TF Info Page for IKZF1 (C2H2 ZF(non-KRAB))
Conclusion
| Assessment | Binding Mode | Motif Status | Notes | Comments |
|---|---|---|---|---|
| Known motif | 1 Monomer or homomultimer | In vivo/Misc source | Only known motifs are from Transfac or HocoMoco - origin is uncertain |
Description
| Description: | IKAROS family zinc finger 1 [Source:HGNC Symbol;Acc:HGNC:13176] | |||||||||||||||||||||
| Entrez Summary | This gene encodes a transcription factor that belongs to the family of zinc-finger DNA-binding proteins associated with chromatin remodeling. The expression of this protein is restricted to the fetal and adult hemo-lymphopoietic system, and it functions as a regulator of lymphocyte differentiation. Several alternatively spliced transcript variants encoding different isoforms have been described for this gene. Most isoforms share a common C-terminal domain, which contains two zinc finger motifs that are required for hetero- or homo-dimerization, and for interactions with other proteins. The isoforms, however, differ in the number of N-terminal zinc finger motifs that bind DNA and in nuclear localization signal presence, resulting in members with and without DNA-binding properties. Only a few isoforms contain the requisite three or more N-terminal zinc motifs that confer high affinity binding to a specific core DNA sequence element in the promoters of target genes. The non-DNA-binding isoforms are largely found in the cytoplasm, and are thought to function as dominant-negative factors. Overexpression of some dominant-negative isoforms have been associated with B-cell malignancies, such as acute lymphoblastic leukemia (ALL). [provided by RefSeq, May 2014] | |||||||||||||||||||||
| Ensembl ID: | ENSG00000185811 | |||||||||||||||||||||
| External Link: | CisBP | |||||||||||||||||||||
| Interpro | IPR007087; IPR015880; | |||||||||||||||||||||
| Protein Domain: | ENSP00000331614 | |||||||||||||||||||||
| Protein Domain: | ENSP00000352123 | |||||||||||||||||||||
| Protein Domain: | ENSP00000388478 | |||||||||||||||||||||
| Protein Domain: | ENSP00000409588 | |||||||||||||||||||||
| Protein Domain: | ENSP00000413025 | |||||||||||||||||||||
| Protein Domain: | ENSP00000483016 | |||||||||||||||||||||
| Protein Domain: | ENSP00000396554 | |||||||||||||||||||||
| Domain: |
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Previous Annotations
| Source | Annotation |
| TF-CAT classification |
TF Gene_DNA-Binding sequence-specific_DNA Binding Transactivation_ PMIDS:15841184 |
| Vaquerizas 2009 TF classification "a" Has direct evidence of TF function; "b" Has evidence for an orthologous TF; "c" contains likely DBDs, but has no functional evidence; "x" is an unlikely TF such as predicted gene, genes with likely non-specific DBDs or that have function outside transcription; "other" category contains proteins without clear DBDs they curated from external sources. |
a |
| CisBP considers it as a TF? | Yes |
| TFclass considers it as a TF? | Yes |
| Has GO:0003700 "transcription factor activity, sequence-specific DNA binding" | Yes |
| GO-Info |
GO:0003700 sequence-specific DNA binding transcription factor activity IBA - GO_REF:0000033 |
|
Initial Assessment
1a1 Protein has a high confidence PWM (HT-SELEX, PBM or B1H model) or there is a crystal structure that supports sequence specific DNA binding; 1a2 There is high confidence data for a close ortholog (as defined in CisBP); 2a1 There is lower confidence direct evidence, such as a Jaspar, Hocomoco or Transfac model; 2a2 There is lower confidence evidence for an close ortholog; 3a There is decent circumstantial evidence for its role as a TF or not; 4a Two or more datasets predict it as a TF; 5a One of the source datasets predicts is as a TF |
2a1, Lower confidence direct evidence |
| TF has conditional DNA-binding requirements |