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LKB1 Protein (AA 1-430) (His tag)

Crystallography grade STK11 Origin: Human Host: Insect Cells Recombinant >95 % as determined by SDS PAGE, Size Exclusion Chromatography and Western Blot. WB, SDS, ELISA, Crys
Catalog No. ABIN3095657
  • Target See all LKB1 (STK11) Proteins
    LKB1 (STK11) (serine/threonine Kinase 11 (STK11))
    Protein Type
    Recombinant
    Protein Characteristics
    AA 1-430
    Origin
    • 6
    • 2
    • 1
    • 1
    Human
    Source
    • 3
    • 2
    • 2
    • 1
    • 1
    • 1
    • 1
    Insect Cells
    Purification tag / Conjugate
    This LKB1 protein is labelled with His tag.
    Application
    Western Blotting (WB), SDS-PAGE (SDS), ELISA, Crystallization (Crys)
    Sequence
    MEVVDPQQLG MFTEGELMSV GMDTFIHRID STEVIYQPRR KRAKLIGKYL MGDLLGEGSY GKVKEVLDSE TLCRRAVKIL KKKKLRRIPN GEANVKKEIQ LLRRLRHKNV IQLVDVLYNE EKQKMYMVME YCVCGMQEML DSVPEKRFPV CQAHGYFCQL IDGLEYLHSQ GIVHKDIKPG NLLLTTGGTL KISDLGVAEA LHPFAADDTC RTSQGSPAFQ PPEIANGLDT FSGFKVDIWS AGVTLYNITT GLYPFEGDNI YKLFENIGKG SYAIPGDCGP PLSDLLKGML EYEPAKRFSI RQIRQHSWFR KKHPPAEAPV PIPPSPDTKD RWRSMTVVPY LEDLHGADED EDLFDIEDDI IYTQDFTVPG QVPEEEASHN GQRRGLPKAV CMNGTEAAQL STKSRAEGRA PNPARKACSA SSKIRRLSAC
    Sequence without tag. Tag location is at the discretion of the manufacturer. If you have a special request, please contact us.
    Characteristics
    • Made in Germany - from design to production - by highly experienced protein experts.
    • Human STK11 Protein (raised in Insect Cells) purified by multi-step, protein-specific process to ensure crystallization grade.
    • State-of-the-art algorithm used for plasmid design (Gene synthesis).

    This protein is a made to order protein and will be made for the first time for your order. Our experts in the lab will ensure that you receive a correctly folded protein.

    The big advantage of ordering our made-to-order proteins in comparison to ordering custom made proteins from other companies is that there is no financial obligation in case the protein cannot be expressed or purified.

    In the unlikely event that the protein cannot be expressed or purified we do not charge anything (other companies might charge you for any performed steps in the expression process for custom-made proteins, e.g. fees might apply for the expression plasmid, the first expression experiments or purification optimization).

    When you order this made-to-order protein you will only pay upon receival of the correctly folded protein. With no financial risk on your end you can rest assured that our experienced protein experts will do everything to make sure that you receive the protein you ordered.

    The concentration of our recombinant proteins is measured using the absorbance at 280nm. The protein's absorbance will be measured in several dilutions and is measured against its specific reference buffer.

    The concentration of the protein is calculated using its specific absorption coefficient. We use the Expasy's protparam tool to determine the absorption coefficient of each protein.

    Purification
    Two step purification of proteins expressed in baculovirus infected SF9 insect cells:
    1. In a first purification step, the protein is purified from the cleared cell lysate using three different His-tag capture materials: high yield, EDTA resistant, or DTT resistant. Eluate fractions are analyzed by SDS-PAGE.
    2. Protein containing fractions of the best purification are subjected to second purification step through size exclusion chromatography. Eluate fractions are analyzed by SDS-PAGE and Western blot.
    Purity
    >95 % as determined by SDS PAGE, Size Exclusion Chromatography and Western Blot.
    Sterility
    0.22 μm filtered
    Endotoxin Level
    Protein is endotoxin free.
    Grade
    Crystallography grade
    Top Product
    Discover our top product STK11 Protein
  • Application Notes
    In addition to the applications listed above we expect the protein to work for functional studies as well. As the protein has not been tested for functional studies yet we cannot offer a gurantee though.
    Comment

    In cases in which it is highly likely that the recombinant protein with the default tag will be insoluble our protein lab may suggest a higher molecular weight tag (e.g. GST-tag) instead to increase solubility. We will discuss all possible options with you in detail to assure that you receive your protein of interest.

    Restrictions
    For Research Use only
  • Format
    Liquid
    Buffer
    100 mM NaCL, 20 mM Hepes, 10% glycerol. pH value is at the discretion of the manufacturer.
    Handling Advice
    Avoid repeated freeze-thaw cycles.
    Storage
    -80 °C
    Storage Comment
    Store at -80°C.
    Expiry Date
    Unlimited (if stored properly)
  • Target
    LKB1 (STK11) (serine/threonine Kinase 11 (STK11))
    Alternative Name
    STK11 (STK11 Products)
    Synonyms
    pjs Protein, LKB1 Protein, XEEK1 Protein, Stk11 Protein, PJS Protein, hLKB1 Protein, AA408040 Protein, Lkb1 Protein, Par-4 Protein, R75140 Protein, mLKB1 Protein, wu:fj61a05 Protein, zgc:110180 Protein, xeek1 Protein, serine/threonine kinase 11 Protein, polarization-related protein LKB1 Protein, serine/threonine kinase 11 L homeolog Protein, STK11 Protein, stk11 Protein, LOC662493 Protein, Stk11 Protein, stk11.L Protein
    Background
    Tumor suppressor serine/threonine-protein kinase that controls the activity of AMP-activated protein kinase (AMPK) family members, thereby playing a role in various processes such as cell metabolism, cell polarity, apoptosis and DNA damage response. Acts by phosphorylating the T-loop of AMPK family proteins, thus promoting their activity: phosphorylates PRKAA1, PRKAA2, BRSK1, BRSK2, MARK1, MARK2, MARK3, MARK4, NUAK1, NUAK2, SIK1, SIK2, SIK3 and SNRK but not MELK. Also phosphorylates non-AMPK family proteins such as STRADA, PTEN and possibly p53/TP53. Acts as a key upstream regulator of AMPK by mediating phosphorylation and activation of AMPK catalytic subunits PRKAA1 and PRKAA2 and thereby regulates processes including: inhibition of signaling pathways that promote cell growth and proliferation when energy levels are low, glucose homeostasis in liver, activation of autophagy when cells undergo nutrient deprivation, and B-cell differentiation in the germinal center in response to DNA damage. Also acts as a regulator of cellular polarity by remodeling the actin cytoskeleton. Required for cortical neuron polarization by mediating phosphorylation and activation of BRSK1 and BRSK2, leading to axon initiation and specification. Involved in DNA damage response: interacts with p53/TP53 and recruited to the CDKN1A/WAF1 promoter to participate in transcription activation. Able to phosphorylate p53/TP53, the relevance of such result in vivo is however unclear and phosphorylation may be indirect and mediated by downstream STK11/LKB1 kinase NUAK1. Also acts as a mediator of p53/TP53-dependent apoptosis via interaction with p53/TP53: translocates to the mitochondrion during apoptosis and regulates p53/TP53-dependent apoptosis pathways. In vein endothelial cells, inhibits PI3K/Akt signaling activity and thus induces apoptosis in response to the oxidant peroxynitrite (in vitro). Regulates UV radiation-induced DNA damage response mediated by CDKN1A. In association with NUAK1, phosphorylates CDKN1A in response to UV radiation and contributes to its degradation which is necessary for optimal DNA repair (PubMed:25329316). {ECO:0000269|PubMed:11430832, ECO:0000269|PubMed:12805220, ECO:0000269|PubMed:14517248, ECO:0000269|PubMed:14976552, ECO:0000269|PubMed:15016379, ECO:0000269|PubMed:15733851, ECO:0000269|PubMed:15987703, ECO:0000269|PubMed:17108107, ECO:0000269|PubMed:18321849, ECO:0000269|PubMed:21317932, ECO:0000269|PubMed:25329316}., Isoform 2: Has a role in spermiogenesis. {ECO:0000250}.
    Molecular Weight
    49.2 kDa Including tag.
    UniProt
    Q15831
    Pathways
    AMPK Signaling, Carbohydrate Homeostasis, Regulation of Carbohydrate Metabolic Process, Warburg Effect
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