ABE389 | Anti-phospho-ATR (Ser428) Antibody

200 µL  
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      Key Spec Table

      Species ReactivityKey ApplicationsHostFormatAntibody Type
      H, MkWBRbAffinity PurifiedPolyclonal Antibody
      Catalogue NumberABE389
      DescriptionAnti-phospho-ATR (Ser428) Antibody
      Alternate Names
      • Serine/threonine-protein kinase ATR
      • Ataxia telangiectasia and Rad3-related protein
      • FRAP-related protein 1
      Background InformationThe Ataxia-Telangiectasia and Rad3 related kinase (ATR) is a nuclear serine/threonine kinase that is part of the "first-response" system to DNA damage induced by a wide variety of factors including double-stranded breaks and replication stress. The localization of ATR to sites of DNA damage is aided by the Replication Protein A (RPA). Phospho - ATR (Ser428) targets a number of proteins including BRCA1, WRN, CHEK1, MCM2, and p53/TP53, and coordinates signaling pathways involved in DNA repair and apoptosis. ATR may also be involved in the phosphorylation of the histone H2A.X after replication stress, an early marker of DNA damage. However, ATR also mediates DNA replication and fork stability in normal cell cycles by activation of Chk1. Defective ATR contributes to Seckel syndrome type 1.
      Product Information
      FormatAffinity Purified
      • UV irradiated HeLa cell lysates and UV irradiated COS1 cell lysates
      PresentationPurified rabbit polyclonal in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.
      ApplicationAnti-phospho-ATR (Ser428) Antibody is a rabbit polyclonal antibody for detection of phospho-ATR (Ser428) also known as Serine/threonine-protein kinase ATR, Ataxia telangiectasia & Rad3-related protein, has been validated in WB.
      Key Applications
      • Western Blotting
      Biological Information
      ImmunogenKLH-conjugated linear peptide corresponding to human ATR phosphorylated at (Ser428).
      EpitopePhosphorylated (Ser428)
      ConcentrationPlease refer to the Certificate of Analysis for the lot-specific concentration.
      SpecificityThis antibody recognizes ATR phosphorylated at (Ser428).
      Species Reactivity
      • Human
      • Monkey
      Species Reactivity NoteDemonstrated to react in Human and Monkey. Other homologies: (63% mouse sequence homology).
      Antibody TypePolyclonal Antibody
      Entrez Gene Number
      Entrez Gene SummaryThe protein encoded by this gene belongs the PI3/PI4-kinase family, and is most closely related to ATM, a protein kinase encoded by the gene mutated in ataxia telangiectasia. This protein and ATM share similarity with Schizosaccharomyces pombe rad3, a cell cycle checkpoint gene required for cell cycle arrest and DNA damage repair in response to DNA damage. This kinase has been shown to phosphorylate checkpoint kinase CHK1, checkpoint proteins RAD17, and RAD9, as well as tumor suppressor protein BRCA1. Mutations of this gene are associated with Seckel syndrome. An alternatively spliced transcript variant of this gene has been reported, however, its full length nature is not known. Transcript variants utilizing alternative polyA sites exist.
      Gene Symbol
      • ATR
      • FRP1
      Purification MethodAffinity Purfied
      UniProt Number
      UniProt SummaryFUNCTION: Serine/threonine protein kinase which activates checkpoint signaling upon genotoxic stresses such as ionizing radiation (IR), ultraviolet light (UV), or DNA replication stalling, thereby acting as a DNA damage sensor. Recognizes the substrate consensus sequence [ST]-Q. Phosphorylates BRCA1, CHEK1, MCM2, RAD17, RPA2, SMC1 and TP53/p53, which collectively inhibit DNA replication and mitosis and promote DNA repair, recombination and apoptosis. Phosphorylates 'Ser-139' of histone variant H2AX/H2AFX at sites of DNA damage, thereby regulating DNA damage response mechanism. Required for FANCD2 ubiquitination. Critical for maintenance of fragile site stability and efficient regulation of centrosome duplication.

      CATALYTIC ACTIVITY: ATP + a protein = ADP + a phosphoprotein.

      COFACTOR: Manganese.

      ENZYME REGULATION: Activated by DNA and inhibited by BCR-ABL oncogene. Slightly activated by ATRIP. Inhibited by caffeine, wortmannin and LY294002.

      SUBUNIT STRUCTURE: Forms an heterodimer with ATRIP. Binds to DNA, and to UV-damaged DNA with higher affinity. Interacts with RAD17, MSH2 and HDAC2. Present in a complex containing ATRIP and RPA-coated single-stranded DNA. Present in a complex containing CHD4 and HDAC2. Interacts with BCR-ABL after genotoxic stress. Interacts with EEF1E1. This interaction is enhanced by UV irradiation. Interacts with CLSPN and CEP164.

      SUBCELLULAR LOCATION: Nucleus. Note: Depending on the cell type, it can also be found in PML nuclear bodies. Recruited to chromatin during S-phase. Redistributes to discrete nuclear foci upon DNA damage, hypoxia or replication fork stalling.

      TISSUE SPECIFICITY: Ubiquitous, with highest expression in testis. Isoform 2 is found in pancreas, placenta and liver but not in heart, testis and ovary.

      PTM: Phosphorylated; autophosphorylates in vitro.

      INVOLVEMENT IN DISEASE: Defects in ATR are a cause of Seckel syndrome type 1 (SCKL1) [MIM:210600]. SCKL1 is a rare autosomal recessive disorder characterized by growth retardation, microcephaly with mental retardation, and a characteristic 'bird-headed' facial appearance.

      SEQUENCE SIMILARITIES: Belongs to the PI3/PI4-kinase family. ATM subfamily.

      Contains 1 FAT domain.

      Contains 1 FATC domain.

      Contains 2 HEAT repeats.

      Contains 1 PI3K/PI4K domain.
      Molecular Weight~260 kDa observed
      Physicochemical Information
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Safety Information
      Product Usage Statements
      Quality AssuranceEvaluated by Western Blot in UV irradiated HeLa cell lysates and UV irradiated COS1 cell lysates.

      Western Blot Analysis: A 1:200 dilution of this antibody detected ATR on 10 µg of UV irradiated HeLa cell lysates and UV irradiated COS1 cell lysates.
      Usage Statement
      • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
      Storage and Shipping Information
      Storage ConditionsStable for 1 year at 2-8°C from date of receipt.
      Packaging Information
      Material Size200 µL
      Transport Information
      Supplemental Information

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      Life Science Research > Antibodies and Assays > Primary Antibodies