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MAPK3 Antibody (N-term)

Rabbit Monoclonal Antibody

  • WB - MAPK3 Antibody (N-term) AJ1458a
    A. Western blot analysis on Jurkat cell lysate using anti-p44 MAPK (Erk1) (N-term) RabMAb (Cat. #AJ1458a); dilution 1:1,000.
  • IHC - MAPK3 Antibody (N-term) AJ1458a
    B. Immunohistochemical analysis of paraffin-embedded lung carcinoma using anti-p44 MAPK (Erk1) (N-term) RabMAb (Cat. #AJ1458a).
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession P27361
Reactivity Human
Host Rabbit
Clonality Monoclonal
Clone Names Y72
Calculated MW 43136 Da
Gene ID 5595
Other Names Mitogen-activated protein kinase 3, MAP kinase 3, MAPK 3, ERT2, Extracellular signal-regulated kinase 1, ERK-1, Insulin-stimulated MAP2 kinase, MAP kinase isoform p44, p44-MAPK, Microtubule-associated protein 2 kinase, p44-ERK1, MAPK3, ERK1, PRKM3
Target/Specificity A synthetic peptide corresponding to residues near N-terminus of human ERK1 was used as immunogen. The antibody does not cross-react with other MAP kinases.
Dilution WB~~1:10000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsMAPK3 Antibody (N-term) is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name MAPK3
Synonyms ERK1, PRKM3
Function Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. MAPK1/ERK2 and MAPK3/ERK1 are the 2 MAPKs which play an important role in the MAPK/ERK cascade. They participate also in a signaling cascade initiated by activated KIT and KITLG/SCF. Depending on the cellular context, the MAPK/ERK cascade mediates diverse biological functions such as cell growth, adhesion, survival and differentiation through the regulation of transcription, translation, cytoskeletal rearrangements. The MAPK/ERK cascade plays also a role in initiation and regulation of meiosis, mitosis, and postmitotic functions in differentiated cells by phosphorylating a number of transcription factors. About 160 substrates have already been discovered for ERKs. Many of these substrates are localized in the nucleus, and seem to participate in the regulation of transcription upon stimulation. However, other substrates are found in the cytosol as well as in other cellular organelles, and those are responsible for processes such as translation, mitosis and apoptosis. Moreover, the MAPK/ERK cascade is also involved in the regulation of the endosomal dynamics, including lysosome processing and endosome cycling through the perinuclear recycling compartment (PNRC); as well as in the fragmentation of the Golgi apparatus during mitosis. The substrates include transcription factors (such as ATF2, BCL6, ELK1, ERF, FOS, HSF4 or SPZ1), cytoskeletal elements (such as CANX, CTTN, GJA1, MAP2, MAPT, PXN, SORBS3 or STMN1), regulators of apoptosis (such as BAD, BTG2, CASP9, DAPK1, IER3, MCL1 or PPARG), regulators of translation (such as EIF4EBP1) and a variety of other signaling-related molecules (like ARHGEF2, FRS2 or GRB10). Protein kinases (such as RAF1, RPS6KA1/RSK1, RPS6KA3/RSK2, RPS6KA2/RSK3, RPS6KA6/RSK4, SYK, MKNK1/MNK1, MKNK2/MNK2, RPS6KA5/MSK1, RPS6KA4/MSK2, MAPKAPK3 or MAPKAPK5) and phosphatases (such as DUSP1, DUSP4, DUSP6 or DUSP16) are other substrates which enable the propagation the MAPK/ERK signal to additional cytosolic and nuclear targets, thereby extending the specificity of the cascade.
Cellular Location Cytoplasm. Nucleus. Note=Autophosphorylation at Thr-207 promotes nuclear localization
Research Areas
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p44 MAP Kinase (Erk1) is a member of a family of mitogen-activated protein kinases that participate in diverse cellular functions, including the regulation of cell growth and differentiation (1,2). Erk1 regulates meiosis and mitosis by phosphorylating a number of transcription factors such as ELK-1. Activation of Erk1 occurs through phosphorylation of threonine 202 and tyrosine 204 (of human MAP kinase) (3). Erk1 is also known to autophosphorylate on tyrosine (3).


1. Charest, D.L, et al. Molecular cloning, expression, and characterization of the human mitogen-activated protein kinase p44erk1. Mol Cell Biol. 13: 4679
2. Marshall, C.J. Specificity of receptor tyrosine kinase signaling: transient versus sustained extracellular signal-regulated kinase activation. Cell 80: 179
3. Payne, D.M., et al. Identification of the regulatory phosphorylation sites in pp42/mitogen-activated protein kinase (MAP kinase). EMBO J. 10: 885

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Cat# AJ1458a
(40 western blots)
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