JNK2/MAPK9 Polyclonal Antibody

Serine/threonine-protein kinase involved in various processes such as cell proliferation, differentiation, migration, transformation and programmed cell death. Extracellular stimuli such as proinflammatory 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. 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. In response to oxidative or ribotoxic stresses, inhibits rRNA synthesis by phosphorylating and inactivating the RNA polymerase 1-specific transcription initiation factor RRN3. Promotes stressed cell apoptosis by phosphorylating key regulatory factors including TP53 and YAP1. In T-cells, MAPK8 and MAPK9 are required for polarized differentiation of T-helper cells into Th1 cells. Upon T-cell receptor (TCR) stimulation, is activated by CARMA1, BCL10, MAP2K7 and MAP3K7/TAK1 to regulate JUN protein levels. Plays an important role in the osmotic stress-induced epithelial tight-junctions disruption. When activated, promotes beta-catenin/CTNNB1 degradation and inhibits the canonical Wnt signaling pathway. Participates also in neurite growth in spiral ganglion neurons. MAPK9 isoforms display different binding patterns: alpha-1 and alpha-2 preferentially bind to JUN, whereas beta-1 and beta-2 bind to ATF2. However, there is no correlation between binding and phosphorylation, which is achieved at about the same efficiency by all isoforms. JUNB is not a substrate for JNK2 alpha-2, and JUND binds only weakly to it.

JNK2; SAPK; p54a; JNK2A; JNK2B; PRKM9; JNK-55; SAPK1a; JNK2BETA; p54aSAPK; JNK2ALPHA; Mitogen-activated protein kinase 9; MAP kinase 9; MAPK 9; Stress-activated protein kinase 1a; Stress-activated protein kinase JNK2; c-Jun N-terminal kinase 2; MAPK9

5601

P45984

Cytoplasm, Nucleus

Human, Mouse, Rat

311-424/424

JNK2/MAPK9

Unconjugated

KLH conjugated synthetic peptide derived from human JNK2

WB, ELISA, IHC-P, IHC-F, IF (IHC-P), IF (IHC-F), IF (ICC)

Purified by Protein A.

1µg/µl

WB (1:300-5000), ELISA (1:500-1000), IHC-P (1:200-400), IHC-F (1:100-500), IF (IHC-P) (1:50-200), IF (IHC-F) (1:50-200), IF (ICC) (1:50-200)

0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol.

Unmodified

Shipped at 4°C. Store at -20°C for one year. Avoid repeated freeze/thaw cycles.

There is a 71% chance that this antibody will cross-react with MAPK10 (JNK3) if in the same tissue.

5601