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  • KD/KO Validated

MST1 Polyclonal antibody

MST1 Polyclonal Antibody for WB, IP, IF, IHC, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat and More (1)





Cat no : 22245-1-AP


KRS2, MST 1, MST1, serine/threonine kinase 4, STE20 like kinase MST1, STK4, STK4/MST1, YSK3

Tested Applications

Positive WB detected inHeLa cells, HepG2 cells, rat liver tissue, Jurkat cells, Ramos cells, C2C12 cells, mouse spleen tissue, rat spleen tissue
Positive IP detected inHeLa cells
Positive IHC detected inhuman prostate cancer tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inHepG2 cells

Recommended dilution

Western Blot (WB)WB : 1:1000-1:6000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for 1.0-3.0 mg of total protein lysate
Immunohistochemistry (IHC)IHC : 1:50-1:500
Immunofluorescence (IF)IF : 1:20-1:200
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

22245-1-AP targets MST1 in WB, IP, IF, IHC, ELISA applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat, sheep
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen MST1 fusion protein Ag17738
Full Name serine/threonine kinase 4
Calculated Molecular Weight 487 aa, 56 kDa
Observed Molecular Weight 56 kDa
GenBank Accession NumberBC093768
Gene Symbol STK4
Gene ID (NCBI) 6789
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

Mammalian STE20-like serine-threonine kinase MST1, encoded by the STK4 gene, is a multifunctional protein. MST1 and its closest paralogs MST2 (encoded by the STK3 gene), MST3, and MST4 are members of the Class II Germinal Center Family of Protein Kinases . STK3/4 and LATS1/2 (large tumor suppressor 1 and 2) are core kinase components of the Hippo tumor suppressor pathway in mammalians . In the conventional Hippo pathway, the STK3/4 and LATS1/2 signaling cascade phosphorylates and inactivates the transcriptional coactivator YAP1 (yes associated protein 1) and its close paralog WWTR1]. YAP1 and WWTR1 do not have DNA binding domains and they exert their biological outputs, such as cell proliferation and survival, by interacting with the TEAD1-4 transcription factors. Lines of evidence have indicated that dysregulation or loss of STK4/Hippo signaling is linked to developmental disorders and carcinogenesis with poor prognosis. STK4 is a stress-induced kinase and it can be activated in response to cell-death inducers. Autophosphorylation of STK4 at Thr183 (Thr180 in STK3) in the activation loop is a key activation mechanism for STK4/3 because phosphorylation of Thr183/180 causes the cleavage of STK4 by caspases under apoptotic conditions. The caspase-cleavage results in a more active STK4 protein (STK4-N, an amino-terminally truncated STK4), which localizes into the nucleus and induces apoptosis through histone modifications and chromatin condensations.


Product Specific Protocols
WB protocol for MST1 antibody 22245-1-APDownload protocol
IHC protocol for MST1 antibody 22245-1-APDownload protocol
IF protocol for MST1 antibody 22245-1-APDownload protocol
IP protocol for MST1 antibody 22245-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




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