Anti-Nucleophosmin (phospho S125) antibody [EPR1856] (ab109546)


  • Product nameAnti-Nucleophosmin (phospho S125) antibody [EPR1856]
    See all Nucleophosmin primary antibodies
  • Description
    Rabbit monoclonal [EPR1856] to Nucleophosmin (phospho S125)
  • SpecificityDetects Nucleophosmin only if phosphorylated at Serine 125.
  • Tested applicationsSuitable for: Flow Cyt, WB, IP, IHC-P, ICCmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Phospho-peptide corresponding to residues surrounding Serine 125 of Human Nucleophosmin

  • Positive control
    • WB: HeLa cell lysate IHC-P: Human breast or kidney tissue
  • General notes

    This product is a recombinant rabbit monoclonal antibody.

    Produced using Abcam’s RabMAb® technology. RabMAb® technology is covered by the following U.S. Patents, No. 5,675,063 and/or 7,429,487.


  • FormLiquid
  • Storage instructionsShipped at 4°C. Store at -20°C. Stable for 12 months at -20°C.
  • Storage bufferPBS 49%,Sodium azide 0.01%,Glycerol 50%,BSA 0.05%
  • PurityTissue culture supernatant
  • ClonalityMonoclonal
  • Clone numberEPR1856
  • IsotypeIgG
  • Research areas


Our Abpromise guarantee covers the use of ab109546 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Flow Cyt 1/100. ab172730-Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.
WB 1/10000 - 1/50000. Predicted molecular weight: 33 kDa.
IP 1/10 - 1/100.
IHC-P 1/100 - 1/250. Perform heat mediated antigen retrieval via the pressure cooker method before commencing with IHC staining protocol. Heat up to 98 degrees C, below boiling, and then let cool for 10-20 min.
ICC 1/50 - 1/100.


  • FunctionInvolved in diverse cellular processes such as ribosome biogenesis, centrosome duplication, protein chaperoning, histone assembly, cell proliferation, and regulation of tumor suppressors p53/TP53 and ARF. Binds ribosome presumably to drive ribosome nuclear export. Associated with nucleolar ribonucleoprotein structures and bind single-stranded nucleic acids. Acts as a chaperonin for the core histones H3, H2B and H4. Stimulates APEX1 endonuclease activity on apurinic/apyrimidinic (AP) double-stranded DNA but inhibits APEX1 endonuclease activity on AP single-stranded RNA. May exert a control of APEX1 endonuclease activity within nucleoli devoted to repair AP on rDNA and the removal of oxidized rRNA molecules. In concert with BRCA2, regulates centrosome duplication. Regulates centriole duplication: phosphorylation by PLK2 is able to trigger centriole replication. Negatively regulates the activation of EIF2AK2/PKR and suppresses apoptosis through inhibition of EIF2AK2/PKR autophosphorylation. Antagonizes the inhibitory effect of ATF5 on cell proliferation and relieves ATF5-induced G2/M blockade (PubMed:22528486).
  • Involvement in diseaseA chromosomal aberration involving NPM1 is found in a form of non-Hodgkin lymphoma. Translocation t(2;5)(p23;q35) with ALK. The resulting chimeric NPM1-ALK protein homodimerize and the kinase becomes constitutively activated.
    A chromosomal aberration involving NPM1 is found in a form of acute promyelocytic leukemia. Translocation t(5;17)(q32;q11) with RARA.
    A chromosomal aberration involving NPM1 is a cause of myelodysplastic syndrome (MDS). Translocation t(3;5)(q25.1;q34) with MLF1.
    Defects in NPM1 are associated with acute myelogenous leukemia (AML). Mutations in exon 12 affecting the C-terminus of the protein are associated with an aberrant cytoplasmic location.
  • Sequence similaritiesBelongs to the nucleoplasmin family.
  • Post-translational
    Acetylated at C-terminal lysine residues, thereby increasing affinity to histones.
    Phosphorylated at Ser-4 by PLK1 and PLK2. Phosphorylation at Ser-4 by PLK2 in S phase is required for centriole duplication and is sufficient to trigger centriole replication. Phosphorylation at Ser-4 by PLK1 takes place during mitosis. Phosphorylated by CDK2 at Ser-125 and Thr-199. Phosphorylation at Thr-199 may trigger initiation of centrosome duplication. Phosphorylated by CDK1 at Thr-199, Thr-219, Thr-234 and Thr-237 during cell mitosis. When these four sites are phosphorated, RNA-binding activity seem to be abolished. May be phosphorylated at Ser-70 by NEK2. The Thr-199 phosphorylated form has higher affinity for ROCK2. CDK6 triggers Thr-199 phosphorylation when complexed to Kaposi's sarcoma herpesvirus (KSHV) V-cyclin, leading to viral reactivation by reducing viral LANA levels.
    Sumoylated by ARF.
  • Cellular localizationNucleus, nucleolus. Nucleus, nucleoplasm. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome. Generally nucleolar, but is translocated to the nucleoplasm in case of serum starvation or treatment with anticancer drugs. Has been found in the cytoplasm in patients with primary acute myelogenous leukemia (AML), but not with secondary AML. Can shuttle between cytoplasm and nucleus. Co- localizes with the methylated form of RPS10 in the granular component (GC) region of the nucleolus. Colocalized with nucleolin and APEX1 in nucleoli. Isoform 1 of NEK2 is required for its localization to the centrosome during mitosis.
  • Information by UniProt
  • Database links
  • Alternative names
    • B23 antibody
    • MGC104254 antibody
    • NO38 antibody
    • NPM antibody
    • NPM_HUMAN antibody
    • NPM1 antibody
    • Nucleolar phosphoprotein B23 antibody
    • Nucleolar protein NO38 antibody
    • Nucleophosmin (nucleolar phosphoprotein B23 numatrin) antibody
    • Nucleophosmin antibody
    • nucleophosmin nucleoplasmin family member 1 antibody
    • Nucleophosmin/nucleoplasmin family member 1 antibody
    • Numatrin antibody
    • OTTHUMP00000161024 antibody
    • OTTHUMP00000161025 antibody
    • OTTHUMP00000223397 antibody
    • OTTHUMP00000223398 antibody
    see all

Anti-Nucleophosmin (phospho S125) antibody [EPR1856] images

  • Overlay histogram showing HeLa cells stained with ab109546 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab109546, 1/100 dilution) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-rabbit IgG (H+L) (ab150077) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter.
  • All lanes : Anti-Nucleophosmin (phospho S125) antibody [EPR1856] (ab109546) at 1/10000 dilution

    Lane 1 : HeLa cell lysate
    Lane 2 : HeLa cell lysate treated with Alkaline Phosphatase

    Lysates/proteins at 10 µg per lane.

    Predicted band size : 33 kDa
  • ab109546, at a 1/100 dilution, staining Nucleophosmin in formailn-fixed, paraffin-embedded Human breast tissue.
  • ab109546, at a 1/100 dilution, staining Nucleophosmin in formalin-fixed, paraffin-embedded Human kidney tissue.

References for Anti-Nucleophosmin (phospho S125) antibody [EPR1856] (ab109546)

This product has been referenced in:
  • Booth DG  et al. Ki-67 is a PP1-interacting protein that organises the mitotic chromosome periphery. Elife 3:e01641 (2014). ICC/IF ; Human . Read more (PubMed: 24867636) »

See 1 Publication for this product

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