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活化转录因子4抗体
包装与价格:
产品名称 ATF4 Rabbit pAb 产品介绍
商品属性 产品介绍This gene encodes a transcription factor that was originally identified as a widely expressed mammalian DNA binding protein that could bind a tax-responsive enhancer element in the LTR of HTLV-1. The encoded protein was also isolated and characterized as the cAMP-response element binding protein 2 (CREB-2). The protein encoded by this gene belongs to a family of DNA-binding proteins that includes the AP-1 family of transcription factors, cAMP-response element binding proteins (CREBs) and CREB-like proteins. These transcription factors share a leucine zipper region that is involved in protein-protein interactions, located C-terminal to a stretch of basic amino acids that functions as a DNA binding domain. Two alternative transcripts encoding the same protein have been described. Two pseudogenes are located on the X chromosome at q28 in a region containing a large inverted duplication. [provided by RefSeq, Sep 2011]
商品详情 英文名称ATF4 Rabbit pAb 中文名称活化转录因子4抗体 别 名Cyclic AMP response element binding protein 2; DNA binding protein TAXREB67; Activating Transcription Factor 4; ATF 4; ATF4 protein; CREB 2; CREB2; CREB-2; Cyclic AMP dependent transcription factor ATF 4; Tax Responsive Enhancer Element B67; TAXREB67; TXREB; ATF4_HUMAN. 研究领域肿瘤 信号转导 细胞凋亡 转录调节因子 抗体来源Rabbit 克隆类型Polyclonal 克 隆 号 交叉反应Human,Mouse,Rat (predicted: Rabbit,Pig,Sheep,Cow,Dog,Horse) 产品应用WB=1:500-2000,IHC-P=1:100-500,IHC-F=1:100-500,IF=1:100-500,Flow-Cyt=0.2μg /test,ICC/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38 kDa 检测分子量 细胞定位细胞核 细胞浆 细胞膜 性 状Liquid 浓 度1mg/ml 免 疫 原KLH conjugated synthetic peptide derived from human ATF4: 251-351/351 亚 型IgG 纯化方法affinity purified by Protein A 缓 冲 液0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol. 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 靶点与功能 ATF4(Activating Transcription Factor 4)是碱性亮氨酸拉链(bZIP)家族转录因子(分子量约38kDa),核心功能与研究价值包括: 内质网应激“效应器”:在PERK-eIF2α通路激活后被选择性翻译,通过结合CRE(cAMP反应元件)调控下游靶基因(如CHOP、ASNS、TRIB3),参与细胞存活/凋亡决策(ER应激过强时诱导CHOP介导的凋亡); 肿瘤代谢重编程:在缺氧、营养剥夺条件下高表达,通过激活天冬酰胺合成酶(ASNS) 和糖酵解相关基因,促进肿瘤细胞在低营养环境中存活(乳腺癌、胶质母细胞瘤中ATF4表达量是正常组织的2-4倍); 神经退行性疾病标志物:阿尔茨海默病(AD)模型中,ATF4通过上调PUMA(促凋亡蛋白)加剧神经元死亡,其抑制剂可改善认知功能障碍。 实验操作关键要点 WB内质网应激模型验证: 样本处理:用毒胡萝卜素(Tg,1μM) 或衣霉素(Tm,5μg/mL) 处理HepG2细胞8小时,RIPA裂解液(含1mM PMSF和PhosSTOP)冰上裂解30分钟; 抗体稀释:单抗1:1000稀释(5% BSA+TBST),4℃孵育过夜,HRP二抗1:5000室温孵育1小时,38kDa处显带,应激组灰度值为对照组的3-5倍; 内参选择:建议用β-actin(42kDa) 或GAPDH(37kDa),避免使用应激敏感的housekeeping基因(如tubulin)。 IHC-P肿瘤组织检测: 抗原修复:柠檬酸盐缓冲液(pH6.0)微波修复20分钟(石蜡切片),肿瘤细胞胞核呈棕黄色阳性(正常组织中低表达或阴性); 阳性对照:乳腺癌组织(缺氧区域ATF4核阳性率>60%); 联合染色:与Ki-67抗体共染,可观察ATF4⁺细胞的增殖活性(ATF4高表达常伴随Ki-67⁺细胞比例增加)。 IF核定位观察: Hela细胞爬片经0.5mM H₂O₂ 诱导氧化应激后,4%多聚甲醛固定15分钟,0.2% Triton X-100透化10分钟,抗体1:200稀释(4℃孵育过夜),Alexa Fluor 488标记二抗(绿色),DAPI复染细胞核,可见ATF4从胞质向核内转移(应激后3小时核定位信号最强)。 公司正在出售的产品
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