Dojindo,-SulfoBiotics- PEG-PCMal/1/SB20, -SulfoBiotics- PEG-PCMal电泳分析可视化蛋白质氧化还原状态的试剂

蛋白质硫醇的修饰是最重要的翻译后修饰之一,它根据细胞中的氧化还原状态发生。最近发现,硫醇基团的修饰控制细胞功能,例如转录、蛋白质表达、细胞死亡等。因此,检测单个蛋白质的氧化还原状态对于了解细胞事件很重要。 -SulfoBiotics- PEG-PCMal 是一种通过电泳分析可视化蛋白质氧化还原状态的试剂。 PEG-PCMal 具有一个马来酰亚胺基团,可以与蛋白质硫醇基团共价结合。当一个 PEG-PCMal 分子与靶蛋白的硫醇基团结合时,通过电泳分析观察到对应于约 5 kDa 的迁移率变化。因此,通过迁移率变动分析,可以通过 SDS-PAGE 清楚地识别蛋白质上游离硫醇基团的数量。传统试剂 PEG-马来酰亚胺已广泛用于迁移率变化测定,但由于蛋白质中标记的 PEG 链,转移效率和蛋白质印迹上的抗体识别率较低。由于该试剂在分子中具有紫外光可裂解部分,因此在电泳后用紫外光照射凝胶中的标记蛋白将PEG链切断。因此,经紫外线照射处理的蛋白质可以从凝胶转移到 PVDF 膜上并被抗体检测。

Figure 1 Schematic protocol of PEG-PCMal

Figure 2 Structure of PEG-PCMal

Figure 3 Gel shift assay mechanism by PEG-PCMal depend on protein redox state

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Analysis of the redox states of TRX (Thioredoxin) in HeLa cells

Figure 4 Visualization of the redox state of the TRX in HeLa cells

Analysis of the redox states of protein (ATP synthase γ subunit) in Arabidopsis thaliana

Figure 5 Visualization of the redox state of the photoresponsive protein in Arabidopsis thaliana

Technical advisorDr. Toru Hisabori (Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology)Dr. Keisuke Yoshida (Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology)Dr. Satoshi Hara (School of Life Science and Technology, Tokyo Institute of Technology)