WT1 (WT1 transcription factor)
Located on the short arm of human chromosome 11 (11p13), the Wilms Tumor 1 (WT1) gene encodes a critical zinc finger transcription factor that plays a pivotal role in embryonic development, particularly of the urogenital system, as well as in the regulation of cell proliferation and differentiation. The WT1 protein is characterized by the presence of four C2H2-type zinc finger domains, which facilitate sequence-specific DNA binding to modulate the transcription of target genes involved in growth factor signaling and apoptosis; notably, WT1 exhibits context-dependent dual functionality, acting as either an activator or repressor depending on the specific genomic locus and cellular environment. Its expression is highly restricted to key tissues, including renal glomerular podocytes, gonadal Sertoli and granulosa cells, and the hematopoietic system, where it is essential for maintaining structural integrity and functional differentiation. A unique feature distinguishing WT1 from other members of the early growth response (EGR) family is its extensive alternative splicing, which generates multiple isoforms—most notably the +KTS and -KTS variants—that differ in their DNA and RNA binding preferences, thereby expanding the complexity of its regulatory network. Mutations or alterations in WT1 expression are associated with a spectrum of severe phenotypes, including Denys-Drash syndrome (characterized by nephropathy, gonadal dysgenesis, and Wilms tumor) and Frasier syndrome (gonadal dysgenesis and nephrotic syndrome), as well as contributing to 10–20% of Wilms tumor cases, a pediatric renal malignancy where WT1 often functions as a tumor suppressor. Conversely, in the context of acute myeloid leukemia (AML), WT1 overexpression is frequently observed and is linked to poor prognosis, where it may act as an oncogene by disrupting normal hematopoietic differentiation and promoting leukemogenesis, thus illustrating the gene’s dual role as both a tumor suppressor and a proto-oncogene depending on tissue specificity and the nature of the molecular alteration.
Gene Ontology
Subcellular localization of WT1 (and its protein):
- plasma membrane
- cytoplasm
- extracellular
- golgi
- vesicle
- cytoskeleton
- endoplasmic reticulum
- nucleus
- endosome
- lysosome
- mitochondrion
Gene Ontology (GO) terms for WT1:
| Interacting Gene | Interaction | Source/Score |
| Disease | Score | NofPmids | NofSnps | Source |
| Denys-Drash Syndrome | 0.572691755 | 43 | 11 | BeFree_CLINVAR_CTD_human_GAD_LHGDN_MGD_ORPHANET_UNIPROT |
| Frasier Syndrome | 0.487610304 | 19 | 5 | BeFree_CLINVAR_CTD_human_LHGDN_ORPHANET_UNIPROT |
| Nephroblastoma | 0.444098287 | 220 | 2 | BeFree_CTD_human_GAD_LHGDN_ORPHANET_UNIPROT |
| MEACHAM SYNDROME (disorder) | 0.36 | 2 | 2 | CLINVAR_ORPHANET_UNIPROT |
| WAGR Syndrome | 0.246167218 | 14 | 0 | BeFree_CTD_human_GAD_ORPHANET |
| NEPHROTIC SYNDROME, TYPE 4 | 0.24 | 4 | 0 | CTD_human_UNIPROT |
| Leukemia, Myelocytic, Acute | 0.174303151 | 62 | 1 | BeFree_CTD_human_GAD_LHGDN |
| leukemia | 0.142840843 | 49 | 1 | BeFree_CTD_human_LHGDN |
| Mammary Neoplasms | 0.142337686 | 10 | 0 | BeFree_CTD_human_LHGDN |
| Desmoplastic Small Round Cell Tumor | 0.130314791 | 38 | 0 | BeFree_ORPHANET |
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