STK11 (LKB1) Blocking Peptide | STK11 blocking peptide

STK11 (LKB1) Antibody (C-term) Blocking peptide

• Gene Names: STK11; PJS; LKB1; hLKB1
• Synonyms: STK11 (LKB1); STK11 (LKB1) Antibody (C-term) Blocking peptide; Serine/threonine-protein kinase STK11; Liver kinase B1; LKB1; hLKB1; Renal carcinoma antigen NY-REN-19; STK11; PJS; STK11 blocking peptide

• Specificity: The synthetic peptide sequence used to generate the antibody was selected from the C-term region of human STK11. A 10 to 100 fold molar excess to antibody is recommended. Precise conditions should be optimized for a particular assay.
• Form/Format: The synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml deionized water for a final concentration of 1 mg/ml.
• Sequence Length: 433

• Cellular Location: Nucleus. Cytoplasm. Membrane. Mitochondrion. Note: A small fraction localizes at membranes (By similarity). Relocates to the cytoplasm when bound to STRAD (STRADA or STRADB) and CAB39/MO25 (CAB39/MO25alpha or CAB39L/MO25beta). Translocates to the mitochondrion during apoptosis. Translocates to the cytoplasm in response to metformin or peroxynitrite treatment. PTEN promotes cytoplasmic localization.
• Tissue Location: Ubiquitously expressed. Strongest expression in testis and fetal liver
• Preparation and Storage: Maintain refrigerated at 2-8 degree C for up to 6 months. For long term storage store at -20 degree C.

Related Product Information for STK11 blocking peptide

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).

NCBI and Uniprot Product Information

• NCBI GI #: 3024670
• NCBI GeneID: 6794
• UniProt Accession #: Q15831; B2RBX7; E7EW76
• Molecular Weight: 45,387 Da
• 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
• Protein Family: Serine/threonine-protein kinase
• UniProt Gene Name: STK11
• UniProt Synonym Gene Names: LKB1; PJS; LKB1; hLKB1
• UniProt Entry Name: STK11_HUMAN

NCBI Description

This gene, which encodes a member of the serine/threonine kinase family, regulates cell polarity and functions as a tumor suppressor. Mutations in this gene have been associated with Peutz-Jeghers syndrome, an autosomal dominant disorder characterized by the growth of polyps in the gastrointestinal tract, pigmented macules on the skin and mouth, and other neoplasms. Alternate transcriptional splice variants of this gene have been observed but have not been thoroughly characterized. [provided by RefSeq, Jul 2008]

Uniprot Description

LKB1: a S/T protein kinase of the CAMKL family. A tumor suppressor that helps control cell structure, polarity, apoptosis and energy homeostasis. Phosphorylates AGS3 (activator of G-protein signaling 3) GPR domains, regulating the interaction of GPR-containing proteins with G-proteins. A cytosolic protein complex comprised of LKB1, the pseudokinase STRAD, and the MO25 scaffold protein. Activates AMPK and several related protein kinases. AMPK plays a predominant role as the master regulator of cellular energy homeostasis, controlling downstream effectors that regulate cell growth and apoptosis in response to cellular ATP concentrations. The Lkb1/Strad/Mo25 complex can polarize single epithelial cells, leading to the formation of a brush border containing microvilli on the apical surface. Mutation in the corresponding gene causes Peutz-Jeghers syndrome (PJS), an autosomal dominant disorder characterized by benign GI tract polyps and dark skin lesions of the mouth, hands and feet. A variety of other LKB1 gene mutations have been associated with the formation of sporadic cancers in several tissues.

Protein type: Kinase, protein; Tumor suppressor; Protein kinase, Ser/Thr (non-receptor); Protein kinase, CAMK; Autophagy; EC 2.7.11.1; CAMK group; CAMKL family; LKB subfamily

Chromosomal Location of Human Ortholog: 19p13.3

Cellular Component: cytoplasm; cytosol; membrane; mitochondrion; nucleoplasm; nucleus

Molecular Function: ATP binding; magnesium ion binding; p53 binding; protein binding; protein kinase activator activity; protein serine/threonine kinase activity

Biological Process: anoikis; cell cycle arrest; establishment of cell polarity; glucose homeostasis; negative regulation of cell growth; negative regulation of cell proliferation; positive regulation of autophagy; positive regulation of transforming growth factor beta receptor signaling pathway; protein amino acid autophosphorylation; protein amino acid phosphorylation; regulation of cell growth; response to DNA damage stimulus; response to ionizing radiation; vasculature development

Disease: Pancreatic Cancer; Peutz-jeghers Syndrome; Testicular Germ Cell Tumor