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Key Product Details

Validated by

Biological Validation

Species Reactivity

Human, Mouse, Rat, Canine, Kangaroo


ELISA, Flow Cytometry, Immunoblotting, Immunocytochemistry/ Immunofluorescence, Immunohistochemistry, Immunohistochemistry-Paraffin, Immunoprecipitation, Western Blot



Antibody Source

Polyclonal Rabbit IgG


2.5 mg/ml

Product Summary for ATM Antibody


ATM Antibody was made to a fragment of the human ATM protein corresponding to the C-terminus (within the last third of the protein sequence). [Uniprot: Q13315]

Reactivity Notes

Canine reactivity reported in scientific literature (PMID: 31648115).









Theoretical MW

351 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Scientific Data Images for ATM Antibody

Western Blot: ATM Antibody [NB100-104] - Detection of ATM in HeLa nuclear extract using ATM antibody [NB100-104]. Theoretical molecular weight 351 kDa.
Immunohistochemistry-Paraffin: ATM Antibody [NB100-104] - Staining of human tonsil, germinal center and mantle zone with ATM Antibody [NB100-104].
Immunocytochemistry/Immunofluorescence: ATM Antibody [NB100-104] - GM00637 cells with KU55933 pretreatment (a) were exposed to 50 uM spermidine or CCCP, followed by immunofluorescence analyses of total and p-ATM on Ser-1981. The scale bar is 10 um. Image collected and cropped by CiteAb from the following publication ( licensed under a CC-BY license.

Applications for ATM Antibody

Recommended Usage


reported in scientific literature (PMID 28512243)

Immunocytochemistry/ Immunofluorescence








Western Blot

Application Notes
In Western blot, it detects a band at ~350 kDa, representing ATM.
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Reviewed Applications

Read 2 reviews rated 4.5 using NB100-104 in the following applications:

Published Applications

Read 99 publications using NB100-104 in the following applications:

Formulation, Preparation, and Storage


Immunogen affinity purified


PBS, 50% Glycerol


0.05% Sodium Azide


2.5 mg/ml


The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Aliquot and store at -20C or -80C. Avoid freeze-thaw cycles.

Background: ATM

ATM (ataxia telangiectasia mutated kinase) is the master regulator of the DNA double-strand break (DSB) repair pathway. This ubiquitously expressed serine/threonine protein kinase belongs to the PI3K-like family of proteins and responds to DSBs caused by oxidative and other genotoxic stresses (1). In addition to regulating the DNA damage response, ATM participates in vesicle and protein transport, T-cell development, gonads/neurological function, pre-B cell allelic exclusion, cell cycle control, and acts as a tumor suppressor (2,3). Defects in ATM are associated with ataxia telangiectasia (AT), T-cell acute lymphoblastic leukemia (TALL), T-prolymphocytic leukemia (TPLL), and B-cell non-Hodgkin lymphomas (BNHL) including mantle cell lymphoma (MCL) and B-cell chronic lymphocytic leukemia (BCLL) (4).

The theoretical molecular weight of ATM is 350 kDa and it has 3 main domains: a FAT (focal adhesion targeting) domain (aa 1960-2566), a PI-3/PI-4 kinase catalytic domain (aa 2712-2962), and a C-terminal FAT domain (aa 3024-3056). ATM exists as a dimer or tetramer in its inactive state. Upon sensing DNA damage, the MRE11-RAD50-NBS1 (MRN) complex recruits ATM. The intricate process of ATM activation involves acetylation by KAT5/TIP60, autophosphorylation at Ser-1981, and dissociation into catalytically active monomers (5). Following activation, ATM phosphorylates multiple substrates such as p53/TP53 and Chk2 involved in DNA repair, checkpoint signaling, and the apoptosis pathway.


1. Paull TT. (2015) Mechanisms of ATM Activation. Annu Rev Biochem. 84:711-38. PMID: 25580527

2. Chaudhary MW and Al-Baradie RS. (2014) Ataxia-telangiectasia: future prospects. Appl Clin Genet. 7:159-167. PMID: 25258552

3. Stagni V, Cirotti C, and Barila D. (2018) Ataxia-Telangiectasia Mutated Kinase in the Control of Oxidative Stress, Mitochondria, and Autophagy in Cancer: A Maestro With a Large Orchestra. Front Oncol. 8:73. PMID: 29616191

4. Gumy-Pause F, Wacker P, and Sappino AP. (2004) ATM gene and lymphoid malignancies. Leukemia. 18(2):238-42. PMID: 14628072

5. Adamowicz M. (2018) Breaking up with ATM. J Immunol Sci. 2(1):26-31. PMID: 29652413

Long Name

Ataxia Telangiectasia-mutated

Alternate Names


Entrez Gene IDs

472 (Human)

Gene Symbol



Product Documents for ATM Antibody

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Product Specific Notices for ATM Antibody

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.


FAQs for ATM Antibody

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  • Q: What is the expiration date of this product?

    A: We guarantee the stability of this product for 1 year from the date of receipt.

  • Q: What is the isotype of this antibody?

    A: The isotype for this ATM Antibody is IgG.

  • Q: Which applications can I use this antibody in?

    A: This antibody has been cited in multiple publications for use in ELISA, flow cytometry, immunoblotting, ICC/IF, immunohistochemistry, immunoprecipitation, and western blot. This antibody has also been tested in IHC-Paraffin; therefore all of these applications fall under our 100% guarantee. If you would like to test this antibody in an application or species not listed, please check out our Innovator's Reward Program.

Showing  1 - 3 of 3 FAQs Showing All