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Product Name
Phospho-LKB1 (Ser334) Rabbit pAb
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Gene ID
6794
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SwissProt ID
Q15831
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Gene Name
STK11
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Alternative Names
STK11(phospho S334); LKB1(phospho Ser334); p-LKB1(phospho Ser334); p-LKB1(S334); LKB1; PJS; Renal carcinoma antigen NY-REN-19; Serine/Threonine Kinase 11; Serine/threonine protein kinase 11; Serine/threonine protein kinase LKB1; Serine/threonine-protein kinase 11; Serine/threonine-protein kinase LKB1; Stk11; STK11_HUMAN; hLKB1; Liver kinase B1; LKB 1; NY REN 19 antigen; Peutz Jeghers syndrome; PJS; Polarization related protein LKB1; Serine/threonine protein kinase STK11; Serine/threonine-protein kinase XEEK1; STK 11.
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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).
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Research Field
Cell Biology
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Product Categories
Primary antibody
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Host
Rabbit
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Reactivity
Human,Mouse,Rat
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Application
WB,IHC-F,IHC-P,ICC/IF,FC,ELISA
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Dilution Ratio
WB: 1/500-1/1000 IHC: 1/50-1/100 IF: 1/50-1/200 ELISA: 1/5000-1/10000
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Molecular Weight
Calculated MW: 48kDa
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Clonality
Polyclonal Antibody
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Clonality No.
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Isotype
IgG
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Immunogen
KLH conjugated Synthesised phosphopeptide derived from human LKB1 around the phosphorylation site of Ser334
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Purification
affinity purified by Protein A
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Conjugation
Unconjugated
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Modification
Phosphorylated
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Form
Liquid
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Buffer System
0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol.
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Storage
Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles.