Recombinant human cAMP Protein Kinase Catalytic subunit (ab56268)


  • Product name
    Recombinant human cAMP Protein Kinase Catalytic subunit
  • Protein length
    Full length protein


  • Nature
  • Source
    Baculovirus infected Sf9 cells
  • Amino Acid Sequence
    • Species

Associated products


Our Abpromise guarantee covers the use of ab56268 in the following tested applications.

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

  • Biological activity
    (Lot#U220-2) Specific activity 1914 nmol/min/mg (Lot#B207-1) Specific activity 141 nmol/min/mg
  • Applications


    Functional Studies

  • Form
  • Additional notes

    it is recommended to store ab56268 in glycerol at -80C to preserve its activity.

    ab204856 (CREB peptide) can be utilized as a substrate for assessing kinase activity

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on dry ice. Upon delivery aliquot and store at -80ºC. Avoid freeze / thaw cycles.

    Preservative: None
    Constituents: 25% Glycerol, 50mM Tris HCl, 150mM Sodium chloride, 0.25mM DTT, 0.1mM EGTA, 0.1mM EDTA, 0.1mM PMSF, pH 7.5

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

General Info

  • Alternative names
    • cAMP dependent protein kinase alpha catalytic subunit
    • cAMP dependent protein kinase beta catalytic subunit
    • cAMP dependent protein kinase catalytic beta subunit isoform 4ab
    • cAMP dependent protein kinase catalytic subunit alpha
    • cAMP dependent protein kinase catalytic subunit alpha, isoform 1
    • cAMP dependent protein kinase catalytic subunit beta
    • cAMP-dependent protein kinase catalytic subunit alpha
    • PKA C alpha
    • PKA C beta
    • PKA C-alpha
    • PKACA
    • PKACB
    • PPNAD4
    • PRKACA
    • PRKACB
    • Protein kinase A catalytic subunit
    • Protein kinase A catalytic subunit alpha
    • Protein kinase A catalytic subunit beta
    • Protein kinase, cAMP dependent, catalytic, alpha
    • Protein kinase, cAMP dependent, catalytic, beta
    see all
  • Function
    Phosphorylates a large number of substrates in the cytoplasm and the nucleus. Regulates the abundance of compartmentalized pools of its regulatory subunits through phosphorylation of PJA2 which binds and ubiquitinates these subunits, leading to their subsequent proteolysis. Phosphorylates CDC25B, ABL1, NFKB1, CLDN3, PSMC5/RPT6, PJA2, RYR2, RORA and VASP. RORA is activated by phosphorylation. Required for glucose-mediated adipogenic differentiation increase and osteogenic differentiation inhibition from osteoblasts. Involved in the regulation of platelets in response to thrombin and collagen; maintains circulating platelets in a resting state by phosphorylating proteins in numerous platelet inhibitory pathways when in complex with NF-kappa-B (NFKB1 and NFKB2) and I-kappa-B-alpha (NFKBIA), but thrombin and collagen disrupt these complexes and free active PRKACA stimulates platelets and leads to platelet aggregation by phosphorylating VASP. Prevents the antiproliferative and anti-invasive effects of alpha-difluoromethylornithine in breast cancer cells when activated. RYR2 channel activity is potentiated by phosphorylation in presence of luminal Ca(2+), leading to reduced amplitude and increased frequency of store overload-induced Ca(2+) release (SOICR) characterized by an increased rate of Ca(2+) release and propagation velocity of spontaneous Ca(2+) waves, despite reduced wave amplitude and resting cytosolic Ca(2+). PSMC5/RPT6 activation by phosphorylation stimulates proteasome. Negatively regulates tight junctions (TJs) in ovarian cancer cells via CLDN3 phosphorylation. NFKB1 phosphorylation promotes NF-kappa-B p50-p50 DNA binding. Involved in embryonic development by down-regulating the Hedgehog (Hh) signaling pathway that determines embryo pattern formation and morphogenesis. Prevents meiosis resumption in prophase-arrested oocytes via CDC25B inactivation by phosphorylation. May also regulate rapid eye movement (REM) sleep in the pedunculopontine tegmental (PPT). Phosphorylates APOBEC3G and AICDA. Isoform 2 phosphorylates and activates ABL1 in sperm flagellum to promote spermatozoa capacitation.
  • Tissue specificity
    Isoform 1 is ubiquitous. Isoform 2 is sperm-specific and is enriched in pachytene spermatocytes but is not detected in round spermatids.
  • Sequence similarities
    Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. cAMP subfamily.
    Contains 1 AGC-kinase C-terminal domain.
    Contains 1 protein kinase domain.
  • Post-translational
    Asn-3 is partially deaminated to Asp giving rise to 2 major isoelectric variants, called CB and CA respectively.
    Autophosphorylated. Phosphorylation is enhanced by vitamin K(2). Phosphorylated on threonine and serine residues. Phosphorylation on Thr-198 is required for full activity.
    Phosphorylated at Tyr-331 by activated receptor tyrosine kinases EGFR and PDGFR; this increases catalytic efficienncy.
  • Cellular localization
    Cytoplasm. Cell membrane. Nucleus. Mitochondrion. Translocates into the nucleus (monomeric catalytic subunit). The inactive holoenzyme is found in the cytoplasm. Distributed throughout the cytoplasm in meiotically incompetent oocytes. Associated to mitochondrion as meiotic competence is acquired. Aggregates around the germinal vesicles (GV) at the immature GV stage oocytes and Cell projection, cilium, flagellum. Expressed in the midpiece region of the sperm flagellum.
  • Information by UniProt


  • Kinase assay with ab56268 at a 0.1µg/µl dilution, Specific Activity 1914 nmol/min/mg.
  • ab56268 on SDS-PAGE.


This product has been referenced in:
  • Finocchietto PV  et al. Defective Leptin-AMP-Dependent Kinase Pathway Induces Nitric Oxide Release and Contributes to Mitochondrial Dysfunction and Obesity in ob/ob Mice. Antioxid Redox Signal : (2011). Read more (PubMed: 21529143) »

See 1 Publication for this product

Customer reviews and Q&As

There are currently no Customer reviews or Questions for ab56268.
Please use the links above to contact us or submit feedback about this product.


Sign up