Render Target: STATIC
Render Timestamp: 2024-11-22T11:33:51.198Z
Commit: 5c4accf06eb7154018ba3f54329c7590f97f534a
XML generation date: 2024-08-01 15:29:23.557
Product last modified at: 2024-11-18T18:45:11.893Z
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PDP - Template Name: Polyclonal Antibody
PDP - Template ID: *******59c6464

CTCF Antibody #2899

Filter:
  • WB
  • IP
  • IF
  • ChIP

    Supporting Data

    REACTIVITY H M R Mk
    SENSITIVITY Endogenous
    MW (kDa) 140
    SOURCE Rabbit
    Application Key:
    • WB-Western Blotting 
    • IP-Immunoprecipitation 
    • IF-Immunofluorescence 
    • ChIP-Chromatin Immunoprecipitation 
    Species Cross-Reactivity Key:
    • H-Human 
    • M-Mouse 
    • R-Rat 
    • Mk-Monkey 

    Product Information

    Product Usage Information

    For optimal ChIP results, use 20 μl of antibody and 10 μg of chromatin (approximately 4 x 106 cells) per IP. This antibody has been validated using SimpleChIP® Enzymatic Chromatin IP Kits.

    Application Dilution
    Western Blotting 1:1000
    Immunoprecipitation 1:50
    Immunofluorescence (Immunocytochemistry) 1:100 - 1:400
    Chromatin IP 1:25

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.

    Protocol

    Specificity / Sensitivity

    CTCF Antibody detects endogenous levels of total CTCF protein. This antibody does not cross-react with BORIS.

    Species Reactivity:

    Human, Mouse, Rat, Monkey

    Source / Purification

    Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to the carboxy terminus of the human CTCF protein. Antibodies are purified by protein A and peptide affinity chromatography.

    Background

    CCCTC-binding factor (CTCF) and its paralog, the Brother of the Regulator of Imprinted Sites (BORIS), are highly conserved transcription factors that regulate transcriptional activation and repression, insulator function, and imprinting control regions (ICRs) (1-4). Although they have divergent amino and carboxy termini, both proteins contain 11 conserved zinc finger domains that work in combination to bind the same DNA elements (1). CTCF is ubiquitously expressed and contributes to transcriptional regulation of cell-growth regulated genes, including c-Myc, p19/ARF, p16/INK4A, BRCA1, p53, p27, E2F1, and TERT (1). CTCF also binds to and is required for the enhancer-blocking activity of all known insulator elements and ICRs, including the H19/IgF2, Prader-Willi/Angelman syndrome, and Inactive X-Specific Transcript (XIST) anti-sense loci (5-7). CTCF DNA-binding is sensitive to DNA methylation, a mark that determines selection of the imprinted allele (maternal vs. paternal) (1). The various functions of CTCF are regulated by at least two different post-translational modifications. Poly(ADP-ribosyl)ation of CTCF is required for insulator function (8). Phosphorylation of Ser612 by protein kinase CK2 facilitates a switch of CTCF from a transcriptional repressor to an activator at the c-Myc promoter (9). CTCF mutations or deletions have been found in many breast, prostate, and Wilms' tumors (10,11). Expression of BORIS is restricted to spermatocytes and is mutually exclusive of CTCF (3). In cells expressing BORIS, promoters of X-linked cancer-testis antigens like MAGE-A1 are demethylated and activated, but methylated and inactive in CTCF-expressing somatic cells (12). Like other testis specific proteins, BORIS is abnormally expressed in different cancers, such as breast cancer, and has a greater affinity than CTCF for DNA-binding sites, detracting from CTCF’s potential tumor suppressing activity (1,3,13,14).
    For Research Use Only. Not For Use In Diagnostic Procedures.
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