• Product name

    Recombinant human PIN4 protein
    See all PIN4 proteins and peptides
  • Biological activity

    Specific activity is > 300 nmoles/min/mg, and is defined as the amount of enzyme that cleaves 1 µmole of suc-AAFP-pNA per minute at 25°C in Tris-Hcl pH8.0 using chymotrypsin.

    Activity Assay

    1. Prepare 170 µl assay buffer into a suitable container and pre-chill on ice before use: The final concentrations are 200 mM Tris-Hcl, pH 8.0, and 20nM chymotrypsin.
    2. Add 10 µl of recombinant PIN4 protein with 1 µg in assay buffer.
    3. Mix by inversion and equilibrate to 1°C and monitor the A405nm until the value is constant using a spectrophotometer.
    4. Add 20 µl pre-chilled 5mM suc-AAFP-pNA. (Substrate was dissolved in TFE that contained 460mM LiCl to a concentration of 3 mM)
    5. Record the increase in A405 nm for 30 minutes at 25°C.
  • Purity

    > 85 % SDS-PAGE.
    ab105618 was purified using conventional chromatography.
  • Expression system

    Escherichia coli
  • Accession

  • Protein length

    Full length protein
  • Animal free

  • Nature

    • Species

    • Sequence

    • Predicted molecular weight

      19 kDa including tags
    • Amino acids

      1 to 156
    • Tags

      His tag N-Terminus


Our Abpromise guarantee covers the use of ab105618 in the following tested applications.

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

  • Applications

    Functional Studies


    Mass Spectrometry

  • Mass spectrometry

  • Form

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.

    pH: 8.00
    Constituents: 0.00174% PMSF, 0.0154% DTT, 0.316% Tris HCl, 10% Glycerol

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

General Info

  • Alternative names

    • EPVH
    • Eukaryotic parvulin homolog
    • hEPVH
    • hPar14
    • hPar17
    • MGC138486
    • OTTHUMP00000023527
    • OTTHUMP00000217483
    • OTTHUMP00000217485
    • Par14
    • Par17
    • Parvulin 14
    • Parvulin-14
    • Parvulin-17
    • Peptidyl prolyl cis trans isomerase NIMA interacting 4
    • Peptidyl prolyl cis/trans isomerase EPVH
    • Peptidyl-prolyl cis-trans isomerase NIMA-interacting 4
    • Peptidyl-prolyl cis-trans isomerase PIN4
    • Peptidyl-prolyl cis/trans isomerase EPVH
    • PIN4
    • PIN4_HUMAN
    • PPIase Pin4
    • Protein (peptidylprolyl cis/trans isomerase) NIMA interacting, 4 (parvulin)
    • Rotamase Pin4
    see all
  • Function

    Isoform 1 is involved as a ribosomal RNA processing factor in ribosome biogenesis. Binds to tightly bent AT-rich stretches of double-stranded DNA.
    Isoform 2 binds to double-stranded DNA.
  • Tissue specificity

    Isoform 2 is much more stable than isoform 1 (at protein level). Ubiquitous. Isoform 1 and isoform 2 are expressed in kidney, liver, blood vessel, brain, mammary gland, skeletal muscle, small intestine and submandibularis. Isoform 1 transcripts are much more abundant than isoform 2 in each tissue analyzed.
  • Sequence similarities

    Belongs to the ppiC/parvulin rotamase family. PIN4 subfamily.
    Contains 1 PpiC domain.
  • Domain

    The PPIase domain enhances mitochondrial targeting.
  • Post-translational

    Phosphorylated. Isoform 1 phosphorylation occurs both in the nucleus and the cytoplasm. Isoform 1 phosphorylation at Ser-19 does not affect its PPIase activity but is required for nuclear localization, and the dephosphorylation is a prerequisite for the binding to DNA. The unphosphorylated isoform 1 associates with the pre-rRNP complexes in the nucleus.
    Isoform 2 is sumoylated by SUMO2 and SUMO3.
  • Cellular localization

    Mitochondrion. Mitochondrion matrix. Imported in a time- and membrane potential-dependent manner to the mitochondrial matrix, but without concomitant processing of the protein. Directed to mitochondria by a novel N-terminal domain that functions as non-cleavable mitochondrial targeting peptide and Nucleus > nucleolus. Cytoplasm > cytoskeleton > spindle. Cytoplasm. Colocalizes in the nucleolus during interphase and on the spindle apparatus during mitosis with NPM1.
  • Information by UniProt


  • 15% SDS-PAGE analysis of 3µg ab105618.


ab105618 has not yet been referenced specifically in any publications.

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