants may act in a dominant-negative manner by interfering with wild-type FOXD3 function.
View complete mutation data：
Gene Ontology (GO)
Pathways
• Neural crest differentiation
• Melanocyte development and pigmentation
• FOXD3-mediated transcriptional regulation
Protein Summary
FOXD3 is a 462-amino acid transcription factor containing a conserved forkhead DNA-binding domain. It binds to DNA sequences with the core motif 5'-RYMAAYA-3' and regulates genes involved in neural crest specification, migration, and melanocyte stem cell maintenance. The protein localizes to the nucleus and can act as both a transcriptional activator and repressor depending on cellular context. Post-translational modifications include phosphorylation, which modulates its stability and activity.
Related Services
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| FOXD3 Knockout HEK293 Cell Line | EDJ-KQ1448 | Human | 27022 | Details Get a Quote |
| FOXD3 Knockout HeLa Cell Line | EDJ-KQ55985 | Human | 27022 | Details Get a Quote |
| FOXD3 Knockout A-549 Cell Line | EDJ-KQ64469 | Human | 27022 | Details Get a Quote |
| FOXD3 Knockout HCT 116 Cell Line | EDJ-KQ72927 | Human | 27022 | Details Get a Quote |
