{"product_id":"recombinant-mouse-serine-threonine-protein-kinase-stk11-stk11-bhp10505827","title":"Recombinant Mouse Serine\/threonine-protein kinase STK11 (Stk11)","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThis Recombinant Protein provides recombinant \u003cstrong\u003eStk11\u003c\/strong\u003e from Mus musculus (Mouse), produced in Baculovirus (region 1-433aa). It is commonly used as a defined reagent for assay development, binding studies, and mechanistic research (RUO).\u003c\/p\u003e\u003ch2\u003eKey elements and design rationale\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegion:\u003c\/strong\u003e 1-433aa (domain boundaries can affect binding\/activity readouts).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpression host:\u003c\/strong\u003e Baculovirus (may differ from native PTMs\/processing).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTag(s):\u003c\/strong\u003e His, Myc (supports purification\/detection; consider tag effects in controls).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBiological background\u003c\/h2\u003e\u003cp\u003eAlso reported as Liver kinase B1 homolog Lkb1. 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.\u003c\/p\u003e\u003ch2\u003eResearch relevance and current trends\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eActivity assay development for kinetics, substrate scope, and inhibitor\/activator profiling.\u003c\/li\u003e\n\u003cli\u003eUse of recombinant standards to improve assay calibration and cross-study comparability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTumor 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. 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\u003c\/p\u003e\u003ch2\u003eCommon research applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard curve or spike-in reference for quantitative assays involving Stk11\u003c\/li\u003e\n\u003cli\u003eEnzymatic activity measurements with defined substrates\/cofactors (assay-dependent)\u003c\/li\u003e\n\u003cli\u003eCompound screening using concentration–response concepts (assay-dependent)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNotes for experimental interpretation\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRecombinant constructs may not capture all native isoforms or PTMs.\u003c\/li\u003e\n\u003cli\u003eConsider tag- or host-related effects when interpreting binding or activity.\u003c\/li\u003e\n\u003cli\u003eUse appropriate blanks and matrix\/control concepts to separate signal from background.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c!-- Sources (internal): - UniProtKB Q9WTK7 — UniProt — https:\/\/www.uniprot.org\/uniprotkb\/Q9WTK7 - NCBI Gene search: Stk11 — NCBI — https:\/\/www.ncbi.nlm.nih.gov\/gene\/?term=Stk11 - Ensembl search: Stk11 — Ensembl — https:\/\/www.ensembl.org\/Multi\/Search\/Results?q=Stk11 - Reactome Pathway Browser — Reactome — https:\/\/reactome.org\/ - NCBI Bookshelf — NCBI — https:\/\/www.ncbi.nlm.nih.gov\/books\/ --\u003e","brand":"CUSABIO TECHNOLOGY LLC","offers":[{"title":"1 mg","offer_id":53053370728813,"sku":"CSB-BP893402MO-1MG","price":3278.0,"currency_code":"USD","in_stock":true},{"title":"100 ug","offer_id":53053462380909,"sku":"CSB-BP893402MO-100UG","price":1478.0,"currency_code":"USD","in_stock":true},{"title":"20 ug","offer_id":53053462413677,"sku":"CSB-BP893402MO-20UG","price":528.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7424\/7277\/files\/CSB-BP893402MO-SDS.jpg?v=1772177518","url":"https:\/\/www.ebiohippo.com\/products\/recombinant-mouse-serine-threonine-protein-kinase-stk11-stk11-bhp10505827","provider":"BioHippo","version":"1.0","type":"link"}