Phospho-JUN (Ser63) Antibody

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Description

Antibody Characteristics

Phospho-JUN (Ser63) antibodies are polyclonal, rabbit-derived IgG antibodies designed to recognize c-Jun exclusively when phosphorylated at Ser63. Key features include:

PropertyProteintech 28907-1-AP St. John’s Labs STJ90173
Host SpeciesRabbitRabbit
Tested ReactivityHumanHuman, Mouse, Rat
ApplicationsWB, ELISAIF, WB, IHC, ELISA
Recommended DilutionWB: 1:500–1:1000WB: 1:500–1:2000; IF: 1:50–200
ImmunogenPeptide Predict (reactive species)Synthesized peptide (31–80 aa)
Molecular WeightObserved: 40–45 kDaNot explicitly stated
Storage-20°C in PBS with 50% glycerol-20°C in PBS with 50% glycerol, 0.5% BSA

These antibodies exhibit specificity validated through peptide-blocking assays, ensuring recognition only when Ser63 is phosphorylated .

Biological Context of c-Jun and Ser63 Phosphorylation

c-Jun, encoded by the JUN gene (UniProt: P05412), is a proto-oncoprotein forming AP-1 transcription factor dimers. Phosphorylation at Ser63 enhances its transcriptional activity, influencing processes like:

  • Cell proliferation and apoptosis

  • Tumorigenesis

  • Inflammatory responses .

Mechanistic Insights:

  • Ser63 phosphorylation is mediated by JNK isoforms (e.g., in response to anisomycin or TNFα) and ERK1/2 (e.g., in response to TPA or EGF) .

  • Post-translational modifications (e.g., phosphorylation by GSK3β or PLK3) regulate c-Jun’s DNA-binding affinity and stability .

A. Key Findings Using Phospho-JUN (Ser63) Antibodies

  • Signaling Pathway Analysis:

    • In RAW macrophages and fibroblasts, JNK isoforms phosphorylate Ser63 during LPS or anisomycin-induced stress .

    • ERK1/2 mediates Ser63 phosphorylation in phorbol ester (TPA)-treated fibroblasts .

  • Functional Studies:

    • Phosphorylated c-Jun binds AP-1 consensus motifs (5’-TGA[CG]TCA-3’), activating genes involved in apoptosis (e.g., FASLG) and steroidogenesis .

B. Quantitative Assays

The Meso Scale Discovery (MSD) platform employs this antibody for quantitative phospho-c-Jun detection, offering advantages over traditional Western blotting:

  • Dynamic Range: Linear detection across lysate titrations (0.63–10 µg) .

  • Specificity: Minimal cross-reactivity with non-phosphorylated c-Jun .

Technical Considerations

ParameterDetails
Sample CompatibilityWhole cell lysates, tissue extracts (human, mouse, rat)
Positive ControlsAnisomycin-treated NIH/3T3 cells ; UV-irradiated cells
Cross-Reactivity NotesNo detectable binding to non-phosphorylated c-Jun or other AP-1 subunits .

Limitations and Ethical Notes

  • Strictly Research Use: Not validated for diagnostic or therapeutic applications .

  • Species Restrictions: Proteintech’s version is limited to human samples, whereas St. John’s Labs’ antibody supports broader reactivity .

Product Specs

Form
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Lead Time
Typically, we can ship your order within 1-3 business days after receiving it. Delivery timelines may vary depending on the chosen purchase method and your location. For specific delivery timeframes, please consult your local distributor.
Synonyms
Activator protein 1 antibody; AP 1 antibody; AP-1 antibody; AP1 antibody; cJun antibody; Enhancer Binding Protein AP1 antibody; Jun Activation Domain Binding Protein antibody; JUN antibody; Jun oncogene antibody; JUN protein antibody; Jun proto oncogene antibody; JUN_HUMAN antibody; JUNC antibody; Oncogene JUN antibody; p39 antibody; Proto oncogene c jun antibody; Proto oncogene cJun antibody; Proto-oncogene c-jun antibody; Transcription Factor AP 1 antibody; Transcription factor AP-1 antibody; Transcription Factor AP1 antibody; V jun avian sarcoma virus 17 oncogene homolog antibody; V jun sarcoma virus 17 oncogene homolog (avian) antibody; V jun sarcoma virus 17 oncogene homolog antibody; V-jun avian sarcoma virus 17 oncogene homolog antibody; vJun Avian Sarcoma Virus 17 Oncogene Homolog antibody
Target Names
JUN
Uniprot No.

Target Background

Function
Phospho-JUN (Ser63) Antibody is a transcription factor that recognizes and binds to the enhancer heptamer motif 5'-TGA[CG]TCA-3'. When phosphorylated by HIPK3, it promotes the activity of NR5A1, leading to increased steroidogenic gene expression upon cAMP signaling pathway stimulation. It is involved in activated KRAS-mediated transcriptional activation of USP28 in colorectal cancer (CRC) cells and binds to the USP28 promoter in these cells.
Gene References Into Functions
  1. Research has shown that miR-139-5p is downregulated in the hearts of Hypertrophic cardiomyopathy patients and that it inhibits cardiac hypertrophy by targeting c-Jun expression. PMID: 29440459
  2. This study identified a crucial Jun/miR-22/HuR regulatory axis in CRC (the working model is summarized in Fig. 8) and highlighted the essential role of HuR and miR-22 in CRC proliferation and migration. PMID: 29351796
  3. A novel cascade mediated by AP-1 and FOXF1 that regulates oncogene-induced senescence is reported. PMID: 30119690
  4. Multivalent Interactions with Fbw7 and Pin1 Facilitate Recognition of c-Jun by the Fbw7. PMID: 29225075
  5. High AP-1 expression is associated with metastasis in colon cancer. PMID: 29305742
  6. Our findings suggest that extended AP-1 binding sites, along with adjacent binding sites for other transcription factors, encode part of the information governing transcription factor binding sites' activity within the genome. PMID: 29305491
  7. The expression of WIF-1 was low in GBC cells due to aberrant hypermethylation of its promoter region. Additionally, an alternative pathogenesis of GBC was indicated in which c-Jun causes hypermethylation of the WIF-1 promoter region and represses the expression of WIF-1 through transcriptional regulation and interaction with DNMT1 as an early event in the tumorigenesis of GBC. PMID: 29693707
  8. Mutant cellular AP-1 proteins promote expression of a subset of Epstein-Barr virus late genes in the absence of lytic viral DNA replication. PMID: 30021895
  9. Secreted Ta9 has the ability to stimulate CD8+ T cells, but also the potential to activate AP-1-driven transcription and contribute to T. annulata-induced leukocyte transformation. PMID: 29738531
  10. MiR-216b directly targets c-Jun, reducing AP-1-dependent transcription and sensitizing cells to ER stress-dependent apoptosis. PMID: 27173017
  11. Results suggest that c-Jun, p38 MAPK, PIK3CA/Akt, and GSK3 signaling are involved in the effect of miR-203 on the proliferation of hepatocellular carcinoma cells. PMID: 28887744
  12. These findings suggest that increased JUN expression and activity may contribute to gefitinib resistance in non-small cell lung cancer. PMID: 28566434
  13. The results indicated that butein possesses antiproliferative and proapoptotic properties through the suppression of NF-kappaB, AP-1, and Akt signaling in HTLV-1-infected T cells, both in vitro and in vivo, suggesting its therapeutic potential against HTLV-1-associated diseases, including adult T-cell leukemia/lymphoma. PMID: 28586006
  14. Results show that VEGFA induces c-jun expression in mediating human retinal microvascular endothelial cell migration, sprouting, and tube formation, and that Pyk2-STAT3 signaling enhances cJun expression in mediating retinal neovascularization. PMID: 27210483
  15. Increased c-jun expression is associated with nasopharyngeal carcinoma. PMID: 28269757
  16. Thrombin binding to PAR-1 receptor activated Gi-protein/c-Src/Pyk2/EGFR/PI3K/Akt/p42/p44 MAPK cascade, which in turn elicited AP-1 activation and ultimately evoked MMP-9 expression and cell migration in SK-N-SH cells. PMID: 27181591
  17. Findings provide evidence that phospho-c-Jun activates a crucial regulatory mechanism to control DNMT1 expression and regulate global DNA methylation in glioblastoma. PMID: 28036297
  18. Results demonstrated for the first time the regulatory mechanism of miR-744 transcription by c-Jun, providing a potential mechanism underlying the upregulation of miR-744 in cancers. PMID: 27533465
  19. Results provide evidence that NuRD represses c-Jun transcription directly which, in the absence of MBD3, activates endogenous pluripotent genes and regulates induced cancer stem cells-related genes. PMID: 27894081
  20. Taken together, these results indicated that PAR1 signaling-mediated cJun activation promotes early apoptosis of HUVEC cells induced by heat stress. PMID: 28447716
  21. Cheliensisin A (Chel A) treatment led to PH domain and Leucine rich repeat Protein Phosphatases (PHLPP2) protein degradation and subsequently increased in c-Jun phosphorylation, which could be attenuated by inhibition of autophagy mediated by Beclin 1. PMID: 27556506
  22. The positive feedback regulation of OCT4 and c-JUN, resulting in the continuous expression of oncogenes such as c-JUN, seems to play a critical role in the determination of the cell fate decision from induced pluripotent stem cells to cancer stem cells in liver cancer. PMID: 27341307
  23. miR-26b plays an anti-metastatic role and is downregulated in gastric cancer tissues via the KPNA2/c-jun pathway. PMID: 27078844
  24. The IL1B/AP-1/miR-30a/ADAMTS-5 axis regulates cartilage matrix degradation in osteoarthritis. PMID: 27067395
  25. TGM2 is involved in amyloid-beta (1-42)-induced pro-inflammatory activation via AP1/JNK signaling pathways in cultured monocytes. PMID: 27864692
  26. Integrative genomic analysis indicated overexpression of the AP-1 transcriptional complex, suggesting experimental therapeutic rationales, including blockade of the renin-angiotensin system. This led to the repurposing of the angiotensin II receptor antagonist, irbesartan, as an anticancer therapy, resulting in the patient experiencing a dramatic and durable response. PMID: 27022066
  27. Knockdown of CD44 reduced the protein level of xCT, a cystine transporter, and increased oxidative stress. However, an increase in GSH was also observed and was associated with enhanced chemoresistance in CD44-knockdown cells. Increased GSH was mediated by the Nrf2/AP-1-induced upregulation of GCLC, a subunit of the enzyme catalyzing GSH synthesis. PMID: 28185919
  28. This study highlights the role of AP1 in promoting the host gene expression profile that defines Ebola virus pathogenesis. PMID: 28931675
  29. This is the first study to show how TGF-beta regulates the expression of Claudin-4 through c-Jun signaling and how this pathway contributes to the migratory and tumorigenic phenotype of lung tumor cells. PMID: 27424491
  30. Data show that BRD4 controls RUNX2 by binding to the enhancers (ENHs), and each RUNX2 ENH is potentially controlled by a distinct set of TFs with c-JUN as the principal pivot of this regulatory platform. PMID: 28981843
  31. AP-1 likely plays a more significant role in the AR cistrome in fibroblasts. PMID: 27634452
  32. Elevated levels of bile acid increase the tumorigenic potential of pancreatic cancer cells by inducing FXR/FAK/c-Jun axis to upregulate MUC4 expression. PMID: 27185392
  33. Immunohistochemistry was employed to analyze cFos, cJun, and CD147 expression in 41 UCB cases and 34 noncancerous human bladder tissues. PMID: 28358415
  34. Taken together, these findings indicate that LT reduces c-Jun protein levels via two distinct mechanisms, thereby inhibiting critical cell functions, including cellular proliferation. PMID: 28893904
  35. Expression of either dominant-negative or constitutively active mutants of Nrf2, ATF4, or c-Jun confirmed that distinct transcription units are regulated by these transcription factors. PMID: 27278863
  36. Mutually exclusive transcriptional regulation by AP-1 (cjun/cfos) and non-canonical NF-kappaB (RelB/p52) downstream of MEK-ERK and NIK-IKK-alpha-NF-kappaB2 (p100) phosphorylation, respectively, was responsible for persistent Ccl20 expression in the colonic cells. PMID: 27590109
  37. Glucocorticoid receptor (GR) is recruited to activator protein-1 (AP-1) target genes in a DNA-binding-dependent manner. PMID: 28591827
  38. These results suggested that hyperphosphatemia in patients with CKD suppresses bone resorption by inhibiting osteoclastogenesis, which in turn impairs the regulation of bone metabolism. PMID: 28939042
  39. These results suggest that Bacteroides fragilis enterotoxin induced accumulation of autophagosomes in endothelial cells, but activation of a signaling pathway involving JNK, AP-1, and CHOP may interfere with complete autophagy. PMID: 28694294
  40. Overall, our results suggest that miR-4632 plays a crucial role in regulating HPASMC proliferation and apoptosis by suppression of cJUN, providing a novel therapeutic miRNA candidate for the treatment of pulmonary vascular remodeling diseases. It also implies that serum miR-4632 has the potential to serve as a circulating biomarker for PAH diagnosis. PMID: 28701355
  41. Findings suggest that AP-1 factors are regulators of RNA polymerase III (Pol III)-driven 5S rRNA and U6 snRNA expression with a potential role in cell proliferation. PMID: 28488757
  42. Our results indicate that assessing AP1 and PEA3 transcription factor status might be a good indicator of OAC status. However, we could not detect any associations with disease stage or patient treatment regime. This suggests that the PEA3-AP1 regulatory module more likely contributes generally to the cancer phenotype. In keeping with this observation, depletion of ETV1 and/or ETV4 causes an OAC cell growth defect. PMID: 28859074
  43. shRNA-mediated inhibition of JUN decreases AML cell survival and propagation in vivo. These data uncover a previously unrecognized role of JUN as a regulator of the unfolded protein response. PMID: 27840425
  44. These findings demonstrate an essential role for the ERK pathway, along with c-JUN and c-FOS, in the differentiation activity of LukS-PV. PMID: 27102414
  45. The present study defines the minimal TIM-3 promoter region and demonstrates its interaction with c-Jun during TIM-3 transcription in CD4(+) T cells. PMID: 27243212
  46. Taken together, our data demonstrate that JNK regulates triple-negative breast cancer (TNBC) tumorigenesis by promoting CSC phenotype through Notch1 signaling via activation of c-Jun and indicate that JNK/c-Jun/Notch1 signaling is a potential therapeutic target for TNBC. PMID: 27941886
  47. Regulation of osteosarcoma cell lung metastasis by the c-Fos/AP-1 target FGFR1. PMID: 26387545
  48. c-jun promoted FOXK1-mediated proliferation and metastasis via orthotopic implantation. PMID: 27882939
  49. Data provide evidence that AP-1 is a key determinant of endocrine resistance of breast cancer cells by mediating a global shift in the estrogen receptor transcriptional program. PMID: 26965145
  50. Comparison of how AP-1 (Jun/Jun dimer) and Epstein-Barr virus Zta recognize methyl groups within their cognate response elements. PMID: 28158710

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Database Links

HGNC: 6204

OMIM: 165160

KEGG: hsa:3725

STRING: 9606.ENSP00000360266

UniGene: Hs.696684

Protein Families
BZIP family, Jun subfamily
Subcellular Location
Nucleus.
Tissue Specificity
Expressed in the developing and adult prostate and prostate cancer cells.

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