KRAS系列蛋白，活性验证！

KRAS热度已经消退了？NO...据调查，现在除传统针对KRAS靶点小分子药物外，更多玩家尝试新兴疗法征服这一“不可成药”的难题，如疫苗，TCR-T疗法等。

KRAS可以被细胞外信号以及来自细胞器等亚细胞结构的信号所激活。在正常的生理环境下，野生型KRAS主要处于不活跃的GDP结合状态。信号促使KRAS脱离GDP，并与GTP结合，将KRAS转化为激活状态。激活的KRAS能够结合并激活效应蛋白，如RAF激酶、PI3K和RalGDS，促进下游级联的信号通路，如MAPK、PI3K和Ral-GEFs通路。这些信号通路通过细胞复制、生长、分化和促进细胞周期进程。

一个激活的致癌KRAS基因导致一个突变的KRAS蛋白，由于GTP水解率大大降低，异常长时间保持其活性GTP结合状态。当KRAS蛋白被困在“ON”位置时，下游效应通路也保持活跃，细胞增殖率保持很高。其他仍然活跃的效应通路包括那些促进肿瘤发展过程的通路，如有丝分裂、细胞迁移、肿瘤侵袭和血管生成。

KRAS靶点相关蛋白

全部KRAS相关蛋白均已原核表达系统（E.coli）进行表达。通过HTRF方式验证其结合活性。

The KRAS-WT activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS- WT protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal.

The KRAS-G12C activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS-G12C protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal.

The KRAS-G12D activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS-G12D protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal

The KRAS-G12R activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS-G12R protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal.

The KRAS- G12V activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS- G12V protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal.

The KRAS-G13C activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS-G13C protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620nm signal.

The KRAS-Q61H activity was assayed with HTRF technology. The reaction was performed by incubating the KRAS-Q61H protein, GTP, cRAF and beads at 25℃ for 60 min, then reading Ratio 665/620