IKZF1
IKZF1 | |||
---|---|---|---|
Identifiers | |||
Gene ontology | |||
Molecular function | |||
Cellular component | |||
Biological process |
| ||
Sources:Amigo / QuickGO |
View/Edit Human | View/Edit Mouse |
DNA-binding protein Ikaros also known as Ikaros family zinc finger protein 1 is a protein that in humans is encoded by the IKZF1 gene.[5][6][7]
Ikaros - transcription factor
Ikaros is a transcription factor that is encoded by the IKZF genes of the Ikaros family zinc finger group. Zinc finger is a small structural motif of protein that allows protein binding to DNA or RNA molecule that is characterized by the coordination of one or more zinc ions (Zn2+) in order to stabilize the fold.
Ikaros displays crucial functions in the
Ikaros also has a role during the later stages of B cell development during VDJ recombination in switch class of the antibody isotypes and expression of the B cell receptor.[11]
In Ikaros knockout mice, T cells but not B cells are generated late in mouse development due to late compensatory expression of the related gene Aiolos (IKZF3).
Further evidence shows that Ikaros regulates the development of medullary thymic epithelial cells (mTECs). Conditional deletion of Ikzf1 in thymic epithelial cells by Foxn1-Cre in mice, results in the dysregulation of various mTEC subsets, including the loss of Aire+ mTECs. The loss of Aire (Autoimmune regulator) expressing mTECs also causes global loss of tissue restricted antigens (TRAs) and Aire-dependent mimetic cell populations, with the loss of TRAs eventually leading to breakdown of immune tolerance.[16]
Genes of the Ikaros Zinc Finger Family group
The Ikaros Zinc Finger (IkZF) family of transcription factors are known regulators of hematopoietic cell development and many immune cells including that of CD4+ T cells.
The IkZF family consists of five members: Ikaros (encoded by the gene Ikzf1), Helios (Ikzf2), Aiolos (Ikzf3), Eos (Ikzf4), and Pegasus (Ikzf5). These factors contain N-terminal zinc finger (ZF) domains, which are responsible for mediating direct interactions with DNA, and C-terminal ZFs, which facilitate homo- and heterodimerization between IkZF family members. [17]
IKZF1 is upregulated in granulocytes, B cells, CD4 and CD8 T cells, and NK cells, and downregulated in erythroblasts, megakaryocytes and monocytes.[18]
Ikaros deficiency
The mutation in the IKZF1 gene can cause dysfunction of the Ikaros transcription factor. The dysfunction affects expression in B cells that can lead to deregulation of the BCR signaling during B cell development and is associated with B cell transformation. The deregulation then can result in low proliferation rate and increased apoptosis of the B cells. The deregulation may be related with lymphoproliferative disorders and different forms of leukemia. [19]
Interactions
IKZF1 has been shown to
References
- ^ a b c GRCh38: Ensembl release 89: ENSG00000185811 - Ensembl, May 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000018654 - Ensembl, May 2017
- ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- PMID 1439790.
- PMID 7935426.
- ^ "Entrez Gene: IKZF1 IKAROS family zinc finger 1 (Ikaros)".
- ^ PMID 21765975.
- S2CID 196350761.
- PMID 31244845.
- PMID 21765979.
- PMID 9143685.
- PMID 12871645.
- PMID 19684604.
- ^ PMID 21270240.
- S2CID 264518068.
- PMID 31244845.
- PMID 19228925.
- S2CID 196350761.
- PMID 10766745.
- ^ PMID 10357820.
- ^ PMID 12015313.
- S2CID 17835058.
- PMID 9155026.
- PMID 10204490.
- S2CID 28898354.
- PMID 10978333.
- PMID 11959865.
- PMID 28179282.
Further reading
- Tonnelle C, Calmels B, Maroc C, Gabert J, Chabannon C (January 2002). "Ikaros gene expression and leukemia". Leukemia & Lymphoma. 43 (1): 29–35. S2CID 23932398.
- Westman BJ, Mackay JP, Gell D (October 2002). "Ikaros: a key regulator of haematopoiesis". The International Journal of Biochemistry & Cell Biology. 34 (10): 1304–7. PMID 12127581.
- Molnár A, Wu P, Largespada DA, Vortkamp A, Scherer S, Copeland NG, et al. (January 1996). "The Ikaros gene encodes a family of lymphocyte-restricted zinc finger DNA binding proteins, highly conserved in human and mouse". Journal of Immunology. 156 (2): 585–92. S2CID 24893140.
- Nietfeld W, Meyerhans A (January 1996). "Cloning and sequencing of hIk-1, a cDNA encoding a human homologue of mouse Ikaros/LyF-1". Immunology Letters. 49 (1–2): 139–41. PMID 8964602.
- Morgan B, Sun L, Avitahl N, Andrikopoulos K, Ikeda T, Gonzales E, et al. (April 1997). "Aiolos, a lymphoid restricted transcription factor that interacts with Ikaros to regulate lymphocyte differentiation". The EMBO Journal. 16 (8): 2004–13. PMID 9155026.
- Kelley CM, Ikeda T, Koipally J, Avitahl N, Wu L, Georgopoulos K, Morgan BA (April 1998). "Helios, a novel dimerization partner of Ikaros expressed in the earliest hematopoietic progenitors". Current Biology. 8 (9): 508–15. S2CID 17835058.
- Sun L, Heerema N, Crotty L, Wu X, Navara C, Vassilev A, et al. (January 1999). "Expression of dominant-negative and mutant isoforms of the antileukemic transcription factor Ikaros in infant acute lymphoblastic leukemia". Proceedings of the National Academy of Sciences of the United States of America. 96 (2): 680–5. PMID 9892693.
- Kim J, Sif S, Jones B, Jackson A, Koipally J, Heller E, et al. (March 1999). "Ikaros DNA-binding proteins direct formation of chromatin remodeling complexes in lymphocytes". Immunity. 10 (3): 345–55. PMID 10204490.
- Honma Y, Kiyosawa H, Mori T, Oguri A, Nikaido T, Kanazawa K, et al. (March 1999). "Eos: a novel member of the Ikaros gene family expressed predominantly in the developing nervous system". FEBS Letters. 447 (1): 76–80. S2CID 28898354.
- Koipally J, Renold A, Kim J, Georgopoulos K (June 1999). "Repression by Ikaros and Aiolos is mediated through histone deacetylase complexes". The EMBO Journal. 18 (11): 3090–100. PMID 10357820.
- Sun L, Goodman PA, Wood CM, Crotty ML, Sensel M, Sather H, et al. (December 1999). "Expression of aberrantly spliced oncogenic ikaros isoforms in childhood acute lymphoblastic leukemia". Journal of Clinical Oncology. 17 (12): 3753–66. PMID 10577847.
- Hosokawa Y, Maeda Y, Ichinohasama R, Miura I, Taniwaki M, Seto M (April 2000). "The Ikaros gene, a central regulator of lymphoid differentiation, fuses to the BCL6 gene as a result of t(3;7)(q27;p12) translocation in a patient with diffuse large B-cell lymphoma". Blood. 95 (8): 2719–21. PMID 10753856.
- Koipally J, Georgopoulos K (June 2000). "Ikaros interactions with CtBP reveal a repression mechanism that is independent of histone deacetylase activity". The Journal of Biological Chemistry. 275 (26): 19594–602. PMID 10766745.
- Perdomo J, Holmes M, Chong B, Crossley M (December 2000). "Eos and pegasus, two members of the Ikaros family of proteins with distinct DNA binding activities". The Journal of Biological Chemistry. 275 (49): 38347–54. PMID 10978333.
- Payne KJ, Nicolas JH, Zhu JY, Barsky LW, Crooks GM (August 2001). "Cutting edge: predominant expression of a novel Ikaros isoform in normal human hemopoiesis". Journal of Immunology. 167 (4): 1867–70. PMID 11489963.
- Koipally J, Heller EJ, Seavitt JR, Georgopoulos K (April 2002). "Unconventional potentiation of gene expression by Ikaros". The Journal of Biological Chemistry. 277 (15): 13007–15. PMID 11799125.
- Dorsam G, Goetzl EJ (April 2002). "Vasoactive intestinal peptide receptor-1 (VPAC-1) is a novel gene target of the hemolymphopoietic transcription factor Ikaros". The Journal of Biological Chemistry. 277 (16): 13488–93. PMID 11812772.
External links
- IKZF1+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
- IKZF1 human gene location in the UCSC Genome Browser.
- IKZF1 human gene details in the UCSC Genome Browser.