Phospho-JNK/SAPK Antibody
Rabbit Polyclonal Antibody
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Application ![]()
| WB |
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Primary Accession | P45984 |
Other Accession | NP_001128516 |
Reactivity | Human, Mouse, Rat |
Host | Rabbit |
Clonality | Polyclonal |
Isotype | Rabbit IgG |
Calculated MW | 48139 Da |
Gene ID | 5601 |
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Application & Usage | Western blotting (1-2 µg/ml), immunoprecipitation (10-20 µg/ml), immunocytochemistry (10-20 µg/ml), and Immunohistochemistry (20-30 µg/ml). However, the optimal conditions should be determined individually. The antibody detects the p46 and p54 JNK/SAPK dually phosphorylated at Thr183 and Tyr185. |
Other Names | c-Jun kinase, JNK , JNK 1 , JAK1A , MAPK8 , MAPK 8 , SAPK 1 , SAPK1 , Kinase JNK1 , Stress activated protein kinase |
Target/Specificity | Phospho-JNK/SAPK |
Antibody Form | Liquid |
Appearance | Colorless liquid |
Formulation | 100 µg (0.5 mg/ml) affinity purified rabbit anti-phospho-JNK/SAPK polyclonal antibody in phosphate buffered saline (PBS), pH 7.2, containing 50% glycerol, 1% BSA, 0.02% sodium azide. |
Handling | The antibody solution should be gently mixed before use. |
Reconstitution & Storage | -20 °C |
Background Descriptions | |
Precautions | Phospho-JNK/SAPK Antibody is for research use only and not for use in diagnostic or therapeutic procedures. |
Name | MAPK9 |
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Synonyms | JNK2, PRKM9, SAPK1A |
Function | Serine/threonine-protein kinase involved in various processes such as cell proliferation, differentiation, migration, transformation and programmed cell death (PubMed:10376527, PubMed:15805466, PubMed:17525747, PubMed:19675674, PubMed:20595622, PubMed:21364637, PubMed:22441692, PubMed:34048572). Extracellular stimuli such as pro- inflammatory cytokines or physical stress stimulate the stress- activated protein kinase/c-Jun N-terminal kinase (SAP/JNK) signaling pathway. In this cascade, two dual specificity kinases MAP2K4/MKK4 and MAP2K7/MKK7 phosphorylate and activate MAPK9/JNK2 (PubMed:10376527, PubMed:15805466, PubMed:17525747, PubMed:19675674, PubMed:20595622, PubMed:21364637, PubMed:22441692, PubMed:34048572). In turn, MAPK9/JNK2 phosphorylates a number of transcription factors, primarily components of AP-1 such as JUN and ATF2 and thus regulates AP-1 transcriptional activity (PubMed:10376527). In response to oxidative or ribotoxic stresses, inhibits rRNA synthesis by phosphorylating and inactivating the RNA polymerase 1-specific transcription initiation factor RRN3 (PubMed:15805466). Promotes stressed cell apoptosis by phosphorylating key regulatory factors including TP53 and YAP1 (PubMed:17525747, PubMed:21364637). In T-cells, MAPK8 and MAPK9 are required for polarized differentiation of T-helper cells into Th1 cells (PubMed:19290929). Upon T-cell receptor (TCR) stimulation, is activated by CARMA1, BCL10, MAP2K7 and MAP3K7/TAK1 to regulate JUN protein levels (PubMed:19290929). Plays an important role in the osmotic stress- induced epithelial tight-junctions disruption (PubMed:20595622). When activated, promotes beta-catenin/CTNNB1 degradation and inhibits the canonical Wnt signaling pathway (PubMed:19675674). Also participates in neurite growth in spiral ganglion neurons (By similarity). Phosphorylates the CLOCK-BMAL1 heterodimer and plays a role in the regulation of the circadian clock (PubMed:22441692). Phosphorylates POU5F1, which results in the inhibition of POU5F1's transcriptional activity and enhances its proteasomal degradation (By similarity). Phosphorylates ALKBH5 in response to reactive oxygen species (ROS), promoting ALKBH5 sumoylation and inactivation (PubMed:34048572). |
Cellular Location | Cytoplasm. Nucleus. Note=Colocalizes with POU5F1 in the nucleus. {ECO:0000250|UniProtKB:Q9WTU6} |

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Provided below are standard protocols that you may find useful for product applications.
Background
The JNK pathway is activated by largely distinct stimuli including inflammatory cytokines (such as TNF-α and IL-1), UV light, inhibitors of protein synthesis and osmotic stress. Activated MEKK1 phosphorylates SEK1 (also known as MKK4), which in turn activates SAPK (also known as JNK). JNK binds tightly to the N-terminal region of c-Jun and ATF-2, and phosphorylates c-Jun at Ser63 and Ser73 and ATF-2 at Thr69 and Thr71.

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