Recombinant human Serine/threonine-protein kinase 4/MST-1 is a Human Full Length protein, expressed in Baculovirus infected Sf9, with >85% purity and suitable for SDS-PAGE, FuncS.
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Key facts
- Purity
- >85% Densitometry
- Expression system
- Baculovirus infected Sf9 cells
- Tags
- GST tag N-Terminus
- Applications
- SDS-PAGE, FuncS
- Biologically active
- Yes
Reactivity data
| Application | Reactivity | Dilution info | Notes |
|---|---|---|---|
Application SDS-PAGE | Reactivity Reacts | Dilution info - | Notes - |
Application FuncS | Reactivity Reacts | Dilution info - | Notes - |
Target data
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 (By similarity). 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.
Alternative names
KRS2, MST1, STK4, Serine/threonine-protein kinase 4, Mammalian STE20-like protein kinase 1, STE20-like kinase MST1, Serine/threonine-protein kinase Krs-2, MST-1
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Recombinant human Serine/threonine-protein kinase 4/MST-1 is a Human Full Length protein, expressed in Baculovirus infected Sf9, with >85% purity and suitable for SDS-PAGE, FuncS.
Key facts
- Purity
- >85% Densitometry
- Expression system
- Baculovirus infected Sf9 cells
- Tags
- GST tag N-Terminus
- Applications
- SDS-PAGE, FuncS
- Biologically active
- Yes
- Biological activity
- Active
- Accession
- Q13043-1
- Animal free
- No
- Species
- Human
- Concentration
- Storage buffer
pH: 7.5
Constituents: 25% Glycerol (glycerin, glycerine), 0.87% Sodium chloride, 0.79% Tris HCl, 0.00385% (R*,R*)-1,4-Dimercaptobutan-2,3-diol, 0.0038% EGTA, 0.00292% EDTA, 0.00174% PMSF
Sequence info
Amino acid sequence
- Accession
- Q13043
- Protein length
- Full Length
- Nature
- Recombinant
- Tags
- GST tag N-Terminus
Specifications
- Form
- Liquid
- Additional notes
Affinity purified.
General info
- 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 (By similarity). 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.
- Sequence similarities
Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. STE20 subfamily.
- 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.
- Subcellular localisation
- Nucleus
Storage
- Shipped at conditions
- Dry Ice
- Appropriate short-term storage conditions
- -80°C
- Appropriate long-term storage conditions
- -80°C
- Aliquoting information
- Upon delivery aliquot
- Storage information
- Avoid freeze / thaw cycle
This product is an active protein and may elicit a biological response in vivo, handle with caution.
Notes
IRS1 peptide ab204853 (IRS1 peptide) can be utilized as a substrate for assessing kinase activity
Previously labelled as Serine/threonine-protein kinase 4
Supplementary info
- This supplementary information is collated from multiple sources and compiled automatically.
- Activity summary
Serine/threonine-protein kinase 4 (MST-1) also known as STK4 is a 52 kDa enzyme that plays an important role in cellular signaling processes. This kinase ubiquitously expresses in many tissues including liver kidney and heart. MST-1 functions as a part of a complex facilitating its catalytic activity by activating downstream substrates. The alternative name for this protein is mammalian STE20-like protein kinase 1 linking MST-1 to a family of serine/threonine kinases.
- Biological function summary
This kinase orchestrates various cellular processes mainly through regulation of apoptosis and cell stress responses. MST-1 interacts with other signaling molecules in cells forming part of larger multi-protein complexes. These interactions allow MST-1 to act as a molecular switch effectively controlling the balance between cell survival and death. The cellular localization and interaction partners help diversify its biological roles.
- Pathways
MST-1 predominantly influences the Hippo signaling pathway—a pathway significant in controlling organ size and suppressing cancer. In this pathway MST-1 phosphorylates and activates LATS1/2 kinases creating an endpoint effect on cell proliferation and apoptosis. MST-1 also participates in the oxidative stress response pathway where it shows interaction with FoxO transcription factors leading to modifications in gene expression profiles.
- Associated diseases and disorders
The dysregulation of MST-1 is linked to cancer and cardiovascular diseases. In cancer the Hippo pathway's consistent activation by MST-1 helps modulate uncontrolled cell division while in cardiovascular diseases MST-1 plays a role by driving cardiomyocyte apoptosis. MST-1’s interplay with FoxO transcription factors also highlights its contribution to these diseases by reinforcing stress response and DNA repair mechanisms.
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4 product images
Functional Studies - Recombinant human Serine/threonine-protein kinase 4/MST-1 (ab60337)
The specific activity of Serine/threonine-protein kinase 4/MST-1 (ab60337) was determined to be 101.7 nmol/min/mg as per activity assay protocol and was equivalent to 953 nmol/min/mg as per radiometric assay
SDS-PAGE - Recombinant human Serine/threonine-protein kinase 4/MST-1 (ab60337)
SDS PAGE analysis of ab60337
Functional Studies - Recombinant human Serine/threonine-protein kinase 4/MST-1 (ab60337)
Sample Kinase Activity Plot.
SDS-PAGE - Recombinant human Serine/threonine-protein kinase 4/MST-1 (ab60337)
ab60337 on SDS-PAGE, MW ~83kDa.
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