Product Pathways - Chromatin Regulation / Epigenetics
SimpleChIP® Enzymatic Chromatin IP Kit (Agarose Beads) #9002
|9002S||1 Kit (30 immunoprecipitations)||---||In Stock||---|
|9002||carrier free and custom formulation / quantity||email request|
|Kit Includes||Volume||Storage Temp|
|Glycine Solution (10X)||1 x 100 ml||4°C|
|Buffer A (4X)||1 x 25 ml||4°C|
|Buffer B (4X)||1 x 25 ml||4°C|
|ChIP Buffer (10X)||1 x 20 ml||4°C|
|ChIP Elution Buffer (2X)||1 x 7 ml||4°C|
|5 M NaCl||1 x 3 ml||4°C|
|ChIP-Grade Protein G Agarose Beads #9007||1 x 1 ml||4°C|
|DNA Binding Reagent A (add 12 ml isopropanol before use)||1 x 12 ml||RT|
|DNA Wash Reagent B (add 24 ml ethanol before use)||1 x 6 ml||RT|
|DNA Elution Reagent C||2 x 1 ml||RT|
|DNA Spin Columns||1 x 36 Pack||RT|
|Protease Inhibitor Cocktail (200X)||1 x 500 µl||-20°C|
|RNAse A (10 mg/ml)||1 x 50 µl||-20°C|
|Micrococcal Nuclease #10011||1 x 60 µl||-20°C|
|Proteinase K||1 x 100 µl||-20°C|
|SimpleChIP® Human RPL30 Exon 3 Primers #7014||1 x 150 µl||-20°C|
|SimpleChIP® Mouse RPL30 Intron 2 Primers #7015||1 x 150 µl||-20°C|
|Histone H3 (D2B12) XP® Rabbit mAb (ChIP Formulated) #4620||1 x 100 µl||-20°C|
|Normal Rabbit IgG #2729||1 x 50 µl||-20°C|
The SimpleChIP® Enzymatic Chromatin IP Kit (Agarose Beads) contains the buffers and reagents necessary to perform up to 6 chromatin preparations and 30 chromatin immunoprecipitations and is optimized for 4 X 107 cells per experiment. A complete assay can be performed in as little as two days and can easily be scaled up or down for use with more or fewer cells.
Cells are fixed with formaldehyde and lysed, and chromatin is fragmented by partial digestion with Micrococcal Nuclease to obtain chromatin fragments of 1 to 5 nucleosomes. Enzymatic fragmentation of chromatin is much milder than sonication and eliminates problems resulting from variability in sonication power and emulsification of chromatin during sonication, which can result in incomplete fragmentation of chromatin or loss of antibody epitopes due to protein denaturation and degradation. Chromatin immunoprecipitations are performed using ChIP-validated antibodies and ChIP-Grade Protein G Agarose Beads. After reversal of protein-DNA cross-links, the DNA is purified using DNA purification spin columns, allowing for easy and efficient recovery of DNA and removal of protein contaminants without the need for phenol/chloroform extractions and ethanol precipitations. The enrichment of particular DNA sequences during immunoprecipitation can be analyzed by standard PCR, quantitative real-time PCR, or amplification for ChIP on chip, sequencing or cloning techniques.
The SimpleChIP® Kit also provides important controls to ensure a successful ChIP experiment. The kit contains a positive control Histone H3 Antibody, a negative control Normal Rabbit IgG Antibody and primer sets for PCR detection of the human and mouse ribosomal protein L30 (RPL30) genes. Histone H3 is a core component of chromatin and is bound to most DNA sequences throughout the genome, including the RPL30 locus. Thus, the Histone H3 Antibody provides a universal positive control that should enrich for almost any locus examined.
Specificity / Sensitivity
The SimpleChIP® Enzymatic Chromatin IP Kit can be utilized with any ChIP-validated antibody to detect endogenous levels of protein-DNA interactions and histone modifications in mammalian cells (see Figures 2 and 3). The positive control Histone H3 Antibody recognizes many different species of the highly conserved Histone H3 protein, including human, mouse, rat and monkey. Primer sets are included for the human and mouse positive control RPL30 gene loci; however, the use of other species with the kit requires the design of additional control primer sets.
FIGURE 2. Chromatin immunoprecipitations were performed using digested chromatin from HeLa cells and either Histone H3 (D2B12) XP® Rabbit mAb (ChIP Formulated) #4620 (lane 2), Rpb1 CTD (4H8) Mouse mAb #2629 (lane 3), Di-Methyl Histone H3 (Lys9) Antibody #9753 (lane 4) or Normal Rabbit IgG #2729 (lane 5). Purified DNA was analyzed by standard PCR methods using SimpleChIP® Human RPL30 Exon 3 Primers #7014, SimpleChIP® Human MyoD1 Exon 1 Primers #4490, and SimpleChIP® Human α Satellite Repeat Primers #4486. PCR products were observed for each primer set in the input sample (lane 1) and various protein-specific immunoprecipitations but no PCR products were observed with immunoprecipitation using Normal Rabbit IgG #2729 (lane 5).
FIGURE 1. HeLa cells were formaldehyde-crosslinked and chromatin was prepared and digested as described in Section A of protocol. DNA was purified as described in Section B and 10 μl were separated by electrophoresis on a 1% agarose gel (lane 2) and stained with ethidium bromide. Lane 2 shows that the majority of chromatin was digested to 1 to 5 nucleosomes in length (150 to 900 bp).
FIGURE 3. Chromatin immunoprecipitations were performed using digested chromatin from HeLa cells and the indicated ChIP-validated antibodies. Purified DNA was analyzed by quantitative real-time PCR, using SimpleChIP® Human RPL30 Exon 3 Primers #7014 (control primer set), SimpleChIP® Human MyoD1 Exon 1 Primers #4490, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin (equivalent to 1).
The chromatin immunoprecipitation (ChIP) assay is a powerful and versatile technique used for probing protein-DNA interactions within the natural chromatin context of the cell (1,2). This assay can be used to identify multiple proteins associated with a specific region of the genome, or the opposite, to identify the many regions of the genome bound by a particular protein (3-6). It can be used to determine the specific order of recruitment of various proteins to a gene promoter or to "measure" the relative amount of a particular histone modification across an entire gene locus (3,4). In addition to histone proteins, the ChIP assay can be used to analyze binding of transcription factors and co-factors, DNA replication factors and DNA repair proteins. When performing the ChIP assay, cells or tissues are first fixed with formaldehyde, a reversible protein-DNA cross-linking agent that "preserves" the protein-DNA interactions occurring in the cell (1,2). Cells are lysed and chromatin is harvested and fragmented using either sonication or enzymatic digestion. The chromatin is then immunoprecipitated with antibodies specific to a particular protein or histone modification. Any DNA sequences that are associated with the protein or histone modification of interest will co-precipitate as part of the cross-linked chromatin complex and the relative amount of that DNA sequence will be enriched by the immunoselection process. After immunoprecipitation, the protein-DNA cross-links are reversed and the DNA is purified. Standard PCR or Quantitative Real-Time PCR can be used to measure the amount of enrichment of a particular DNA sequence by a protein-specific immunoprecipitation (1,2). Alternatively, the ChIP assay can be combined with genomic tiling micro-array (ChIP on chip) techniques, high throughput sequencing, or cloning strategies, all of which allow for genome-wide analysis of protein-DNA interactions and histone modifications (5-8).
- Orlando, V. (2000) Trends Biochem Sci 25, 99-104.
- Kuo, M.H. and Allis, C.D. (1999) Methods 19, 425-33.
- Agalioti, T. et al. (2000) Cell 103, 667-78.
- Soutoglou, E. and Talianidis, I. (2002) Science 295, 1901-4.
- Mikkelsen, T.S. et al. (2007) Nature 448, 553-60.
- Lee, T.I. et al. (2006) Cell 125, 301-13.
- Weinmann, A.S. and Farnham, P.J. (2002) Methods 26, 37-47.
- Wells, J. and Farnham, P.J. (2002) Methods 26, 48-56.
- Czymai, T. et al. (2010) J Biol Chem 285, 10163-78. Applications: Chromatin IP.
- Ghosh, R. et al. (2010) PLoS One 5, e9575. Applications: Chromatin IP.
- Xu, Y. et al. (2010) J Cell Biol 191, 31-43. Applications: Chromatin IP.
- Jiang, Q. et al. (2011) Mol Biol Cell 22, 1167-80. Applications: Chromatin IP.
- Zhang, M.A. et al. (2012) Proc Natl Acad Sci U S A 109, 9505-10. Applications: Chromatin IP.
- Janzer, A. et al. (2012) J Biol Chem 287, 30984-92. Applications: Chromatin IP.
- Chiang, C.K. et al. (2012) Am J Physiol Cell Physiol , . Applications: Chromatin IP.
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- 9649 Acetyl-Histone H3 (Lys9) (C5B11) Rabbit mAb
- 9677 Acetyl-Histone H3 (Lys9/Lys14) Antibody
- 9007 ChIP-Grade Protein G Agarose Beads
- 9725 Di-Methyl-Histone H3 (Lys4) (C64G9) Rabbit mAb
- 9753 Di-Methyl-Histone H3 (Lys9) Antibody
- 2729 Normal Rabbit IgG
- 12931 Nuclease-free Water
- 2629 Rpb1 CTD (4H8) Mouse mAb
- 9751 Tri-Methyl-Histone H3 (Lys4) (C42D8) Rabbit mAb
This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
SimpleChIP is a registered trademark of Cell Signaling Technology, Inc.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.