Register or Login
  • All
  • Uniprot Id
  • Catalog #
  • Peptide Sequence
>   home   >   Products   >   Primary Antibodies   >   Antibody Collections   >   Phospho Antibodies   >   ATM Antibody Phospho (pS1981)   

ATM Antibody Phospho (pS1981)

Rabbit Monoclonal Antibody

  • WB - ATM Antibody Phospho (pS1981) AJ1066b
    A. Western blot analysis on HEK293 cell lysates using anti-ATM Phospho (pS1981) RabMAb (Cat. #AJ1066b), dilution at 1:10,000. Cells were either (A) untreated or (B) treated with doxorubicin.
  • IHC - ATM Antibody Phospho (pS1981) AJ1066b
    B. Immunohistochemical analysis of paraffin-embedded human gastric carcinoma using anti-ATM Phospho (pS1981) RabMAb (Cat. #AJ1066b).
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession Q13315
Reactivity Human
Host Rabbit
Clonality Monoclonal
Clone Names EP1890Y
Calculated MW 350687 Da
Gene ID 472
Other Names Serine-protein kinase ATM, Ataxia telangiectasia mutated, A-T mutated, ATM
Target/Specificity A synthetic peptide corresponding to residues surrounding serine 1981 of human ATM was used as an immunogen.
Dilution WB~~1:5000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsATM Antibody Phospho (pS1981) is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name ATM
Function Serine/threonine protein kinase which activates checkpoint signaling upon double strand breaks (DSBs), apoptosis and genotoxic stresses such as ionizing ultraviolet A light (UVA), thereby acting as a DNA damage sensor. Recognizes the substrate consensus sequence [ST]-Q. Phosphorylates 'Ser-139' of histone variant H2AX/H2AFX at double strand breaks (DSBs), thereby regulating DNA damage response mechanism. Also plays a role in pre-B cell allelic exclusion, a process leading to expression of a single immunoglobulin heavy chain allele to enforce clonality and monospecific recognition by the B-cell antigen receptor (BCR) expressed on individual B-lymphocytes. After the introduction of DNA breaks by the RAG complex on one immunoglobulin allele, acts by mediating a repositioning of the second allele to pericentromeric heterochromatin, preventing accessibility to the RAG complex and recombination of the second allele. Also involved in signal transduction and cell cycle control. May function as a tumor suppressor. Necessary for activation of ABL1 and SAPK. Phosphorylates DYRK2, CHEK2, p53/TP53, FANCD2, NFKBIA, BRCA1, CTIP, nibrin (NBN), TERF1, RAD9 and DCLRE1C. May play a role in vesicle and/or protein transport. Could play a role in T-cell development, gonad and neurological function. Plays a role in replication-dependent histone mRNA degradation. Binds DNA ends. Phosphorylation of DYRK2 in nucleus in response to genotoxic stress prevents its MDM2-mediated ubiquitination and subsequent proteasome degradation. Phosphorylates ATF2 which stimulates its function in DNA damage response.
Cellular Location Nucleus. Cytoplasmic vesicle Note=Primarily nuclear. Found also in endocytic vesicles in association with beta-adaptin.
Tissue Location Found in pancreas, kidney, skeletal muscle, liver, lung, placenta, brain, heart, spleen, thymus, testis, ovary, small intestine, colon and leukocytes
Research Areas
Citations (0)

Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abgent to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.

Submit your citation using an Abgent antibody to, and receive a free "I Love Antibodies" mug.


ATM is a nuclear phosphoprotein involved in Ataxia-telangiectasia (A-T) an autosomal recessive disorder characterized by cerebellar ataxia, immune deficiencies, increased cancer predisposition, chromosomal instability and radiation sensitivity (1-2). This large protein (370 kDa) is involved in genome stability, cellular responses to DNA damage and cell cycle control. Autophosphorylation at serine 1981 on ATM is required during ATM kinase activation initiated by double strand breaks in the genome. After serine 1981 autophosphorylation, ATM phosphorylates downstream proteins (e.g. p53, Chk2), leading to cell cycle arrest and DNA repair (3). More than 100 mutations have been identified so far and are expected to inactivate the ATM protein by truncation or large deletions (4). Defects in ATM contribute to various B-cell and T-cell leukemias (5).


1. Harnden, D.G.; Int. J. Radiat. Biol. 66:S13-S19, 1994.
2. Lavin MF, Shiloh,Y. Ann. Rev. Imm. 15:177-202, 1997
3. Goldstine JV, et al. DNA Repair, 5:432-443, 2006.
4. Savitsky K et al. Hum. Mol. Gen. 4:2025-2032, 1995.
5. Stankovic al. Lancet 353:26-29., 1999.

Abgent welcomes feedback from its customers.

If you have used an Abgent product and would like to share how it has performed, please click on the "Submit Review" button and provide the requested information. Our staff will examine and post your review and contact you if needed.

If you have any additional inquiries please email technical services at

Cat# AJ1066b
Alternative Products:

Ordering Information

United States
AlbaniaAustraliaAustriaBelgiumBosnia & HerzegovinaBrazilBulgariaCanadaCentral AmericaChinaCroatiaCyprusCzech RepublicDenmarkEstoniaFinlandFranceGermanyGreeceHong KongHungaryIcelandIndiaIndonesiaIrelandIsraelItalyJapanLatviaLithuaniaLuxembourgMacedoniaMalaysiaMaltaNetherlandsNew ZealandNorwayPakistanPolandPortugalRomaniaSerbiaSingaporeSlovakiaSloveniaSouth AfricaSouth KoreaSpainSwedenSwitzerlandTaiwanTurkeyUnited KingdomUnited StatesVietnamWorldwideOthers
Abgent, Inc.
(888) 735-7227 / (858) 622-0099
(858) 622-0609
USA Headquarters
(888) 735-7227 / (858) 622-0099 or (858) 875-1900

Shipping Information

Domestic orders (in stock items)
Shipped out the same day. Orders placed after 1 PM (PST) will ship out the next business day.
International orders
Contact your local distributors
Terms & Conditions