Rabbit LKB1 Polyclonal Antibody | anti-LKB1 antibody

Phospho-LKB1 (Ser31) Antibody

Cat. Num. AAA328523

• Gene Names: STK11; PJS; LKB1; hLKB1
• Reactivity: Human, Mouse, Rat; Predicted: Pig, Zebrafish, Horse, Sheep, Chicken, Xenopus
• Applications: ELISA, Immunohistochemistry, Western Blot
• Purity: Purified rabbit serum by affinity purification via sequential chromatography on phospho- and non-phospho-peptide affinity columns.
• Synonyms: LKB1, Antibody; Phospho-LKB1 (Ser31) Antibody; hLKB1; Liver kinase B1; LKB1; PJS; Polarization related protein LKB1; Renal carcinoma antigen NY-REN-19; Serine/Threonine Kinase 11; Serine/threonine protein kinase 11; Serine/threonine protein kinase LKB1; Serine/threonine protein kinase STK11; Serine/threonine-protein kinase 11; Serine/threonine-protein kinase LKB1; Serine/threonine-protein kinase XEEK1; Stk11; STK11_HUMAN; anti-LKB1 antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat; Predicted: Pig, Zebrafish, Horse, Sheep, Chicken, Xenopus
• Clonality: Polyclonal
• Isotype: IgG
• Specificity: Phospho-LKB1 (Ser31) Antibody detects endogenous levels of LKB1 only when phosphorylated at Ser31.
• Purity/Purification: Purified rabbit serum by affinity purification via sequential chromatography on phospho- and non-phospho-peptide affinity columns.
• Form/Format: Liquid; Phosphate buffered saline, pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
• Concentration: 1mg/ml (varies by lot)
• Sequence Length: 433

• Applicable Applications for anti-LKB1 antibody: ELISA (Peptide ELISA), IHC (Immunohistochemistry), WB (Western Blot)
• Immunogen: A synthesized peptide derived from human LKB1 around the phosphorylation site of Ser31.
• Tissue Specificity: Ubiquitously expressed. Strongest expression in testis and fetal liver.
• Subcellular Location: Mitochondrion; Nucleus; Nucleus
• Preparation and Storage: Store at -20 degree C. Stable for 12 months from date of receipt.

WB (Western Blot)

(Western blot analysis of Phospho-LKB1 (Ser31) in lysates of HeLa , using Phospho-LKB1 (Ser31) Antibody.)

IHC (Immunohistochemisry)

(At 1/100 staining rat liver tissue sections by IHC-P. The tissue was formaldehyde fixed and a heat mediated antigen retrieval step in citrate buffer was performed. The tissue was then blocked and incubated with the antibody for 1.5 hours at 22 degree C. An HRP conjugated goat anti-rabbit antibody was used as the secondary)

IHC (Immunohiostchemistry)

(At 1/100 staining mouse spleen tissue sections by IHC-P. The tissue was formaldehyde fixed and a heat mediated antigen retrieval step in citrate buffer was performed. The tissue was then blocked and incubated with the antibody for 1.5 hours at 22 degree C. An HRP conjugated goat anti-rabbit antibody was used as the secondary)

IHC (Immunohistochemistry)

(At 1/100 staining mouse liver tissue sections by IHC-P. The tissue was formaldehyde fixed and a heat mediated antigen retrieval step in citrate buffer was performed. The tissue was then blocked and incubated with the antibody for 1.5 hours at 22 degree C. An HRP conjugated goat anti-rabbit antibody was used as the secondary)

Related Product Information for anti-LKB1 antibody

Description: 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).

Post Translational Modifications: Phosphorylated by ATM at Thr-363 following ionizing radiation (IR). Phosphorylation at Ser-428 by RPS6KA1 and/or some PKA is required to inhibit cell growth. Phosphorylation at Ser-428 is also required during neuronal polarization to mediate phosphorylation of BRSK1 and BRSK2 (By similarity). Phosphorylation by PKC/PRKCZ at Ser-428 promotes peroxynitrite-induced nuclear export of STK11, leading to PTEN activation and subsequent inhibition of AKT signaling. Phosphorylation by PKC/PRKCZ at Ser-399 in isoform 2 promotes metformin (or peroxynitrite)-induced nuclear export of STK11 and activation of AMPK. UV radiation-induced phosphorylation at Thr-363 mediates CDKN1A degradation (By similarity). Acetylated. Deacetylation at Lys-48 enhances cytoplasmic localization and kinase activity in vitro.

Subunit Structure: Catalytic component of a trimeric complex composed of STK11/LKB1, STRAD (STRADA or STRADB) and CAB39/MO25 (CAB39/MO25alpha or CAB39L/MO25beta): the complex tethers STK11/LKB1 in the cytoplasm and stimulates its catalytic activity. Found in a ternary complex composed of SMAD4, STK11/LKB1 and STK11IP. Interacts with p53/TP53, SMAD4, STK11IP and WDR6. Interacts with NR4A1. Interacts with NISCH; this interaction may increase STK11 activity. Interacts with PTEN; leading to PTEN phosphorylation. Interacts with SIRT1; the interaction deacetylates STK11. Interacts with CDKN1A.

Similarity: Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. LKB1 subfamily.

NCBI and Uniprot Product Information

• NCBI GI #: 4507271
• NCBI GeneID: 6794
• NCBI Accession #: NP_000446.1
• NCBI GenBank Nucleotide #: NP_000446.1
• UniProt Accession #: Q15831
• Molecular Weight: Observed: 54 kDa; Predicted: 49 kDa
• NCBI Official Full Name: serine/threonine-protein kinase STK11
• NCBI Official Synonym Full Names: serine/threonine kinase 11
• NCBI Official Symbol: STK11
• NCBI Official Synonym Symbols: PJS; LKB1; hLKB1
• NCBI Protein Information: serine/threonine-protein kinase STK11
• UniProt Protein Name: Serine/threonine-protein kinase STK11
• UniProt Gene Name: STK11
• UniProt Synonym Gene Names: LKB1; PJS; LKB1; hLKB1
• UniProt Entry Name: STK11_HUMAN