• Product name
  • Description
    Rabbit polyclonal to SRP1
  • Host species
  • Specificity
    ab105346 is predicted not to cross-react with other KPNA family members.
  • Tested applications
    Suitable for: ICC/IF, WB, ICCmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    A 15 amino acid synthetic peptide from near the N terminus of Human SRP1 (NP_002255).

  • Positive control
    • HeLa cell lysate



Our Abpromise guarantee covers the use of ab105346 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
ICC/IF Use a concentration of 20 µg/ml.
WB Use a concentration of 1 - 2 µg/ml. Predicted molecular weight: 60 kDa.
ICC Use a concentration of 2.5 µg/ml.


  • Function
    Functions in nuclear protein import as an adapter protein for nuclear receptor KPNB1. Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Docking of the importin/substrate complex to the nuclear pore complex (NPC) is mediated by KPNB1 through binding to nucleoporin FxFG repeats and the complex is subsequently translocated through the pore by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to importin-beta and the three components separate and importin-alpha and -beta are re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus. In vitro, mediates the nuclear import of human cytomegalovirus UL84 by recognizing a non-classical NLS.
  • Tissue specificity
    Expressed ubiquitously.
  • Sequence similarities
    Belongs to the importin alpha family.
    Contains 10 ARM repeats.
    Contains 1 IBB domain.
  • Domain
    Consists of an N-terminal hydrophilic region, a hydrophobic central region composed of 10 repeats, and a short hydrophilic C-terminus. The N-terminal hydrophilic region contains the importin beta binding domain (IBB domain), which is sufficient for binding importin beta and essential for nuclear protein import.
    The IBB domain is thought to act as an intrasteric autoregulatory sequence by interacting with the internal autoinhibitory NLS. Binding of KPNB1 probably overlaps the internal NLS and contributes to a high affinity for cytoplasmic NLS-containing cargo substrates. After dissociation of the importin/substrate complex in the nucleus the internal autohibitory NLS contributes to a low affinity for nuclear NLS-containing proteins.
    The major and minor NLS binding sites are mainly involved in recognition of simple or bipartite NLS motifs. Structurally located within in a helical surface groove they contain several conserved Trp and Asn residues of the corresponding third helices (H3) of ARM repeats which mainly contribute to binding.
  • Post-translational
    Polyubiquitinated in the presence of RAG1 (in vitro).
  • Cellular localization
    Cytoplasm. Nucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • IMA5_HUMAN antibody
    • Importin alpha 1 subunit antibody
    • Importin alpha 5 antibody
    • Importin alpha S1 antibody
    • Importin subunit alpha-5, N-terminally processed antibody
    • IPO A5 antibody
    • IPOA 5 antibody
    • IPOA5 antibody
    • Karyopherin alpha 1 antibody
    • Karyopherin alpha 1 subunit antibody
    • Karyopherin subunit alpha-1 antibody
    • KPNA 1 antibody
    • KPNA1 antibody
    • mSRP 1 antibody
    • mSRP1 antibody
    • NPI 1 antibody
    • NPI-1 antibody
    • NPI1 antibody
    • Nucleoprotein interactor 1 antibody
    • RAG cohort protein 2 antibody
    • RCH 2 antibody
    • RCH2 antibody
    • Recombination activating gene cohort 2 antibody
    • SRP 1 antibody
    • SRP1 beta antibody
    • SRP1-beta antibody
    see all


  • Immunofluorescence of SRP1 in K562 cells with ab105346 at 20 ?g/mL.
  • Anti-SRP1 antibody (ab105346) at 1 µg/ml + HeLa cell lysate at 15 µg

    Predicted band size: 60 kDa

  • Immunocytochemistry of SRP1 in HeLa cells with ab105346 at 2.5 µg/ml


ab105346 has not yet been referenced specifically in any publications.

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