• Product nameAnti-SFPQ antibody
    See all SFPQ primary antibodies
  • Description
    Rabbit polyclonal to SFPQ
  • Tested applicationsSuitable for: ELISA, WB, IHC-Pmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Cow
  • Immunogen

    A region within synthetic peptide: KPGGGPGLST PGGHPKPPHR GGGEPRGGRQ HHPPYHQQHH QGPPPGGPGG, corresponding to N terminal amino acids 217-266 of Human SFPQ

  • Positive control
    • HepG2 cell lysate and Human skin and intestinal tissue.


  • FormLiquid
  • Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.
  • Storage bufferPreservative: None
    Constituents: 2% Sucrose, PBS
  • Concentration information loading...
  • PurityProtein A purified
  • ClonalityPolyclonal
  • IsotypeIgG
  • Research areas


Our Abpromise guarantee covers the use of ab50935 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
ELISA Use at an assay dependent concentration.

Titre using peptide based assay: 1:12500.

WB Use a concentration of 1.25 µg/ml. Detects a band of approximately 77 kDa (predicted molecular weight: 76 kDa). Good results were obtained when blocked with 5% non-fat dry milk in 0.05% PBS-T.
IHC-P Use a concentration of 4 - 8 µg/ml.


  • FunctionDNA- and RNA binding protein, involved in several nuclear processes. Essential pre-mRNA splicing factor required early in spliceosome formation and for splicing catalytic step II, probably as an heteromer with NONO. Binds to pre-mRNA in spliceosome C complex, and specifically binds to intronic polypyrimidine tracts. Interacts with U5 snRNA, probably by binding to a purine-rich sequence located on the 3' side of U5 snRNA stem 1b. May be involved in a pre-mRNA coupled splicing and polyadenylation process as component of a snRNP-free complex with SNRPA/U1A. The SFPQ-NONO heteromer associated with MATR3 may play a role in nuclear retention of defective RNAs. SFPQ may be involved in homologous DNA pairing; in vitro, promotes the invasion of ssDNA between a duplex DNA and produces a D-loop formation. The SFPQ-NONO heteromer may be involved in DNA unwinding by modulating the function of topoisomerase I/TOP1; in vitro, stimulates dissociation of TOP1 from DNA after cleavage and enhances its jumping between separate DNA helices. The SFPQ-NONO heteromer may be involved in DNA nonhomologous end joining (NHEJ) required for double-strand break repair and V(D)J recombination and may stabilize paired DNA ends; in vitro, the complex strongly stimulates DNA end joining, binds directly to the DNA substrates and cooperates with the Ku70/G22P1-Ku80/XRCC5 (Ku) dimer to establish a functional preligation complex. SFPQ is involved in transcriptional regulation. Transcriptional repression is probably mediated by an interaction of SFPQ with SIN3A and subsequent recruitment of histone deacetylases (HDACs). The SFPQ-NONO/SF-1 complex binds to the CYP17 promoter and regulates basal and cAMP-dependent transcriptional avtivity. SFPQ isoform Long binds to the DNA binding domains (DBD) of nuclear hormone receptors, like RXRA and probably THRA, and acts as transcriptional corepressor in absence of hormone ligands. Binds the DNA sequence 5'-CTGAGTC-3' in the insulin-like growth factor response element (IGFRE) and inhibits IGF-I-stimulated transcriptional activity.
  • Involvement in diseaseNote=A chromosomal aberration involving SFPQ may be a cause of papillary renal cell carcinoma (PRCC). Translocation t(X;1)(p11.2;p34) with TFE3.
  • Sequence similaritiesContains 2 RRM (RNA recognition motif) domains.
  • Post-translational
    The N-terminus is blocked.
    Phosphorylated on multiple serine and threonine residues during apoptosis. In vitro phosphorylated by PKC. Phosphorylation stimulates binding to DNA and D-loop formation, but inhibits binding to RNA.
    Arg-7, Arg-9, Arg-19 and Arg-25 are dimethylated, probably to asymmetric dimethylarginine.
  • Cellular localizationNucleus matrix. Predominantly in nuclear matrix.
  • Information by UniProt
  • Database links
  • Alternative names
    • 100 kDa DNA pairing protein antibody
    • 100 kDa DNA-pairing protein antibody
    • 100 kDa subunit antibody
    • DNA binding p52/p100 complex 100 kDa subunit antibody
    • DNA-binding p52/p100 complex antibody
    • hPOMp100 antibody
    • Polypyrimidine tract binding protein associated splicing factor antibody
    • Polypyrimidine tract-binding protein-associated-splicing factor antibody
    • POMP100 antibody
    • PPP1R140 antibody
    • proline- and glutamine-rich antibody
    • Protein phosphatase 1 regulatory subunit 140 antibody
    • PSF antibody
    • PTB associated splicing factor antibody
    • PTB-associated-splicing factor antibody
    • Sfpq antibody
    • SFPQ_HUMAN antibody
    • Splicing factor antibody
    • Splicing factor proline and glutamine rich antibody
    • Splicing factor proline/glutamine rich (polypyrimidine tract binding protein associated) antibody
    • Splicing factor proline/glutamine rich antibody
    see all

Anti-SFPQ antibody images

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human heart tissue labelling SFPQ with ab50935 at 4.0-8.0µg/ml. Positive staining shown in cardiac cells. Magnification: 400X.
  • Anti-SFPQ antibody (ab50935) at 1.25 µg/ml + HepG2 cell lysate at 10 µg

    HRP conjugated anti-Rabbit IgG at 1/50000 dilution

    Predicted band size : 76 kDa
    Observed band size : 77 kDa (why is the actual band size different from the predicted?)
  • ab50935 at 4ug/ml staining human SFPQ in epithelial cells of human intestinal villus by Immunohistochemistry, Paraffin embedded tissue.ab50935 at 4ug/ml staining human SFPQ in epithelial cells of human intestinal villus by Immunohistochemistry, Paraffin embedded tissue.
  • ab50935 at 4ug/ml staining human SFPQ in squamous epithelial cells of human skin by Immunohistochemistry, Paraffin embedded tissue.ab50935 at 4ug/ml staining human SFPQ in squamous epithelial cells of human skin by Immunohistochemistry, Paraffin embedded tissue.

References for Anti-SFPQ antibody (ab50935)

ab50935 has not yet been referenced specifically in any publications.

Product Wall

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Western blot
Sample Human Cell lysate - whole cell (Hela)
Loading amount 15 µg
Specification Hela
Gel Running Conditions Reduced Denaturing
Blocking step Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 25°C

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Submitted Jul 10 2007