Host: | Rabbit |
Applications: | WB/IHC/IF/IP |
Reactivity: | Human/Mouse/Rat |
Note: | STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
Short Description: | Rabbit polyclonal antibody anti-STK4 (303-487) is suitable for use in Western Blot, Immunohistochemistry, Immunofluorescence and Immunoprecipitation research applications. |
Clonality: | Polyclonal |
Conjugation: | Unconjugated |
Isotype: | IgG |
Formulation: | PBS with 0.02% Sodium Azide, 50% Glycerol, pH7.3. |
Purification: | Affinity purification |
Dilution Range: | WB 1:500-1:1000 IHC-P 1:50-1:200 IF/ICC 1:50-1:200 IP 1:50-1:200 |
Storage Instruction: | Store at-20°C for up to 1 year from the date of receipt, and avoid repeat freeze-thaw cycles. |
Gene Symbol: | STK4 |
Gene ID: | 6789 |
Uniprot ID: | STK4_HUMAN |
Immunogen Region: | 303-487 |
Immunogen: | Recombinant fusion protein containing a sequence corresponding to amino acids 303-487 of human MST1/STK4 (NP_006273.1). |
Immunogen Sequence: | KRQESQQREVDQDDEENSEE DEMDSGTMVRAVGDEMGTVR VASTMTDGANTMIEHDDTLP SQLGTMVINAEDEEEEGTMK RRDETMQPAKPSFLEYFEQK EKENQINSFGKSVPGPLKNS SDWKIPQDGDYEFLKSWTVE DLQKRLLALDPMMEQEIEEI RQKYQSKRQPILDAIEAKKR RQQNF |
Tissue Specificity | Expressed in prostate cancer and levels increase from the normal to the malignant state (at protein level). Ubiquitously expressed. |
Post Translational Modifications | Autophosphorylated on serine and threonine residues. Phosphorylation at Thr-387 by PKB/AKT1, leads to inhibition of its: kinase activity, nuclear translocation and autophosphorylation at Thr-183. It also diminishes its cleavage by caspases and its ability to phosphorylate FOXO3. Proteolytically cleaved by caspase-3 during apoptosis at Asp-326 and Asp-349 resulting in a 37 kDa or a 39 kDa subunit respectively. The 39 kDa subunit is further cleaved into the 37 kDa form. Proteolytic cleavage results in kinase activation and nuclear translocation of the truncated form (MST1/N). It is less likely that cleavage at Asp-349 is a prerequisite for activation as this site is not conserved in the murine ortholog. |
Function | Stress-activated, pro-apoptotic kinase which, following caspase-cleavage, enters the nucleus and induces chromatin condensation followed by internucleosomal DNA fragmentation. Key component of the Hippo signaling pathway which plays a pivotal role in organ size control and tumor suppression by restricting proliferation and promoting apoptosis. The core of this pathway is composed of a kinase cascade wherein STK3/MST2 and STK4/MST1, in complex with its regulatory protein SAV1, phosphorylates and activates LATS1/2 in complex with its regulatory protein MOB1, which in turn phosphorylates and inactivates YAP1 oncoprotein and WWTR1/TAZ. Phosphorylation of YAP1 by LATS2 inhibits its translocation into the nucleus to regulate cellular genes important for cell proliferation, cell death, and cell migration. STK3/MST2 and STK4/MST1 are required to repress proliferation of mature hepatocytes, to prevent activation of facultative adult liver stem cells (oval cells), and to inhibit tumor formation. Phosphorylates 'Ser-14' of histone H2B (H2BS14ph) during apoptosis. Phosphorylates FOXO3 upon oxidative stress, which results in its nuclear translocation and cell death initiation. Phosphorylates MOBKL1A, MOBKL1B and RASSF2. Phosphorylates TNNI3 (cardiac Tn-I) and alters its binding affinity to TNNC1 (cardiac Tn-C) and TNNT2 (cardiac Tn-T). Phosphorylates FOXO1 on 'Ser-212' and regulates its activation and stimulates transcription of PMAIP1 in a FOXO1-dependent manner. Phosphorylates SIRT1 and inhibits SIRT1-mediated p53/TP53 deacetylation, thereby promoting p53/TP53 dependent transcription and apoptosis upon DNA damage. Acts as an inhibitor of PKB/AKT1. Phosphorylates AR on 'Ser-650' and suppresses its activity by intersecting with PKB/AKT1 signaling and antagonizing formation of AR-chromatin complexes. |
Protein Name | Serine/Threonine-Protein Kinase 4 Mammalian Ste20-Like Protein Kinase 1 Mst-1 Ste20-Like Kinase Mst1 Serine/Threonine-Protein Kinase Krs-2 Cleaved Into - Serine/Threonine-Protein Kinase 4 37kda Subunit Mst1/N - Serine/Threonine-Protein Kinase 4 18kda Subunit Mst1/C |
Database Links | Reactome: R-HSA-2028269 |
Cellular Localisation | Cytoplasm Nucleus The Caspase-Cleaved Form Cycles Between The Nucleus And Cytoplasm |
Alternative Antibody Names | Anti-Serine/Threonine-Protein Kinase 4 antibody Anti-Mammalian Ste20-Like Protein Kinase 1 antibody Anti-Mst-1 antibody Anti-Ste20-Like Kinase Mst1 antibody Anti-Serine/Threonine-Protein Kinase Krs-2 Cleaved Into - Serine/Threonine-Protein Kinase 4 37kda Subunit antibody Anti-Mst1/N - Serine/Threonine-Protein Kinase 4 18kda Subunit antibody Anti-Mst1/C antibody Anti-STK4 antibody Anti-KRS2 antibody Anti-MST1 antibody |
Information sourced from Uniprot.org