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- IHC0134H
- 2025年10月15日
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50T
| 产品编号 | IHC0134H |
| 英文名称 | Human LKB1 Ready-To-Use IHC Kit |
| 中文名称 | 人苏氨酸蛋白激酶LKB1即用型免疫组化试剂盒 |
| 英文别名 | AA408040; hLKB1; LKB1; Par-4; PJS; R75140; STK11 |
| 产品应用 | IHC-P Not yet tested in other applications. |
| 交叉反应 | Human |
| 性状 | Lyophilized or Liqui |
| 亚基 | 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. |
| 亚细胞定位 | #Cytoplasm #Membrane #Mitochondrion #Nucleus |
| 组织特异性 | Ubiquitously expressed. Strongest expression in testis and fetal liver. |
| 翻译后修饰 | 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-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).By Similarity3 Publications Acetylated. Deacetylation at Lys-48 enhances cytoplasmic localization and kinase activity in vitro. |
| 相似性 | Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. LKB1 subfamily. |
| 功能 | 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. 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). |
| 保存条件 | Please store components at the temperatures indicated on the individual tube labels. The kit is stable for 6 months from the date of receipt. |
| 注意事项 | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. |
| 背景资料 | LKB1 (also known as STK11 - Serine/threonine-protein kinase STK11), a member of the serine/threonine kinase family, is a tumor suppressor. LKB1 physically associates with p53 and regulates specific p53 dependent apoptosis pathways. LKB1 is present in both the cytoplasm and nucleus of living cells and translocates to mitochondria during apoptosis. LKB1 functions as a master upstream protein kinase, regulating AMPK related kinases as well as AMPK. Mutations in LKB1 gene are associated with Peutz Jeghers syndrome. |
| 应用 | 推荐稀释比例 |
Immunohistochemical analysis of paraffin embedded human breast carcinoma tissue slide using IHC0134H (Human LKB1 IHC Kit).
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Human LKB1 Ready-To-Use IHC Kit(IHC0134H)-50T
￥3200
