53BP1 Antibody [FITC]


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Product Details

Reactivity Hu, MuSpecies Glossary
Applications ICC/IF, IHC, IHC-P

53BP1 Antibody [FITC] Summary

A synthetic peptide corresponding to a portion of human 53BP1 encoded in exon 11, 12 and 19 [UniProt# Q12888]. This antibody is a cocktail hybrid of NB100-304 and NB100-305.
DNA Double Strand Break Marker
Immunogen affinity purified
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  • Immunocytochemistry/Immunofluorescence
  • Immunohistochemistry
  • Immunohistochemistry-Paraffin
Application Notes
This 53BP1 antibody is useful for Immunocytochemistry/Immunofluorescence, Western Blot and Immunohistochemistry paraffin embedded sections. In Western blot a band was observed at ~220 kD. Irradiated lysates demonstrate a gel shift. Prior to immunostaining paraffin tissues, antigen retrieval with sodium citrate buffer (pH 6.0) is recommended.

Reactivity Notes

Human has been tested in WB, IHC and ICC/IF, mouse has only been tested in ICC/IF.

Packaging, Storage & Formulations

Store at 4C in the dark.
0.05% Sodium Azide
Immunogen affinity purified


This conjugate is made on demand. Actual recovery may vary from the stated volume of this product. The volume will be greater than or equal to the unit size stated on the datasheet.

Alternate Names for 53BP1 Antibody [FITC]

  • 53BP1
  • MGC138366
  • p202
  • p53-binding protein 1
  • p53BP1,53BP1FLJ41424
  • TP53BP1
  • tumor protein 53-binding protein, 1
  • tumor protein p53 binding protein 1
  • tumor protein p53-binding protein, 1
  • tumor suppressor p53-binding protein 1


53BP1 (p53 binding protein 1) plays a key role in response to DNA damage, checkpoint signaling during mitosis and enhancing TP53-mediated transcriptional activation. Originally identified as p53's transcriptional enhancing partner, 53BP1 now has been established as a substrate for ATM (ataxia telangiectasia mutated) signaling and that it relocalizes to discrete foci overlapping with gamma H2AX (phosphorylated histone H2AX); demarcating DNA double strand breaks (DSBs) sites following exposure to radiation. 53BP1 functions downstream of gamma H2AX-dependent hierarchy of proteins that collectively establish IRIF (ionizing radiation induced foci) at DSBs; this hierarchy includes Mre11/Rad50/NBS1 (MRN complex), ATM, MDC1, RNF8, RNF168 and HERC2. With the exception of ATM, whose function to generate gamma H2AX may be partially compensated by the activity of DNA-PK (DNA-dependent kinase), all of these proteins are physically and functionally required to recruit 53BP1 to the DSB site. Briefly, this process involves DSB recognition by MRN, ATM activation, gamma H2AX-formation, MDC1-recruitment, MRN-retention (leading to further ATM-activation and gamma H2AX spreading) and RNF8/RNF168/HERC2-mediated histone H2A and H2AX mono and poly-ubiquitination.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Product General Protocols

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

Video Protocols

ICC/IF Video Protocol

FAQs for 53BP1 Antibody (NB100-904F). (Showing 1 - 2 of 2 FAQ).

  1. We're looking for anti53BP1 antibody covalently labeled with a fluorofor preferabley Cy3. Do you make it?
    • We sell 53BP1 antibodies available conjugated to DyLight 488, 550 (very similar in spectrum to Cy3) and 650. You may also purchase the unlabeled antibodies and conjugate them to the fluorophores of your choice. The catalog numbers that you may be interested in are: NB100-904R, NB100-304R, NB100-305R.
  2. Hello I want to ask you for an advice in case of antibodies. In our research we focus on DNA repair foci and use your Novus antibodies for phosphorylated histone H2AX (monoclonal mouse) and protein 53BP1(polyclonal rabbit). Now we want to use antobody for phosphorylated 53BP1 protein to increase specifity and I want to ask you which from your NOVUS antibodies will be the best for us.
    • We currently stock just one antibody to phosphorylated 53BP1, which you can see at the following link: NB100-1803. This is guaranteed for detection of 53BP1 (pSer25) in human and mouse samples by WB, FLOW, ICC/IF,IHC-P, IP and PLA. As this antibody is a rabbit polyclonal, you would be unable to stain for both 53BP1 and its phosphorylated isoform in the same sample, unless you used an antibody from a different host for detection of total 53BP1 or used directly conjugated primaries. Our mouse monoclonal to 53BP1, with catalogue number NBP2-25028, is validated for detection of the human protein by WB, FLOW and IHC. Unfortunately we do not currently stock any other antibodies to phosphorylated 53BP1.

Secondary Antibodies


Isotype Controls

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Blogs on 53BP1.

The recent relationship of BRCA1 and 53BP1
The p53-binding protein 1 (53BP1) is a DNA damage response factor, which is recruited to nuclear structures at the site of DNA damage.  DNA double-strand breaks (DSBs) are mutations that are detrimental to cell viability and genome stability, and m...  Read full blog post.

53BP1 - a marker for DNA Double Strand Break
53BP1 (p53 binding protein 1) was originally thought to be an enhancer for p53 transcriptional, but later studies have demonstrated that it is actually a substrate for ataxia telangiectasia mutated (ATM). 53BP1 is a classic late DNA damage response...  Read full blog post.

53BP1 - DNA damage is no fun
The 53BP1 (p53 binding protein 1) was initially believed to be a p53 transcriptional enhancing partner, but it has now been established as an ataxia telangiectasia mutated (ATM) substrate. As a late DNA damage response (DDR) marker, 53BP1 appears duri...  Read full blog post.

53BP1, DNA Damage Response and Tumor Suppression
53BP1 (p53 binding protein 1) was originally thought to be a p53 transcriptional enhancing partner, but now has been shown to be an ataxia telangiectasia mutated (ATM) substrate. It is a late DNA damage response (DDR) marker, appearing in the telophas...  Read full blog post.

53BP1, DNA Damage Response and Tumor Suppression
53BP1 (p53 binding protein 1) was originally thought to be a p53 transcriptional enhancing partner, but now has been shown to be an ataxia telangiectasia mutated (ATM) substrate. It is a late DNA damage response (DDR) marker, appearing in the telophas...  Read full blog post.

NUP153 & 53BP1: A Novel DNA Repair Pathway
Mediating DNA damage is a crucial process, and one of the most important cellular guards against cancer. In response to DNA damage, sophisticated cellular machinery is recruited to repair the breaks, and if it fails, the cell is committed to death. De...  Read full blog post.

Blocking 53BP1 Expression Lessens Tumor Development in BRCA1-Defective Mice
Our antibody database at Novus Biologicals provides research tools for the forefront of cancer research. Recently, a mouse study using 53BP1 and BRCA1 antibodies showed that deletion of 53BP1 greatly lessened the incidence of tumor development in mice...  Read full blog post.

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Gene Symbol TP53BP1