Chk1 蛋白, Mouse (sf9, His-GST)

Chk1 is a serine/threonine protein kinase that critically coordinates checkpoint-mediated cell cycle arrest and DNA repair in response to DNA damage or unreplicated DNA. It negatively regulates unperturbed cell cycle progression and protects genome integrity by phosphorylating key targets such as CDC25A, CDC25B, CDC25C, RAD51, TP53, histone H3.1, RB1, SPRTN, TLK1 and FANCE. Chk1 Protein, Mouse (sf9, His-GST) is the recombinant mouse-derived Chk1 protein, expressed by Sf9 insect cells , with N-His, N-GST labeled tag. The total length of Chk1 Protein, Mouse (sf9, His-GST) is 476 a.a., with molecular weight of ~78 kDa.

Chk1 是一种丝氨酸/苏氨酸蛋白激酶，在协调检查点介导的细胞周期停滞和促进 DNA 修复以响应 DNA 损伤或未复制 DNA 方面发挥着至关重要的作用。此外，它在未受干扰的细胞周期中对细胞周期进程施加负调节，采用各种机制来保护基因组完整性。Chk1 识别底物共有序列 [RXXS/T] 并磷酸化关键靶标，例如 CDC25A、CDC25B、CDC25C 和 RAD51。值得注意的是，CDC25A 和 CDC25C 的磷酸化会产生 14-3-3 蛋白的结合位点，抑制其活性并阻碍细胞周期进程。Chk1 的复杂参与延伸到 TP53 的磷酸化，促进其激活，导致细胞周期停滞并抑制细胞增殖。此外，Chk1 磷酸化组蛋白 H3.1，影响基因表达的表观遗传调控。其多方面作用包括 RB1、SPRTN、TLK1 和 FANCE 的磷酸化，有助于转录、染色质组装和 DNA 修复过程的调节。Chk1 在维持基因组稳定性和协调细胞应对各种挑战方面发挥着关键作用。

Mouse

Sf9 insect cells

N-His;N-GST

O35280 (M1-T476)

12649  [NCBI]

Approximately 78 kDa

Greater than 90% as determined by reducing SDS-PAGE.

<1 EU/μg, determined by LAL method.