LKB1/MO25/STRAD Active human

recombinant, expressed in baculovirus infected insect cells, ≥70% (SDS-PAGE)

Serine/threonine kinase 11, STK11
En este momento no podemos mostrarle ni los precios ni la disponibilidad

biological source



expressed in baculovirus infected insect cells


≥70% (SDS-PAGE)


aqueous solution

mol wt

49 kDa (LKB1)
66 kDa (MO25)
74 kDa (STRAD)


pkg of 20 μg

storage condition

avoid repeated freeze/thaw cycles


>0.02 mg/mL

UniProt accession no.

shipped in

dry ice

storage temp.


Gene Information

human ... STK11(6794)

General description

The product is a complex of human Liver kinase B1 (LKB1), also known as serine/threonine kinase 11 (STK11) (GenBank Accession No. NM_000455; amino acids 2-433, with N-terminal His-tag), mouse protein- 25 (MO25) or calcium binding protein 39 (CAB39) (GenBank Accession No. NM_016289; amino acids 2-341, with N-terminal GST-tag) and STE20-related kinase adaptor alpha (STRAD) (GenBank Accession No. NM_001003787).


Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling.

Biochem/physiol Actions

Liver kinase B1 (LKB1), also known as serine/threonine kinase 11 (STK11), is a serine/threonine kinase that regulates cell polarity and functions as a tumor suppressor protein. LKB1 regulates the activity of adenosine monophosphate-activated protein kinase (AMPK), promoting the suppression of growth and proliferation under energetically unfavorable conditions. Mouse protein-25 (MO25) or calcium binding protein 39 (CAB39) is a scaffolding protein which modulates the activities of STE20 family protein kinases. The MO25a isoform is part of the LKB1 tumor suppressor complex. STE20-related kinase adaptor α (STRAD) is a pseudokinase. It forms a heterotrimeric complex with LKB1 and MO25. The LKB1/MO25/STRAD complex modulates the metabolism, proliferation and cellular polarity of human intestinal epithelial cells.

Physical form

Formulated in 25 mM Tris-HCl, pH 8.0, 100 mM NaCl, 0.05% Tween-20, 50% glycerol and 3 mM DTT.

Preparation Note

Thaw on ice. Upon first thaw, briefly spin tube containing enzyme to recover full content of the tube. Aliquot enzyme into single use aliquots. Store remaining undiluted enzyme in aliquots at -70°C. Note: Enzyme is very sensitive to freeze/thaw cycles.


NONH for all modes of transport

WGK Germany


Flash Point F

Not applicable

Flash Point C

Not applicable

Certificado de Análisis
Structural insights into the activation of MST3 by MO25.
Mehellou Y
Biochemical and Biophysical Research Communications, 431(3), 604-609 (2013)
P A Marignani et al.
Cancer biology & therapy, 6(10), 1627-1631 (2007-10-09)
STRADalpha is a pseudokinase that forms a heterotrimeric complex with the scaffolding protein MO25 and the tumor suppressor serine threonine protein kinase LKB1. Mutations in the LKB1 gene are responsible for the Peutz-Jeghers Syndrome (PJS) characterized by a predisposition to...
Yue Zong et al.
Cell research, 29(6), 460-473 (2019-04-06)
AMPK, a master regulator of metabolic homeostasis, is activated by both AMP-dependent and AMP-independent mechanisms. The conditions under which these different mechanisms operate, and their biological implications are unclear. Here, we show that, depending on the degree of elevation of...
We present an article about how proliferating cells require the biosynthesis of structural components for biomass production and for genomic replication.
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