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P27/周期素依赖激酶抑制剂重组兔单抗
包装与价格:
产品名称 p27 KIP 1 Recombinant Rabbit mAb 产品介绍
P27/周期素依赖激酶抑制剂重组兔单抗 商品属性
产品介绍 中文名称P27/周期素依赖激酶抑制剂重组兔单抗 别 名CDN1B_HUMAN; AA408329; AI843786; Cdki1b; CDKN 1B; CDKN 4; CDKN1B; CDKN1B; CDKN4; CDKN4; Cyclin Dependent Kinase Inhibitor 1B; Cyclin Dependent Kinase Inhibitor 1B; Cyclin dependent kinase inhibitor p27; Cyclin dependent kinase inhibitor p27; Cyclin-dependent kinase inhibitor 1B(p27, Kip1); Cyclin-dependent kinase inhibitor 1B; Cyclin-dependent kinase inhibitor p27; Cyclin-dependent kinase inhibitor p27 Kip1; KIP 1; KIP1; MEN1B; MEN4; OTTHUMP00000195098; OTTHUMP00000195099; p27; p27 Kip1; P27-like cyclin-dependent kinase inhibitor; P27KIP1. 抗体来源Rabbit 克隆类型Recombinant 克 隆 号1B13 交叉反应Human,Mouse,Rat 产品应用IHC-P=1:100-500,IHC-F=1:100-500,IF=1:100-500 not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user. 理论分子量22 kDa 检测分子量 细胞定位细胞核 细胞浆 性 状Liquid 浓 度1mg/ml 免 疫 原A synthesized peptide derived from human p27 Kip1: 150-198 亚 型IgG 纯化方法affinity purified by Protein A 缓 冲 液PBS, Glycerol, BSA. 保存条件Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles. 注意事项This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. PubMedPubMed 产品介绍Cell cycle progression is regulated by cyclins and their cognate Cdks. p27 KIP 1 is a cell cycle regulatory mitotic inhibitor of cdk activity. p27 KIP 1 is a candidate tumor suppressor gene, and has been proposed to function as a possible mediator of TGF beta induced G1 arrest. p27 KIP 1 is up regulated in response to antimitogenic stimuli. The increased protein expression of p27 results in cellular arrest by binding to cyclin/Cdk complexes such as cyclin D1/Cdk4. p27 Kip1 is regulated by phosphorylation on serine 10 (S10) and threonine 187 (T187). Phosphorylation by CDK2 on T187 results in ubiquitylation and degradation of p27 Kip 1; while phosphorylation by hKIS on S10 signals the nuclear export to the cytoplasm. 靶点与功能
P53(TP53)是定位于17p13.1的经典抑癌基因,通过以下机制维持基因组稳定: 野生型功能:在DNA损伤时激活,通过转录调控诱导细胞周期阻滞(p21/WAF1介导G1期停滞)、DNA修复(上调MGMT)或凋亡(激活BAX/PUMA通路),半数以上人类肿瘤存在P53功能失活; 突变型特性:突变型P53(如R175H、R273H热点突变)丧失抑癌功能,甚至获得促转移、抗凋亡的“癌基因特性”,在肺癌(50%)、结直肠癌(43%)、卵巢癌(46%)中高频检出; 临床价值:突变型P53表达与肿瘤化疗耐药、预后不良正相关,是免疫组化(IHC)病理诊断的重要标志物(阳性判定标准:≥10%肿瘤细胞核染色)。 实验操作关键要点
IHC-P突变型P53检测(肺癌样本): 抗原修复:柠檬酸盐缓冲液(pH6.0)微波修复20分钟(石蜡切片),突变型P53核信号更稳定(野生型易降解); 阳性判读:≥10%肿瘤细胞核呈棕黄色强阳性(突变型典型特征),正常组织因野生型P53半衰期短(20分钟)呈阴性或弱阳性; 对照设置:必须包含P53野生型细胞系(如HCT116 p53+/+) 和敲除细胞系(HCT116 p53-/-) 作为阴阳对照。 WB验证(结直肠癌细胞系): 样本制备:HCT116(p53+/+)和SW480(p53 R273H突变)细胞用含10μM MG132(蛋白酶体抑制剂) 的RIPA裂解液冰上裂解30分钟,12000g离心取上清; 电泳条件:10% SDS-PAGE凝胶,恒压80V浓缩胶、120V分离胶,转膜采用0.45μm PVDF膜(250mA恒流1小时); 抗体孵育:一抗1:1000稀释(5% BSA+TBST),4℃孵育过夜,SW480样本条带强度显著高于HCT116(突变型P53稳定性增加)。 IF核定位实验(DNA损伤模型): 推荐与γ-H2AX抗体共染(Alexa Fluor 488标记P53,594标记γ-H2AX),激光共聚焦观察DNA损伤后P53向核内病灶聚集的动态过程(野生型P53在损伤位点富集,突变型则弥散分布)。 公司正在出售的产品
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