ZBTB4 (Zinc finger and BTB domain-containing protein 4, KAISO-L1, ZNF903)

The ZBTB family of proteins is comprised of diverse zinc finger proteins that also contain a BTB (BR-C, ttk and bab) domain. Similar to Kaiso, a zinc-finger containing protein that can bind methylated CpGs, ZBTB4 can also bind methylated DNA and repress transcription. ZBTB4 has been shown to associate with the Sin3/histone deacetylase co-repressor and repress expression of P21CIP1 as part of a heterodimeric complex with Miz1. In cultured cells, depletion of ZBTB4 promotes cell cycle arrest in response to p53 activation and suppresses apoptosis through regulation of P21CIP1, suggesting that ZBTB4 is a critical determinant of the cellular response to p53 activation. HIPK2, a kinase that is involved in cellular proliferation and survival, phosphorylates and down-regulates ZBTB4 under normal cell growth conditions; this degradation increases with DNA damage.\n\nApplications:\nSuitable for use in ELISA, Western Blot, Immunofluorescence and Immunohistochemistry. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 1ug/ml\nImmunohistochemistry (Formalin fixed paraffin embedded): 2.5ug/ml\nOptimal dilutions to be determined by the researcher.\n\nPositive Control:\nSK-N-SH Cell Lysate\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

146784

Size

100ug

Applications

ELISA, IF, IHC, WB

Hosts

Rabbit

Reactivities

Hum, Mouse

Form

Supplied as a liquid in PBS, 0.02% sodium azide.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

Isotype

IgG

References

1. Strausberg RL, Feingold EA, Grouse LH, et al. Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. Proc. Natl. Acad. Sci. USA2002; 99:16899-903. 2. Filion GJP, Zhenilo S, Salozhin S, et al. A family of zinc finger proteins that bind methylated DNA and repress transcription. Mol. Cell. Biol.2006; 26:169-81. 3. Weber A, Marquardt J, Elzi D, et al. Zbtb4 represses transcription of P21CIP1 and controls the cellular response to p53 activation. EMBO J.2008; 27:1563-74. 4. Yamada D, Perez-Torrado R, Filion G, et al. The human protein kinase HIPK2 phosphorylates and downregulates the methyl-binding transcription factor ZBTB4. Oncogene2009; 28:2535-44.

Additional Info

Recognizes human ZBTB4. Species Crossreactivity: mouse.